CeO 2 hollow nanosphere for catalytic synthesis of dimethyl carbonate from CO 2 and methanol: The effect of cavity effect on catalytic performance

2020 ◽  
Author(s):  
Jingyang Zhang ◽  
Shouying Huang ◽  
Yujun Zhao ◽  
Xinbin Ma ◽  
Shengping Wang
Keyword(s):  
Dimethyl Carbonate ◽  
Catalytic Performance ◽  
Catalytic Synthesis ◽  
Hollow Nanosphere ◽  
Cavity Effect

Catalytic synthesis of glycol dicarbonate from glycol and dimethyl carbonate by transesterification

2019 ◽  
Vol 43 (5-6) ◽  
pp. 211-216 ◽  
Author(s):  
Ruiyang Chen ◽  
Tong Chen ◽  
Xiaojia Hu ◽  
Youkun Fan ◽  
Gongying Wang
Keyword(s):  
Catalytic Activity ◽  
Dimethyl Carbonate ◽  
Reaction System ◽  
Catalytic Performance ◽  
Catalytic Synthesis ◽  
Catalyst Screening ◽  
Acidic Catalysts ◽  
Medium Strength ◽  
Basic Catalysts

Glycol dicarbonate is successfully synthesized via transesterification of glycol with dimethyl carbonate. A catalyst screening is performed by studying the effect of acidity and alkalinity on the catalytic performance. The results indicate that compared with acidic catalysts, high conversions and yields are obtained with basic catalysts. Ca(OH)2, with medium-strength alkalinity, exhibits excellent catalytic activity with glycol dicarbonate yields of 95%-99% when using a fractionation reaction system.

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.

Synthesis of Dimethyl Carbonate over Activated Carbon Supported Cu Based Catalysts

2014 ◽  
Vol 953-954 ◽  
pp. 1242-1245
Author(s):  
Wang Ruiyu ◽  
Li Zhong
Keyword(s):  
Activated Carbon ◽  
Vapor Phase ◽  
Dimethyl Carbonate ◽  
Catalytic Performance ◽  
Copper Salt ◽  
Precipitation Method ◽  
Catalyst Structure ◽  
Loading Amount ◽  
Copper Based Catalyst

The supported chloride-free copper based catalyst was prepared by deposition-precipitation method and used to catalyze the direct vapor-phase oxycarbonylation of methanol to dimethyl carbonate (DMC). The effect of reductive agent and copper salt precursor on catalyst structure and catalytic performance were investigated, the catalysts were characterized by XRD, H2-TPR techniques. Using Cu (CH3COO)2 as precursor, glucose as reductive agent, when loading amount was 17.1%, the Cu2O/AC catalyst shows the best performance for DMC synthesis. Under the condition of CO/MeOH/O2=5/11/1, SV=6625h-1, the average STY of DMC in 9 hrs running was 71.96mg/(g·h), and selectivity of DMC was 83.13%.

Catalytic Synthesis of Ethyl Acetate Using Ti2SnC

2013 ◽  
Vol 634-638 ◽  
pp. 628-631
Author(s):  
Yun Hui Long ◽  
Jun Ming Guo ◽  
Du Shu Huang ◽  
Gui Yang Liu
Keyword(s):  
Acetic Acid ◽  
Reaction Time ◽  
Ethyl Acetate ◽  
Reaction Temperature ◽  
Conversion Rate ◽  
Reaction System ◽  
Catalytic Performance ◽  
Catalytic Synthesis ◽  
Molar Ratio ◽  
The Ideal

The catalytic synthesis of ethyl acetate from ethanol and acetic acid using Ti2SnC in liquid phase under the atmospheric pressure was studied. The influences of some factors such as catalyst usage, initial reactant molar ratio, reaction temperature and reaction time on acetic acid conversion rate of this reaction system were investigated. The acetic acid conversion rate of 88.12% is achieved while the molar ratio of alcohol and acid is 1:3.6, the amount of catalyst is 0.2000 g, the reaction temperature is 80 °C and the reaction time is 30min. The catalyst Ti2SnC is the ideal catalyst for synthesis of ethyl acetate for good catalytic performance, non-corrosive to equipment, easily separated from product and used repeatedly.

Methoxycarbonylation of 1,6-hexanediamine with dimethyl carbonate to dimethylhexane-1,6-dicarbamate over Zn/SiO2 catalyst

RSC Advances ◽  
2016 ◽  
Vol 6 (56) ◽  
pp. 51446-51455 ◽  
Author(s):  
Lina Zhang ◽  
Hongguang Li ◽  
Feng Li ◽  
Yanfeng Pu ◽  
Ning Zhao ◽  
...  
Keyword(s):  
Dimethyl Carbonate ◽  
Catalytic Performance

The activated Zn(OAc)2 in Zn/SiO2 catalysts facilitates the activation of DMC which leads to better catalytic performance.

A Novel Energy Band Match Method and a Highly Efficient CuO–Co3O4@SiO2 Catalyst for Dimethyl Carbonate Synthesis from CO2

2021 ◽  
Vol 13 (1) ◽  
pp. 115-122
Author(s):  
Meng Zhang
Keyword(s):  
Energy Band ◽  
Dimethyl Carbonate ◽  
Materials Science ◽  
Catalytic Performance ◽  
Catalyst Design ◽  
Structure Calculation ◽  
Match Method ◽  
Matching Method ◽  
Catalyst Structure ◽  
Novel Method

The present research on dimethyl carbonate (DMC) synthesis from CO2 was short of effective theoretical guidance and catalyst design was also blind. A kind of regular relationship was found from catalyst structure calculation and activity experiments. Therefore, a novel energy band matching method was proposed. After substantial verification experiments, it was proved to be correct. Whether one certain catalyst has catalytic activity can be judged predictably according to this novel method. Novel and efficient catalysts can be designed or selected on the basis of designer's wishes. Based on this method, three efficient catalysts were prepared and CuO–Co3O4@SiO2 catalyst had the best catalytic performance. In a word, once it is applied in catalysts research, there will be a huge progress in catalysis and materials science fields.

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