Analysis of direct synthesis of dimethyl carbonate from methanol and CO 2 intensified by in-situ hydration-assisted reactive distillation with side reactor

2018 ◽  
Vol 129 ◽  
pp. 109-117 ◽  
Author(s):  
Xutao Hu ◽  
Hongye Cheng ◽  
Xueqing Kang ◽  
Lifang Chen ◽  
Xigang Yuan ◽  
...  
Keyword(s):  
Dimethyl Carbonate ◽  
Reactive Distillation ◽  
Direct Synthesis

scholarly journals Comment on “CO2 Utilization Feasibility Study: Dimethyl Carbonate Direct Synthesis Process with Dehydration Reactive Distillation”

2020 ◽  
Vol 59 (34) ◽  
pp. 15387-15389 ◽  
Author(s):  
Daniel C. Redeker ◽  
Daniel Y. Jiang ◽  
Jesse S. Kullar ◽  
Vincent Leung ◽  
Ahmet Palazoglu ◽  
...  
Keyword(s):  
Feasibility Study ◽  
Dimethyl Carbonate ◽  
Reactive Distillation ◽  
Direct Synthesis ◽  
Synthesis Process ◽  
Co2 Utilization

scholarly journals Effect of In-Situ Dehydration on Activity and Stability of Cu–Ni–K2O/Diatomite as Catalyst for Direct Synthesis of Dimethyl Carbonate

Catalysts ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 343 ◽  
Author(s):  
Dongmei Han ◽  
Yong Chen ◽  
Shuanjin Wang ◽  
Min Xiao ◽  
Yixin Lu ◽  
...  
Keyword(s):  
Dimethyl Carbonate ◽  
Direct Synthesis ◽  
Fixed Bed ◽  
Reaction System ◽  
Space Velocity ◽  
Trapping Efficiency ◽  
Gas Space ◽  
Water Trapping ◽  
Reaction Equilibrium

An in-situ dehydrating system built in a continuous flow fixed-bed bubbling reactor for direct synthesis of dimethyl carbonate (DMC) was designed. 3A molecular sieve (MS) was selected as the ideal dehydrating agent and the water trapping efficiency was studied. The effect of dehydrating agent/catalyst ratio, the dehydrating temperature and pressure, as well as the space velocity on the direct DMC synthesis catalyzed by K2O-promoted Cu–Ni was further investigated. These results demonstrated that 3A MS could effectively dehydrate the reaction system at the optimal conditions of 120 °C and 1.0 MPa with gas space velocity (GHSV) of 600 h−1, thereby greatly shifting the reaction equilibrium toward high DMC yield. Higher DMC yield of 13% was achieved compared with undehydrated reaction. Moreover, the catalyst can be highly stabilized by 3A MS dehydration with stable performs over 22 h.

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.

Direct Synthesis of Cubic ZrMo2O8Followed by Ultrafast In Situ Powder Diffraction

2009 ◽  
Vol 131 (48) ◽  
pp. 17560-17562 ◽  
Author(s):  
Jennifer E. Readman ◽  
Sarah E. Lister ◽  
Lars Peters ◽  
Jon Wright ◽  
John S. O. Evans
Keyword(s):  
Powder Diffraction ◽  
Direct Synthesis

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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