18 research outputs found
Calidad de sentencias sobre el proceso penal del delito de lesiones leves, en el expediente N.º 02696 –2014 – 0- 0501 – JR -PE-01, Del Distrito Judicial De Ayacucho – Huamanga, 2019
La presente investigación de la calidad de sentencia sobre el proceso penal deldelito
de lesiones leves, en el expediente N.º 02696- 2014 -0- 0501 -JR-PE- 01, del Distrito Judicial
de Ayacucho-Huamanga 2019, busca cooperar en la mejora de la calidad de las sentencias
judiciales, para ello, siguiendo la línea de investigación científica señalada por Reglamento
de Investigación de la Universidad, se basó en el análisis de las sentencias de un proceso
culminado, con el objetivo de determinar su calidad, basándose en la norma, la doctrina y la
jurisprudencia pertinente como parámetros. La metodología empleada fue: tipo de
investigación fundamental o básica;nivel descriptivo; diseño no experimental, retrospectivo
y trasversal; y de enfoque cualitativo. El expediente, objeto de recolección de datos por
medio de la técnica de observación y el análisis de contenido, fue seleccionada a través de
la técnica de muestreo por conveniencia. Para luego ser estudiado con la ayuda del
instrumento de lista de cotejo del cuadro de operacionalización de variables. El análisis de
resultadosreveló que la calidad de la sentencia, emitida en primera instancia, fue muy alta y
la calidad de la sentencia de vista fue alta.Tesi
Preparation of Continuous Highly Hydrophobic Pure Silica ITQ-29 Zeolite Layers on Alumina Supports
[EN] The preparation of continuous layers of highly hydrophobic pure silica ITQ-29 zeolite, potentially applicable as hydrophobic membranes for separation of molecules based on their polarity, has been investigated. Continuous layers of intergrown ITQ-29 zeolite crystals were successfully grown on porous alumina supports by optimization of the synthesis conditions, such as the appropriate selection of the seeds, the procedure for the gel preparation, and the calcination conditions. This resulted in the formation of all silica ITQ-29 zeolite layers without the presence of germanium required in previously reported ITQ-29 membranes, with the subsequent improvement in quality and stability, as verified by the absence of cracks after calcination. We have proved that the incorporation of aluminum from the support into the zeolite layer does not occur, neither during the secondary growth nor through migration of aluminum species during calcination.This research was funded by the European Research Council, grant ERC-AdG-2014-671093 (SynCatMatch) and the Spanish Government, through "Severo Ochoa" grant SEV-2016-0683 and RTI2018-101784-B-I00.Palomino Roca, M.; Ono, H.; Valencia Valencia, S.; Corma Canós, A. (2020). Preparation of Continuous Highly Hydrophobic Pure Silica ITQ-29 Zeolite Layers on Alumina Supports. Molecules. 25(18):1-13. https://doi.org/10.3390/molecules25184150S1132518Mascal, M. (2012). Chemicals from biobutanol: technologies and markets. Biofuels, Bioproducts and Biorefining, 6(4), 483-493. doi:10.1002/bbb.1328Ndaba, B., Chiyanzu, I., & Marx, S. (2015). n-Butanol derived from biochemical and chemical routes: A review. Biotechnology Reports, 8, 1-9. doi:10.1016/j.btre.2015.08.001Huang, H.-J., Ramaswamy, S., & Liu, Y. (2014). Separation and purification of biobutanol during bioconversion of biomass. Separation and Purification Technology, 132, 513-540. doi:10.1016/j.seppur.2014.06.013Barton, W. E., & Daugulis, A. (1992). Evaluation of solvents for extractive butanol fermentation with Clostridium acetobutylicum and the use of poly(propylene glycol) 1200. Applied Microbiology and Biotechnology, 36(5). doi:10.1007/bf00183241Raganati, F., Procentese, A., Olivieri, G., Russo, M. E., Salatino, P., & Marzocchella, A. (2020). Bio-butanol recovery by adsorption/desorption processes. Separation and Purification Technology, 235, 116145. doi:10.1016/j.seppur.2019.116145Xue, C., Zhao, J.-B., Chen, L.-J., Bai, F.-W., Yang, S.-T., & Sun, J.