Modeling of physical and chemical equilibrium for the direct synthesis of dimethyl carbonate at high pressure conditions

2012 ◽  
Vol 336 ◽  
pp. 41-51 ◽  
Author(s):  
B.A.V. Santos ◽  
V.M.T.M. Silva ◽  
J.M. Loureiro ◽  
D. Barbosa ◽  
A.E. Rodrigues
Keyword(s):  
High Pressure ◽  
Chemical Equilibrium ◽  
Dimethyl Carbonate ◽  
Direct Synthesis ◽  
Physical And Chemical

Kinetic study for the direct synthesis of dimethyl carbonate from methanol and CO2 over CeO2 at high pressure conditions

2013 ◽  
Vol 455 ◽  
pp. 219-226 ◽  
Author(s):  
B.A.V. Santos ◽  
C.S.M. Pereira ◽  
V.M.T.M. Silva ◽  
J.M. Loureiro ◽  
A.E. Rodrigues
Keyword(s):  
High Pressure ◽  
Kinetic Study ◽  
Dimethyl Carbonate ◽  
Direct Synthesis

Modeling of Chemical Equilibrium and Gas Phase Behavior for the Direct Synthesis of Dimethyl Carbonate from CO2and Methanol

2012 ◽  
Vol 51 (26) ◽  
pp. 8945-8956 ◽  
Author(s):  
Felipe Bustamante ◽  
Andrés F. Orrego ◽  
Sebastián Villegas ◽  
Aída L. Villa
Keyword(s):  
Phase Behavior ◽  
Gas Phase ◽  
Chemical Equilibrium ◽  
Dimethyl Carbonate ◽  
Direct Synthesis

Direct synthesis of tetraalkoxysilanes in a high-pressure mechanochemical reactor.

2022 ◽  
Author(s):  
Ilya Krizhanovskiy ◽  
Maxim Temnikov ◽  
Anton Anisimov ◽  
Andrey Ratnikov ◽  
Ivan S Levin ◽  
...  
Keyword(s):  
High Pressure ◽  
Direct Synthesis

We report the results of studies on the direct synthesis of tetraalkoxysilanes from alcohols and metallic silicon in a high-pressure mechanochemical reactor. The effect of the following factors on the...

scholarly journals Gas phase synthesis of dimethyl carbonate from CO2 and CH3OH over Cu-Ni/AC. A kinetic study

2019 ◽  
pp. 88-99 ◽  
Author(s):  
Oscar Felipe Arbeláez-Pérez ◽  
Sara Dominguez Cardozo ◽  
Andrés Felipe Orrego-Romero ◽  
Aida Luz Villa Holguin ◽  
Felipe Bustamante Londoño
Keyword(s):  
Carbon Dioxide ◽  
Catalytic Activity ◽  
Activated Carbon ◽  
Gas Phase ◽  
Dimethyl Carbonate ◽  
Direct Synthesis ◽  
Dispersion Analysis ◽  
Molar Ratio ◽  
Rate Determining Step ◽  
Carbonate Formation

The catalytic activity for dimethyl carbonate formation from carbon dioxide and methanol over mono and bimetallic Cu:Ni supported on activated carbon is presented. Bimetallic catalysts exhibit higher catalytic activity than the monometallic samples, being Cu:Ni-2:1 (molar ratio) the best catalyst; X-Ray diffraction, transmission electron microscopy, and metal dispersion analysis provided insight into the improved activity. In situ FT-IR experiments were conducted to investigate the mechanism of formation of dimethyl carbonate from methanol and carbon dioxide over Cu-Ni:2-1. The kinetics of the direct synthesis of dimethyl carbonate in gas phase over Cu:Ni-2:1 supported on activated carbon catalyst was experimentally investigated at 12 bar and temperatures between 90 oC and 130 oC, varying the partial pressures of CO2 and methanol. Experimental kinetic data were consistent with a Langmuir–Hinshelwood model that included carbon dioxide and methanol adsorption on catalyst actives sites (Cu, Ni and Cu-Ni), and the reaction of adsorbed CO2 with methoxi species as the rate determining step. The estimated apparent activation energy was 94.2 kJ mol-1.

Oxidative Carbonylation of Methanol to Dimethyl Carbonate by Chlorine-Free Homogeneous and Immobilized 2,2'-Bipyrimidine Modified Copper Catalyst

2007 ◽  
Vol 72 (8) ◽  
pp. 1094-1106 ◽  
Author(s):  
Szilárd Csihony ◽  
László T. Mika ◽  
Gábor Vlád ◽  
Katalin Barta ◽  
Christian P. Mehnert ◽  
...  
Keyword(s):  
High Pressure ◽  
Dimethyl Carbonate ◽  
Copper Catalyst ◽  
Catalytic Performance ◽  
Spectroscopic Studies ◽  
Oxidative Carbonylation ◽  
Cu Catalyst

A chlorine-free catalyst, prepared in situ from Cu(II) acetate and 2,2'-bipyrimidine, can be used for the oxidative carbonylation of methanol to dimethyl carbonate. In situ high pressure IR and NMR spectroscopic studies suggest the formation of [Cu(2,2'-bipyrimidine)(CO)- (OMe)] as one of the key intermediates. The catalytic performance of the 2,2'-bipyrimidine-modified Cu-catalyst is similar to the CuCl-based system. The chlorine free catalyst can be immobilized by using the copolymer of 5-vinyl-2,2'-bipyrimidine and styrene.

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