10 research outputs found
Chemistry of (octaethylporphyrinato)lutetium and -yttrium complexes: synthesis and reactivity of (OEP)MX derivatives and the selective activation of O2 by (OEP)Y(.mu.-Me)2AlMe2
No full textEthylene Bis(2-indenyl) Zirconocenes: A New Class of Diastereomeric Metallocenes for the (Co)Polymerization of α-Olefins
No full textC-H bonds are not elongated by coordination to lanthanide metals: Single-crystal neutron diffraction structures of (C5Me5)Y(OC6H3(t)Bu2)CH(SiMe3)2 at 20 K and (C5Me5)LaCH(SiMe3)22 at 15 K [2]
No full textProduction of clean transportation fuels and lower olefins from Fischer-Tropsch synthesis waxes under fluid catalytic cracking conditions. The potential of highly paraffinic feedstocks for FCC
No full textPhosphorus-bridged metallocenes: New homogeneous catalysts for the polymerization of propene
No full textReactions of co-ordinated ligands. Part 37. Synthesis and structure of the dimolybdenum µ-allylidene complex [Mo<sub>2</sub>(µ-σ:η<sup>3</sup>-CHCHCMe<sub>2</sub>)(CO)<sub>4</sub>(η-C<sub>5</sub>H<sub>5</sub>)<sub>2</sub>]; formation and crystal structure of the oxo-µ-allylidene complex [Mo<sub>2</sub>O(µ-σ:η<sup>3</sup>-CHCHCMe<sub>2</sub>)(µ-CO)(CO)(η-C<sub>5</sub>H<sub>5</sub>)<sub>2</sub>]. Thermal rearrangement to alkyne and 1,3-diene dimolybdenum species and structure of [Mo<sub>3</sub>(µ<sub>3</sub>-η<sup>4</sup>-CCHCMeCH)(CO)<sub>4</sub>(η-C<sub>5</sub>H<sub>5</sub>)<sub>3</sub>]
No full textRhodium alkoxide complexes : formation of an unusually strong intermolecular hydrogen bond in (PMe3)3Rh-Otol(HOtol)
No full textMonocyclopentadienyl Yttrium Chemistry: Incorporation of Alkoxides as Supporting Ligands and Synthesis of [Y(C5Me5)(OC6H3But2)(μ-H)]2
No full textReaction of the crystallographically characterised [Y(C5Me5)(OC6H3But2)2] 2 with LiCH(SiMe3)2 affords the mixed alkyl-alkoxide species [Y(C5Me5){CH(SiMe3)2}(OC6H3But2)] 3 which, on subsequent hydrogenation, gives the hydride bridged dimer [{Y(C5Me5)(OC6H3But2)(μ-H)}2] 4; 89Y NMR spectra of these, and related complexes, allows C5Me5, OC6H3But2 and CH(SiMe3)2 group contributions to be determined.
Hydrodeoxygenation of pyrolysis oil fractions: process understanding and quality assessment through co-processing in refinery units
Get PDF3 Mercader, Ferran de Miguel Groeneveld, Michiel J. Kersten, Sascha R. A. Geantet, Christophe Toussaint, Guy Way, Nico W. J. Schaverien, Colin J. Hogendoorn, Kees J. A.Hydrodeoxygenation (HDO) of pyrolysis oil fractions was studied to better understand the HDO of whole pyrolysis oil and to assess the possibility to use individual upgrading routes for these fractions. By mixing pyrolysis oil and water in a 2 : 1 weight ratio, two fractions were obtained: an oil fraction (OFWA) containing 32 wt% of the organics from the whole oil and an aqueous fraction water addition (AFWA) with the remaining organics. These fractions (and also the whole pyrolysis oil as the reference) were treated under HDO conditions at different temperatures (220, 270 and 310 degrees C), a constant total pressure of 190 bar, and using 5 wt% Ru/C catalyst. An oil product phase was obtained from all the feedstocks; even from AFWA, 29 wt% oil yield was obtained. Quality parameters (such as coking tendency and H/C) for the resulting HDO oils differed considerably, with the quality of the oil from AFWA being the highest. These HDO oils were evaluated by co-processing with an excess of fossil feeds in catalytic cracking and hydrodesulfurisation (HDS) lab-scale units. All co-processing experiments were successfully conducted without operational problems. Despite the quality differences of the (pure) HDO oils, the product yields upon catalytic cracking of their blends with Long Residue were similar. During co-processing of HDO oils and straight run gas oil in a HDS unit, competition between HDS and HDO reactions was observed without permanent catalyst deactivation. The resulting molecular weight distribution of the co-processed HDO/fossil oil was similar to when hydrotreating only fossil oil and independent of the origin of the HDO oil
Hydrodeoxygenation of pyrolysis oil fractions: process understanding and quality assessment through co-processing in refinery units
No full textHydrodeoxygenation (HDO) of pyrolysis oil fractions was studied to better understand the HDO of whole pyrolysis oil and to assess the possibility to use individual upgrading routes for these fractions. By mixing pyrolysis oil and water in a 2:1 weight ratio, two fractions were obtained: an oil fraction (OFWA) containing 32 wt% of the organics from the whole oil and an aqueous fraction water addition (AFWA) with the remaining organics. These fractions (and also the whole pyrolysis oil as the reference) were treated under HDO conditions at different temperatures (220, 270 and 310 °C), a constant total pressure of 190 bar, and using 5 wt% Ru/C catalyst. An oil product phase was obtained from all the feedstocks; even from AFWA, 29 wt% oil yield was obtained. Quality parameters (such as coking tendency and H/C) for the resulting HDO oils differed considerably, with the quality of the oil from AFWA being the highest. These HDO oils were evaluated by co-processing with an excess of fossil feeds in catalytic cracking and hydrodesulfurisation (HDS) lab-scale units. All co-processing experiments were successfully conducted without operational problems. Despite the quality differences of the (pure) HDO oils, the product yields upon catalytic cracking of their blends with Long Residue were similar. During co-processing of HDO oils and straight run gas oil in a HDS unit, competition between HDS and HDO reactions was observed without permanent catalyst deactivation. The resulting molecular weight distribution of the co-processed HDO/fossil oil was similar to when hydrotreating only fossil oil and independent of the origin of the HDO oil