-X. (2014). Integrated butanol recovery for an advanced biofuel: current state and prospects. Applied Microbiology and Biotechnology, 98(8), 3463-3474. doi:10.1007/s00253-014-5561-6Sadrimajd, P., Rene, E. R., & Lens, P. N. L. (2019). Adsorptive recovery of alcohols from a model syngas fermentation broth. Fuel, 254, 115590. doi:10.1016/j.fuel.2019.05.173Qureshi, N., Hughes, S., Maddox, I. S., & Cotta, M. A. (2005). Energy-efficient recovery of butanol from model solutions and fermentation broth by adsorption. Bioprocess and Biosystems Engineering, 27(4), 215-222. doi:10.1007/s00449-005-0402-8Milestone, N. B., & Bibby, D. M. (1981). Concentration of alcohols by adsorption on silicalite. Journal of Chemical Technology and Biotechnology, 31(1), 732-736. doi:10.1002/jctb.280310198http://www.iza-structure.org/databases/Weckhuysen, B. M., & Yu, J. (2015). Recent advances in zeolite chemistry and catalysis. Chemical Society Reviews, 44(20), 7022-7024. doi:10.1039/c5cs90100fDusselier, M., & Davis, M. E. (2018). Small-Pore Zeolites: Synthesis and Catalysis. Chemical Reviews, 118(11), 5265-5329. doi:10.1021/acs.chemrev.7b00738Rangnekar, N., Mittal, N., Elyassi, B., Caro, J., & Tsapatsis, M. (2015). Zeolite membranes – a review and comparison with MOFs. Chemical Society Reviews, 44(20), 7128-7154. doi:10.1039/c5cs00292cKorelskiy, D., Leppäjärvi, T., Zhou, H., Grahn, M., Tanskanen, J., & Hedlund, J. (2013). High flux MFI membranes for pervaporation. Journal of Membrane Science, 427, 381-389. doi:10.1016/j.memsci.2012.10.016Negishi, H., Sakaki, K., & Ikegami, T. (2010). Silicalite Pervaporation Membrane Exhibiting a Separation Factor of over 400 for Butanol. Chemistry Letters, 39(12), 1312-1314. doi:10.1246/cl.2010.1312Ueno, K., Negishi, H., Okuno, T., Tawarayama, H., Ishikawa, S., Miyamoto, M., … Oumi, Y. (2019). Effects of seed crystal type on the growth and microstructures of silicalite-1 membranes on tubular silica supports via gel-free steam-assisted conversion. Microporous and Mesoporous Materials, 289, 109645. doi:10.1016/j.micromeso.2019.109645Elyassi, B., Jeon, M. Y., Tsapatsis, M., Narasimharao, K., Basahel, S. N., & Al-Thabaiti, S. (2015). Ethanol/water mixture pervaporation performance of b
-oriented silicalite-1 membranes made by gel-free secondary growth. AIChE Journal, 62(2), 556-563. doi:10.1002/aic.15124Lan, J., Saulat, H., Wu, H., Li, L., Yang, J., Lu, J., & Zhang, Y. (2020). Manipulation on microstructure of MFI membranes by binary structure directing agents. Microporous and Mesoporous Materials, 299, 110128. doi:10.1016/j.micromeso.2020.110128Ueno, K., Yamada, S., Negishi, H., Okuno, T., Tawarayama, H., Ishikawa, S., … Oumi, Y. (2020). Fabrication of pure-silica *BEA-type zeolite membranes on tubular silica supports coated with dilute synthesis gel via steam-assisted conversion. Separation and Purification Technology, 247, 116934. doi:10.1016/j.seppur.2020.116934Kida, K., Maeta, Y., & Yogo, K. (2018). Pure silica CHA-type zeolite membranes for dry and humidified CO2/CH4 mixtures separation. Separation and Purification Technology, 197, 116-121. doi:10.1016/j.seppur.2017.12.060Imasaka, S., Nakai, A., Araki, S., & Yamamoto, H. (2018). Synthesis and Gas Permeation Properties of STT-type Zeolite Membranes. Journal of the Japan Petroleum Institute, 61(5), 263-271. doi:10.1627/jpi.61.263Reed, T. B., & Breck, D. W. (1956). Crystalline Zeolites. II. Crystal Structure of Synthetic Zeolite, Type A. Journal of the American Chemical Society, 78(23), 5972-5977. doi:10.1021/ja01604a002Corma, A., Rey, F., Rius, J., Sabater, M. J., & Valencia, S. (2004). Supramolecular self-assembled molecules as organic directing agent for synthesis of zeolites. Nature, 431(7006), 287-290. doi:10.1038/nature02909García, E. J., Pérez-Pellitero, J., Pirngruber, G. D., Jallut, C., Palomino, M., Rey, F., & Valencia, S. (2014). Tuning the Adsorption Properties of Zeolites as Adsorbents for CO2 Separation: Best Compromise between the Working Capacity and Selectivity. Industrial & Engineering Chemistry Research, 53(23), 9860-9874. doi:10.1021/ie500207sPalomino, M., Corma, A., Rey, F., & Valencia, S. (2009). New Insights on CO2−Methane Separation Using LTA Zeolites with Different Si/Al Ratios and a First Comparison with MOFs. Langmuir, 26(3), 1910-1917. doi:10.1021/la9026656Van der Perre, S., Gelin, P., Claessens, B., Martin-Calvo, A., Cousin Saint Remi, J., Duerinck, T., … Denayer, J. F. M. (2017). Intensified Biobutanol Recovery by using Zeolites with Complementary Selectivity. ChemSusChem, 10(14), 