Direct synthesis of dimethyl carbonate from CO₂and methanol over CaO–CeO₂catalysts: the role of acid–base properties and surface oxygen vacancies

Abstract

The addition of CaO to the CeO2 catalyst had a significant impact on the acid–base properties and amounts of oxygen vacancies on the surface catalyst.

Ionic‐Liquid‐Functionalized UiO‐66 Framework: An Experimental and Theoretical Study on the Cycloaddition of CO2 and Epoxides

“…[1] Efficient catalytic technologies that utilize CO 2 as carbon feedstock would be favorable for mitigating globalw arming. [4][5][6][7][8][9][10] Ap rominent CO 2 fixation method is the atom-efficient cycloadditiono fe poxides to CO 2 to produce industrially and economically importantf ive-membered cyclic carbonates. [4][5][6][7][8][9][10] Ap rominent CO 2 fixation method is the atom-efficient cycloadditiono fe poxides to CO 2 to produce industrially and economically importantf ive-membered cyclic carbonates.…”

“…[2,3] Compared to carbon capture and storage( CCS) techniques, carbon capturea nd utilization (CCU) techniques are more attractive, ast he captured CO 2 can be effectively converted to various valuable productss uch as urethanes, formic acid, dimethyl carbonate, and cyclic carbonates. [4][5][6][7][8][9][10] Ap rominent CO 2 fixation method is the atom-efficient cycloadditiono fe poxides to CO 2 to produce industrially and economically importantf ive-membered cyclic carbonates. [11][12][13][14][15][16][17][18][19][20] Cyclic carbonates are highly stable compounds; thus, long-term sequestration of CO 2 is possible.…”

CeO2 hollow nanosphere for catalytic synthesis of dimethyl carbonate from CO2 and methanol: The effect of cavity effect on catalytic performance

“…The process of the direct synthesis of DMC by using CO 2 and methanol as raw materials can reduce greenhouse gas emissions and utilize the abundant environmentally benign carbon feedstock, which is attractive and challenging 6,7 . In addition, it has high atomic efficiency and only water as a by‐product, which is in line with the concept of green chemical industry and a promising synthetic route 8–10 …”

Progress on Catalyst Development for Direct Synthesis of Dimethyl Carbonate from CO2 and Methanol

“…The mixed Ce/Ca ratio 1:1 demonstrated a higher catalytic activity over the 3:1 or 1:3 ratio which was a result of the acid/basic site density [76]. Moreover, the surface oxygen vacancies on the surface of the catalysts were investigated since the addition of different amounts of CaO could affect the structure and surface properties [77]. The acid-base properties and amount of surface oxygen vacancies on the surface of the catalysts were improved due to the interaction between CaO and CeO 2 , and the oxygen vacancies enhanced the adsorption of CO 2 .…”