23 research outputs found
The approaches to create and realization the strategy of environmental and economic development of the region
У роботі запропоновані підходи до формування та реалізації стратегії еколого-економічного розвитку регіону, а також індикатори оцінки ефективності стратегії еколого-економічного розвитку регіону.В работе предложены подходы к формированию и реализации стратегии эколого-экономического развития региона, а также индикаторы оценки эффективности стратегии эколого-экономического развития региона.In this paper proposes approaches to the formation and implementation the strategy of environmental-economic development of the region. Also provides indicators to measure the strategy effectiveness of environmental-economic development of the region
The approaches to create and realization the strategy of environmental and economic development of the region
У роботі запропоновані підходи до формування та реалізації стратегії еколого-економічного розвитку регіону, а також індикатори оцінки ефективності стратегії еколого-економічного розвитку регіону.В работе предложены подходы к формированию и реализации стратегии эколого-экономического развития региона, а также индикаторы оценки эффективности стратегии эколого-экономического развития региона.In this paper proposes approaches to the formation and implementation the strategy of environmental-economic development of the region. Also provides indicators to measure the strategy effectiveness of environmental-economic development of the region
Metal-ceramic composites for photocatalytic oxidation of diclofenac in aqueous solution
Photocatalytic activity of metal‐ceramic composites synthesized by self‐propagating high‐temperature synthesis (SHS) is investigated in the processes of degradation of diclofenac (DCF). Optical properties of the composites were studied, and the band gaps of ceramic matrix semiconducting components were calculated from the absorbance spectra. The effect of the phase composition, UV irradiation duration, the nature and quantity of the activator (H2C2O4 and H2O2) on the degree of oxidation destruction was investigated. The best catalytic performance (98–99 % DCF degradation) was achieved with the combination of heterogeneous boron nitride and SiAlON based composites and a homogeneous photo‐Fenton system. However, DCF decomposition with a minimum number of intermediates was achieved using boron nitride‐based composites. Effective degradation of diclofenac in water! Iron‐containing composites capable of absorbing UV radiation and creating conditions in the presence of hydrogen peroxide and oxalic acid for homogeneous photocatalysis are proposed. Deep degradation occurs with simultaneous oxidative destruction processes of diclofenac according to the principle of heterogeneous and homogeneous photocatalysis
Challenges in the Greener Production of Formates/Formic Acid, Methanol, and DME by Heterogeneously Catalyzed CO2 Hydrogenation Processes
The recent advances in the development of heterogeneous catalysts and processes for the direct hydrogenation of CO2 to formate/formic acid, methanol, and dimethyl ether are thoroughly reviewed, with special emphasis on thermodynamics and catalyst design considerations. After introducing the main motivation for the development of such processes, we first summarize the most important aspects of CO2 capture and green routes to produce H2. Once the scene in terms of feedstocks is introduced, we carefully summarize the state of the art in the development of heterogeneous catalysts for these important hydrogenation reactions. Finally, in an attempt to give an order of magnitude regarding CO2 valorization, we critically assess economical aspects of the production of methanol and DME and outline future research and development directions
Cover picture: Shaping covalent triazine frameworks for the hydrogenation of Carbon Dioxide to Formic Acid (ChemCatChem 13/2016)
The Front Cover shows a formation of covalent triazine framework (CTF) based spheres using commercially available polyimide as a binder. In their Full Paper, A. V. Bavykina et al. present a facile one‐step method to shape CTFs into composite spheres with accessible porosity, high mechanical, and thermal stability. They used the fabricated spheres to host organometallic IrIII complex and obtained a catalyst, which is active and fully recyclable in the direct hydrogenation of carbon dioxide into formic acid. More information can be found in the Full Paper by A. V. Bavykina et al. on page 2217 in Issue 13
Shaping covalent triazine framework for the hydrogenation of carbon dioxide to formic acid
The front cover artwork for Issue 13/2016 is provided by researchers from the Catalysis Engineering group, Chemical Engineering Department, Delft University of Technology (The Netherlands). The image shows the formation of covalent triazine framework (CTF) based spheres by using commercially available polyimide as a binder. See the Full Paper itself at http://dx.doi.org/10.1002/cctc.201600419
Metal–Organic Frameworks in Heterogeneous Catalysis: Recent Progress, New Trends, and Future Perspectives
Turning a Methanation Catalyst into a Methanol Producer: In-Co Catalysts for the Direct Hydrogenation of CO2 to Methanol
The direct hydrogenation of CO2 to methanol using green hydrogen is
regarded as a potential technology to reduce greenhouse gas emissions and the
dependence on fossil fuels. For this technology to become feasible, highly selective
and productive catalysts that can operate under a wide range of reaction conditions
near thermodynamic conversion are required. Here, we demonstrate that indium in
close contact with cobalt catalyses the formation of methanol from CO2 with high
selectivity (>80%) and productivity (0.86 gCH3OH.gcatalyst-1.h-1) at conversion levels close
to thermodynamic equilibrium, even at temperatures as high as 300 °C and at
moderate pressures (50 bar). The studied In@Co system, obtained via co-
precipitation, undergoes in situ transformation under the reaction conditions to form
the active phase. Extensive characterization demonstrates that the active catalyst is
composed of a mixed metal carbide (Co3InC0.75), indium oxide (In2O3) and metallic Co.
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Molecular-Scale Hybrid Membranes Derived from Metal-Organic Polyhedra for Gas Separation
Metal–Organic Framework-Derived Synthesis of Cobalt Indium Catalysts for the Hydrogenation of CO 2 to Methanol
International audienceMethanol synthesis by means of direct CO2 hydrogenation has the potential to contribute to climate change mitigation by turning the most important greenhouse gas into a commodity. However, for this process to become industrially relevant, catalytic systems with improved activity, selectivity, and stability are required. Here, we explore the potential of metal–organic frameworks (MOFs) as precursors for synthesis of Co3O4-supported In2O3 oxide composites for the direct CO2 hydrogenation to methanol. Stepwise pyrolytic-oxidative decomposition of indium-impregnated ZIF-67(Co) MOFs affords the formation of a nanostructured In2O3@Co3O4 reticulated shell composite material able to reach a maximum methanol production rate of 0.65 gMeOH·gcat–1·h–1 with selectivity as high as 87% over 100 h on stream. Textural characteristics of the sacrificial ZIF-67(Co) matrix and In-loading were found to be important variables for optimizing the catalyst performance such as induction time, methanol productivity, and selectivity. The structural investigation on the catalytic system reveals that the catalyst undergoes reorganization under reaction conditions, transforming from Co3O4 with an amorphous In2O3 shell into Co3InC0.75 covered by a layer consisting of a mixture of amorphous CoOx and In2O3 oxides. Structural reorganization is responsible for the observed induction period, while the amorphous mixed cobalt indium oxide shell is responsible for the high methanol yield and selectivity. Additionally, these results demonstrate the tunable performance of MOF-derived In2O3@Co3O4 catalysts as a function of the reaction conditions which allows us to establish a reasonable trade-off between high methanol yield and selectivity in a wide temperature and pressure window