2968-2977. doi:10.1002/cssc.201700667Serrano, D. P., Calleja, G., Botas, J. A., & Gutierrez, F. J. (2007). Characterization of adsorptive and hydrophobic properties of silicalite-1, ZSM-5, TS-1 and Beta zeolites by TPD techniques. Separation and Purification Technology, 54(1), 1-9. doi:10.1016/j.seppur.2006.08.013Zhang, K., Lively, R. P., Noel, J. D., Dose, M. E., McCool, B. A., Chance, R. R., & Koros, W. J. (2012). Adsorption of Water and Ethanol in MFI-Type Zeolites. Langmuir, 28(23), 8664-8673. doi:10.1021/la301122hDemontis, P., Stara, G., & Suffritti, G. B. (2003). Behavior of Water in the Hydrophobic Zeolite Silicalite at Different Temperatures. A Molecular Dynamics Study. The Journal of Physical Chemistry B, 107(18), 4426-4436. doi:10.1021/jp0300849Tiscornia, I., Valencia, S., Corma, A., Téllez, C., Coronas, J., & Santamaría, J. (2008). Preparation of ITQ-29 (Al-free zeolite A) membranes. Microporous and Mesoporous Materials, 110(2-3), 303-309. doi:10.1016/j.micromeso.2007.06.019Hunt, H. K., Lew, C. M., Sun, M., Yan, Y., & Davis, M. E. (2010). Pure-silica zeolite thin films by vapor phase transport of fluoride for low-k applications. Microporous and Mesoporous Materials, 128(1-3), 12-18. doi:10.1016/j.micromeso.2009.07.023Fernández-Barquín, A., Casado-Coterillo, C., Palomino, M., Valencia, S., & Irabien, A. (2016). Permselectivity improvement in membranes for CO2/N2 separation. Separation and Purification Technology, 157, 102-111. doi:10.1016/j.seppur.2015.11.032Casado-Coterillo, C., Fernández-Barquín, A., Valencia, S., & Irabien, Á. (2018). Estimating CO2/N2 Permselectivity through Si/Al = 5 Small-Pore Zeolites/PTMSP Mixed Matrix Membranes: Influence of Temperature and Topology. Membranes, 8(2), 32. doi:10.3390/membranes8020032Fernández-Barquín, A., Casado-Coterillo, C., Palomino, M., Valencia, S., & Irabien, A. (2015). LTA/Poly(1-trimethylsilyl-1-propyne) Mixed-Matrix Membranes for High-Temperature CO2/N2Separation. Chemical Engineering & Technology, 38(4), 658-666. doi:10.1002/ceat.201400641Baerlocher, C., & McCusker, L. B. (1994). Practical Aspects of Powder Diffraction Data Analysis. Studies in Surface Science and Catalysis, 391-428. doi:10.1016/s0167-2991(08)60775-2White, J., Dutta, P. K., Shqau, K., & Verweij, H. (2008). Synthesis of zeolite L membranes with sub-micron to micron thicknesses. Microporous and Mesoporous Materials, 115(3), 389-398. doi:10.1016/j.micromeso.2008.02.012Lee, J. S., Kim, J. H., Lee, Y. J., Jeong, N. C., & Yoon, K. B. (2007). Manual Assembly of Microcrystal Monolayers on Substrates. Angewandte Chemie International Edition, 46(17), 3087-3090. doi:10.1002/anie.20060436
One-pot two-step process for direct propylene oxide production catalyzed by bi-functional Pd(Au)@TS-1 materials
[EN] Different bi-functional materials (Pd(Au)@TS-1) based on metallic nanoparticles supported onto active nanocrystalline titanium silicalite (TS-1) zeolites were synthesized, characterized and used as recyclable heterogeneous catalysts for direct propylene oxide production from hydrogen, oxygen and propylene through one-pot two-step consecutive process. These catalysts allowed carrying out the combined reaction where metallic nanoparticles catalyzed the formation of in situ H2O2 that was the necessary intermediate for propylene epoxidation catalyzed by active TS-1 nanocrystalline support. Several variables were considered such as use of supercritical CO2 conditions, modifiable content of metallic species, and presence of additional co-solvents, surface acidity inhibitors and H2O2 stabilizers. Reusability and stability of the bi-functional catalyst was showed through consecutive catalytic cycles.The research leading to these results has received funding from European Community’s Seventh Framework Programme, through the Collaborative Project INCAS, Contract Nr. NMP2-LA-2010- 245988. Authors thank additional funds from Spanish Government (MAT2014-52085-C2-1-P and Severo Ochoa Excellence Program SEV-2012-0267).Prieto Arnal, A.; Palomino Roca, M.; Díaz Morales, UM.; Corma Canós, A. (2016). One-pot two-step process for direct propylene oxide production catalyzed by bi-functional Pd(Au)@TS-1 materials. Applied Catalysis A: General. 523:73-84. https://doi.org/10.1016/j.apcata.2016.05.019S738452
Zeolite Rho: a highly selective adsorbent for CO2/CH4 separation induced by a structural phase modification
[EN] Zeolite Rho is able to successfully separate CO2 from CH4 with the highest selectivity ever observed on the basis of pore diameter and surface polarity. The adsorption of CO2 provokes structural changes in the zeolite Rho.We acknowledge financial support from Spanish CICYT (MAT2009-14528-C02-01, CTQ2010-17988/PPQ) and European Project TopCombi (NMP2-CT2005-515792). M.P. thanks CSIC for a JAE doctoral fellowship. The authors thank the referee for the suggestion to carry out structural studies.Palomino Roca, M.; Corma Canós, A.; Jorda Moret, JL.; Rey Garcia, F.; Valencia Valencia, S. (2012). Zeolite Rho: a highly selective adsorbent for CO2/CH4 separation induced by a structural phase modification. Chemical Communications. 48(2):215-217. doi:10.1039/C1CC16320ES215217482Ruthven, D. M., & Reyes, S. C. (2007). Adsorptive separation of light olefins from paraffins. Microporous and Mesoporous Materials, 104(1-3), 59-66. doi:10.1016/j.micromeso.2007.01.005Jiang, J., Yu, J., & Corma, A. (2010). Extra-Large-Pore Zeolites: Bridging the Gap between Micro and Mesoporous Structures. Angewandte Chemie International Edition, 49(18), 3120-3145. doi:10.1002/anie.200904016R. T. Yang , Adsorbents: Fundamentals and Applications, John Wiley and Sons, Hoboken, New Jersey, 2003, p. 157S. Sircar and A. L.Myers, Gas separation by zeolites, in Handbook of Zeolite Science and Technology, ed. S. M. Auerbach, K. A. Carrado and P. K. Dutta, 2003, p. 1063R. M. Barrer , Zeolites and Clay Minerals as Sorbents and Molecular Sieves, Academic Press, London, 1978Corma, A., Rey, F., Rius, J., Sabater, M. J., & Valencia, S. (2004). Supramolecular self-assembled molecules as organic directing agent for synthesis of zeolites. Nature, 431(7006), 287-290. doi:10.1038/nature02909Olson, D. H., Camblor, M. A., Villaescusa, L. A., & Kuehl, G. H. (2004). Light hydrocarbon sorption properties of pure silica Si-CHA and ITQ-3 and high silica ZSM-58. Microporous and Mesoporous Materials, 67(1), 27-33. doi:10.1016/j.micromeso.2003.09.025Zhu, W., Kapteijn, F., & Moulijn, J. A. (1999). Shape selectivity in the adsorption of propane/propene on the all-silica DD3R. Chemical Communications, (24), 2453-2454. doi:10.1039/a906465fPalomino, M., Cantín, A., Corma, A., Leiva, S., Rey, F., & Valencia, S. (2007). Pure silica ITQ-32 zeolite allows separation of linear olefins from paraffins. Chem. Commun., (12), 1233-1235. doi:10.1039/b700358gTijsebaert, B., Varszegi, C., Gies, H., Xiao, F.-S., Bao, X., Tatsumi, T., … De Vos, D. (2008). Liquid phase separation of 1-butene from 2-butenes on all-silica zeolite RUB-41. Chemical Communications, (21), 2480. doi:10.1039/b719463cOlson, D. H., Yang, X., & Camblor, M. A. (2004). ITQ-12: A Zeolite Having Temperature Dependent Adsorption Selectivity and Potential for Propene Separation. The Journal of Physical Chemistry B, 108(30), 11044-11048. doi:10.1021/jp040216dDenayer, J. F., Souverijns, W., Jacobs, P. A., Martens, J. A., & Baron, G. V. (1998). High-Temperature Low-Pressure Adsorption of Branched C5−C8Alkanes on Zeolite Beta, ZSM-5, ZSM-22, Zeolite Y, and Mordenite. The Journal of Physical Chemistry B, 102(23), 4588-4597. doi:10.1021/jp980674kAmrouche, H., Aguado, S., Pérez-Pellitero, J., Chizallet, C., Siperstein, F., Farrusseng, D., … Nieto-Draghi, C. (2011). Experimental and Computational Study of Functionality Impact on Sodalite–Zeolitic Imidazolate Frameworks for CO2Separation. The Journal of Physical Chemistry C, 115(33), 16425-16432. doi:10.1021/jp202804gWang, B., Côté, A. P., Furukawa, H., O’Keeffe, M., & Yaghi, O. M. (2008). Colossal cages in zeolitic imidazolate frameworks as selective carbon dioxide reservoirs. Nature, 453(7192), 207-211. doi:10.1038/nature06900Serra-Crespo, P., Ramos-Fernandez, E. V., Gascon, J., & Kapteijn, F. (2011). Synthesis and Characterization of an Amino Functionalized MIL-101(Al): Separation and Catalytic Properties. Chemistry of Materials, 23(10), 2565-2572. doi:10.1021/cm103644bTagliabue, M., Farrusseng, D., Valencia, S., Aguado, S., Ravon, U., Rizzo, C., … Mirodatos, C. (2009). Natural gas treating by selective adsorption: Material science and chemical engineering interplay. Chemical Engineering Journal, 155(3), 553-566. doi:10.1016/j.cej.2009.09.010P. A. Barrett and N. A.Stephenson, in Zeolites and Ordered Porous Solids: Fundamentals and Applications, ed. C. Martínez and J. Pérez-Pariente, Editorial Universitat Politècnica de València, Valencia, 2011, p. 149Bonenfant, D., Kharoune, M., Niquette, P., Mimeault, M., & Hausler, R. (2008). Advances in principal factors influencing carbon dioxide adsorption on zeolites. Science and Technology of Advanced Materials, 9(1), 013007. doi:10.1088/1468-6996/9/1/013007Dunne, J. A., Rao, M., Sircar, S., Gorte, R. J., & Myers, A. L. (1996). Calorimetric Heats of Adsorption and Adsorption Isotherms. 2. O2, N2, Ar, CO2, CH4, C2H6, and SF6on NaX, H-ZSM-5, and Na-ZSM-5 Zeolites. Langmuir, 12(24), 5896-5904. doi:10.1021/la960496rDelgado, J. A., Uguina, M. A., Gómez, J. M., & Ortega, L. (2006). Adsorption equilibrium of carbon dioxide, methane and nitrogen onto Na- and H-mordenite at high pressures. Separation and Purification Technology, 48(3), 223-228. doi:10.1016/j.seppur.2005.07.027Vansant, E. F., & Voets, R. (1981). Adsorption of binary gas mixtures in ion-exchanged forms of mordenite. Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, 77(6), 1371. doi:10.1039/f19817701371Llewellyn, P. L., & Maurin, G. (2007). Gas Adsorption in Zeolites and Related Materials. Introduction to Zeolite Science and Practice, 555-XVI. doi:10.1016/s0167-2991(07)80805-6Venna, S. R., & Carreon, M. A. (2008). Synthesis of SAPO-34 Crystals in the Presence of Crystal Growth Inhibitors. The Journal of Physical Chemistry B, 112(51), 16261-16265. doi:10.1021/jp809316sPalomino, M., Corma, A., Rey, F., & Valencia, S. (2010). New Insights on CO2−Methane Separation Using LTA Zeolites with Different Si/Al Ratios and a First Comparison with MOFs. Langmuir, 26(3), 1910-1917. doi:10.1021/la9026656Moon, J.-H., Bae, Y.-S., Hyun, S.-H., & Lee, C.-H. (2006). Equilibrium and kinetic characteristics of five single gases in a methyltriethoxysilane-templating silica/α-alumina composite membrane. Journal of Membrane Science, 285(1-2), 343-352. doi:10.1016/j.memsci.2006.09.003ROBSON, H. E., SHOEMAKER, D. P., OGILVIE, R. A., & MANOR, P. C. (1973). Synthesis and Crystal Structure of Zeolite Rho—A New Zeolite Related to Linde Type A. Molecular Sieves, 106-115. doi:10.1021/ba-1973-0121.ch009Chatelain, T., Patarin, J., Fousson, E., Soulard, M., Guth, J. L., & Schulz, P. (1995). Synthesis and characterization of high-silica zeolite RHO prepared in the presence of 18-crown-6 ether as organic template. Microporous Materials, 4(2-3), 231-238. doi:10.1016/0927-6513(95)00009-xHimeno, S., Tomita, T., Suzuki, K., & Yoshida, S. (2007). Characterization and selectivity for methane and carbon dioxide adsorption on the all-silica DD3R zeolite. Microporous and Mesoporous Materials, 98(1-3), 62-69. doi:10.1016/j.micromeso.2006.05.018Cavenati, S., Grande, C. A., & Rodrigues, A. E. (2004). Adsorption Equilibrium of Methane, Carbon Dioxide, and Nitrogen on Zeolite 13X at High Pressures. Journal of Chemical & Engineering Data, 49(4), 1095-1101. doi:10.1021/je0498917LI, S. (2004). SAPO-34 membranes for CO2/CH4 separation. Journal of Membrane Science, 241(1), 121-135. doi:10.1016/j.memsci.2004.04.027Van den Bergh, J., Zhu, W., Gascon, J., Moulijn, J. A., & Kapteijn, F. (2008). Separation and permeation characteristics of a DD3R zeolite membrane. 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Pure silica ITQ-32 zeolite allows separation of linear olefins from paraffins
[EN] ITQ-32 is able to separate propene from propane and represents a clear improvement with respect to previous zeolites in achieving the separation of trans-2-butene and 1-butene from the C(4) fraction using only one zeolite.Palomino Roca, M.; Cantin Sanz, A.; Corma Canós, A.; Leiva Herrero, S.; Rey Garcia, F.; Valencia Valencia, S. (2007). Pure silica ITQ-32 zeolite allows separation of linear olefins from paraffins. Chemical Communications. 12:1233-1235. doi:10.1039/b700358gS123312351
On stability and performance of highly c-oriented columnar AlPO4-5 and CoAPO-5 membranes
[EN] Continuous films comprised of highly c-oriented aluminophosphate AlPO4-5 or cobalt-substituted AlPO4-5 (CoAPO-5) were grown on porous supports and subjected to heat treatment in order to investigate the potential for membrane applications. A study in the early stages of in-plane crystalline intergrowth revealed a potential mechanism for flake-like crystal formation between the original oriented columnar crystals. Variations in metal substitution (AlPO4-5, CoAPO-5), support (glass, silicon, porous alumina), and calcination method (conventional, rapid thermal processing) were chosen to examine the conditions by which structural integrity was compromised following secondary (or tertiary) growth, resulting in reduced membrane functionality. Through the use of rapid thermal processing, the structure debilitation could be partially avoided. The membrane quality was inspected through pervaporation measurements consisting of a liquid hydrocarbon feed of n-heptane and 1,3,5-triisopropylbenzene. By investigating the effect of template removal on the oriented, columnar crystalline structure, useful insight is provided into the potential for the membranes to participate in applications such as molecular separations, catalysis, or host-guest assemblies. (C) 2011 Elsevier Inc. All rights reserved.Support by the American Chemical Society (ACS-PRF) and the European Community through the FP7 NextGTL project and a Marie Curie International Reintegration Grant (FP7, Grant agreement No. 210947) is greatly appreciated. M.P. thanks CSIC for a JAE doctoral fellowship. We would like to thank Kumar Varoon for assistance with membrane sectioning and imaging using the focused ion beam technique. Parts of this work were carried out in the Characterization Facility on the campus of the University of Minnesota-Twin Cities, which receives partial support from NSF through the MRSEC program.Stoeger, JA.; Veziri, CM.; Palomino Roca, M.; Corma Canós, A.; Kanellopoulos, NK.; Tsapatsis, M.; Karanikolos, GN. (2012). On stability and performance of highly c-oriented columnar AlPO4-5 and CoAPO-5 membranes. Microporous and Mesoporous Materials. 147(1):286-294. https://doi.org/10.1016/j.micromeso.2011.06.028286294147
Isostructural compartmentalized spin-crossover coordination polymers for gas confinement
[EN] Here we present two FeII coordination polymers that possess discrete compartments suitable for CO2 physisorption despite the lack of permanent channels. The two crystalline materials, of general formula [Fe(btzbp)3](X)2 (X = ClO4 or BF4), present voids of ca. 250 Å3, which each can accommodate up to two CO2 molecules. The abrupt spin transition can be modified upon CO2 sorption, and different magnetic behaviour is observed depending on the number of molecules sorbed.Financial support from the Spanish MINECO (CTQ2014-59209-P, MAT2014-56143-R and MAT2012-38567-C02-01), the Generalitat Valenciana (Prometeo and ISIC-Nano programs) and the VLC/Campus Program is gratefully acknowledged. We thank the Spanish government for the provision of a Severo Ochoa project (SEV-2012-0267) and a Maria de Maeztu project (MDM-2015-0538). G.M.E. acknowledges the Blaise Pascal International Chair for financial support. M.G.-M. thanks MICINN for a predoctoral FPU grant and the EU for a Marie Sklodowska-Curie postdoctoral fellowship (H2020-MSCA-IF-EF-658224). N.C.G. thanks the Generalitat Valenciana for a Val-i+d predoctoral fellowship. J. M. Martinez-Agudo and G. Agusti from the University of Valencia are gratefully acknowledged for magnetic measurements.Calvo Galve, N.; Giménez-Marqués, M.; Palomino Roca, M.; Valencia Valencia, S.; Rey Garcia, F.; Mínguez Espallargas, G.; Coronado, E. (2016). Isostructural compartmentalized spin-crossover coordination polymers for gas confinement. Inorganic Chemistry Frontiers. 3(6):808-813. https://doi.org/10.1039/C5QI00277JS80881336Hoskins, B. F., & Robson, R. (1989). Infinite polymeric frameworks consisting of three dimensionally linked rod-like segments. Journal of the American Chemical Society, 111(15), 5962-5964. doi:10.1021/ja00197a079Hoskins, B. F., & Robson, R. (1990). 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Unusually Low Heat of Adsorption of CO2 on AlPO and SAPO Molecular Sieves
[EN] The capture of CO2 from post-combustion streams or from other mixtures, such as natural gas, is an effective way of reducing CO2 emissions, which contribute to the greenhouse effect in the atmosphere. One of the developing technologies for this purpose is physisorption on selective solid adsorbents. The ideal adsorbents are selective toward CO2, have a large adsorption capacity at atmospheric pressure and are easily regenerated, resulting in high working capacity. Therefore, adsorbents combining molecular sieving properties and low heats of adsorption of CO2 are of clear interest as they will provide high selectivities and regenerabilities in CO2 separation process. Here we report that some aluminophosphate (AlPO) and silicoaluminophosphate (SAPO) materials with LTA, CHA and AFI structures present lower heats of adsorption of CO2 (13¿25 kJ/mol) than their structurally analogous zeolites at comparable framework charges. In some cases, their heats of adsorption are even lower than those of pure silica composition (20¿25 kJ/mol). This could mean a great improvement in the regeneration process compared to the most frequently used zeolitic adsorbents for this application while maintaining most of their adsorption capacity, if materials with the right stability and pore size and topology are found.We acknowledge the Spanish Ministry of Sciences, Innovation and Universities (MCIU), State Research Agency (AEI), and the European Fund for Regional Development (FEDER) for their funding via projects Multi2HYcat (EU-Horizon 2020 funded project under grant agreement no. 720783), Program Severo Ochoa SEV-2016-0683 and RTI2018-101033-B-I00 and also Fundacion Ramon Areces for funding through a research contract (CIVP18A3908). EP-B thanks the MCIU for his grant (FPU15/01602). NG-C thanks MCIU for her grant (BES-2016-078178).Pérez-Botella, E.; Martínez-Franco, R.; Gonzalez-Camuñas, N.; Cantin Sanz, A.; Palomino Roca, M.; Moliner Marin, M.; Valencia Valencia, S.... (2020). Unusually Low Heat of Adsorption of CO2 on AlPO and SAPO Molecular Sieves. Frontiers in Chemistry. 8:1-10. https://doi.org/10.3389/fchem.2020.588712S1108Bacsik, Z., Cheung, O., Vasiliev, P., & Hedin, N. (2016). Selective separation of CO2 and CH4 for biogas upgrading on zeolite NaKA and SAPO-56. Applied Energy, 162, 613-621. doi:10.1016/j.apenergy.2015.10.109BaerlocherC. H. McCuskerL. B. Database of Zeolite StructuresBoot-Handford, M. E., Abanades, J. C., Anthony, E. J., Blunt, M. J., Brandani, S., Mac Dowell, N., … Fennell, P. S. (2014). Carbon capture and storage update. Energy Environ. Sci., 7(1), 130-189. doi:10.1039/c3ee42350fBourgogneM. GuthJ.-L. WeyR. Process for the Preparation of Synthetic Zeolites, and Zeolites Obtained by Said Process1985Bui, M., Adjiman, C. 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Templateless Synthesis of Ultra-Microporous 3D Graphitic Carbon from Cyclodextrins and Their Use as Selective Catalyst for Oxygen Activation
[EN] Pyrolysis of alpha-, beta-, and gamma-cyclodextrins at 900 degrees C gives rise to the formation of crystalline graphitic porous nanoparticles (G(CD)), where the dimensions of the pores are uniform in the range from 0.63 to 0.97 nm, from G(alpha-CD) to G(gamma-CD), as determined by transmission electron microscopy. It is found that, while for G(beta-CD) and G(gamma-CD), the surface area measured by N-2 adsorption is about 330-550 m(2) g(-1), respectively, no area can be measured for G(alpha-CD) with N-2 or Ar due to its small pore dimensions. However, CO2 adsorption reveals for G(alpha-CD) the presence of ultra-microporosity and a surface area of 727 m(2) g(-1). G(CD) exhibits activity as metal-free catalysts for the aerobic oxidation of alcohols and the activity increases as the pore dimension decreases. Density functional theory calculations indicate that this high catalytic activity for O-2 activation derives from confinement effects that favor charge transfer from the graphitic walls to O-2. Studies on the formation mechanism shows that the key step leading to the formation of the channels is the melting of cyclodextrin precursors that makes possible the assembly of these capsules before their transformation into microporous graphitic particles.Financial support by the Spanish Ministry of Science and Innovation (Severo Ochoa and Grant No. RTI2018-890237-CO2-1) and Generalitat Valenciana (Prometeo Grant No. 2017-083) is gratefully acknowledged. A.R.P. thanks the Spanish Ministry of Education for a Ramon y Cajal research associate contract. S.N. thanks financial support by the Fundacion Ramon Areces (XVIII Concurso Nacional para la Adjudicacion de Ayudas a la Investigacion en Ciencias de la Vida y de la Materia, 2016), Ministerio de Ciencia, Innovacion y Universidades Grant No. RTI2018-099482-A-I00 project and Generalitat Valenciana grupos de investigacion consolidables 2019 (ref: Grant No. AICO/2019/214) project.Rendon-Patiño, A.; Santiago-Portillo, A.; Vallés-García, C.; Palomino Roca, M.; Navalón Oltra, S.; Franconetti, A.; Primo Arnau, AM.... (2020). Templateless Synthesis of Ultra-Microporous 3D Graphitic Carbon from Cyclodextrins and Their Use as Selective Catalyst for Oxygen Activation. Small Methods. 4(3):1-9. https://doi.org/10.1002/smtd.201900721S194
Cobalt(II) Bipyrazolate Metal-Organic Frameworks as Heterogeneous Catalysts in Cumene Aerobic Oxidation: A Tag-Dependent Selectivity
"This document is the Accepted Manuscript version of a Published Work that appeared in final form in Inorganic Chemistry, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acs.inorgchem.0c00481"[EN] Three metal-organic frameworks with the general formula Co(BPZX) (BPZX(2-) = 3-X-4,4'-bipyrazolate, X = H, NH2, NO2) constructed with ligands having different functional groups on the same skeleton have been employed as heterogeneous catalysts for aerobic liquid-phase oxidation of cumene with O-2 as oxidant. O-2 adsorption isotherms collected at p(O2) = 1 atm and T = 195 and 273 K have cast light on the relative affinity of these catalysts for dioxygen. The highest gas uptake at 195 K is found for Co(BPZ) (3.2 mmol/g (10.1 wt % O-2)), in line with its highest BET specific surface area (926 m(2)/g) in comparison with those of Co(BPZNH(2)) (317 m(2)/g) and Co(BPZNO(2)) (645 m(2)/g). The O-2 isosteric heat of adsorption (Q(2)) trend follows the order Co(BPZ) > Co(BPZNH(2)) > Co(BPZNO(2)). Interestingly, the selectivity in the cumene oxidation products was found to be dependent on the tag present in the catalyst linker: while cumene hydroperoxide (CHP) is the main product obtained with Co(BPZ) (84% selectivity to CHP after 7 h, p(O2) = 4 bar, and T = 363 K), further oxidation to 2-phenyl-2-propanol (PP) is observed in the presence of Co(BPZNH(2)) as the catalyst (69% selectivity to PP under the same experimental conditions).S.G., R.V., and M.M. acknowledge Universita dell'Insubria for partial funding. G.G. thanks the Italian MIUR through the PRIN 2017 Project Multi-e: Multielectron Transfer for the Conversion of Small Molecules: an Enabling Technology for the Chemical Use of Renewable Energy (20179337R7) for financial support. G.G. thanks the TRAINER project (Catalysts for Transition to Renewable Energy Future) ref. ANR-17-MPGA-0017 for support. C.P. thanks the University of Camerino and the Italian MIUR throughout the PRIN 2015 Project Towards a Sustainable Chemistry (20154 x 9ATP_002). This project has also received funding from the European Union's Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement No. 641887 (project acronym: DEFNET) and the Spanish Government through projects MAT2017-82288-C2-1-P and Severo Ochoa (SEV-2016-0683). Professor Norberto Masciocchi (University of Insubria, Como, Italy) is acknowledged for fruitful discussions. The authors are also grateful to Dr. Giulia Tuci (CNR-ICCOM Florence, Italy) for help with the XPS curve fitting. The Microscopy Service of the Universitat Politècnica de València is gratefully acknowledged for the electron microscopy measurements.Nowacka, AE.; Vismara, R.; Mercuri, G.; Moroni, M.; Palomino Roca, M.; Domasevitch, K.; Di Nicola, C.... (2020). Cobalt(II) Bipyrazolate Metal-Organic Frameworks as Heterogeneous Catalysts in Cumene Aerobic Oxidation: A Tag-Dependent Selectivity. Inorganic Chemistry. 59(12):8161-8172. https://doi.org/10.1021/acs.inorgchem.0c00481S816181725912Fortuin, J. P., & Waterman, H. I. (1953). Production of phenol from cumene. Chemical Engineering Science, 2(4), 182-192. doi:10.1016/0009-2509(53)80040-0Luyben, W. L. (2009). Design and Control of the Cumene Process. Industrial & Engineering Chemistry Research, 49(2), 719-734. doi:10.1021/ie9011535Matsui, S., & Fujita, T. (2001). New cumene-oxidation systems. 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