Catalytic Activity of Alkali Metal Salts Supported on Perovskite Type Oxide for Carbonaceous Materials Combustion

2020 ◽  
pp. 269-288
Author(s):  
Isao Mochida ◽  
Tatsuro Miyazaki ◽  
Kinya Sakanishi
Keyword(s):  
Catalytic Activity ◽  
Alkali Metal ◽  
Metal Salts ◽  
Carbonaceous Materials ◽  
Alkali Metal Salts ◽  
Perovskite Type Oxide ◽  
Perovskite Type

Coupling reaction of epoxide and carbon dioxide catalysed by alkali metal salts in the presence of ß-cyclodextrin derivatives

2017 ◽  
Vol 14 (2) ◽  
pp. 159-164 ◽  
Author(s):  
Zhang Guangqing ◽  
Shenjun Qin ◽  
Li Zhen ◽  
Han Haiyan ◽  
Li Hui ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Alkali Metal ◽  
Synergetic Effect ◽  
Coupling Reaction ◽  
Metal Salts ◽  
High Catalytic Activity ◽  
Cyclic Carbonates ◽  
Alkali Metal Salts ◽  
Content Type ◽  
Co Catalysts

Purpose This study aims to investigate the coupling reaction of epoxide and CO2 catalysed by alkali metal salts in the presence of ß-cyclodextrin (ß-CD) derivatives to generate cyclic carbonates at various conditions. Design/methodology/approach The coupling reaction was catalysed by alkali metal salts. The effects of the co-catalysts were investigated by using the conversion rate of raw materials. The affecting factors, such as reaction temperature, amount of the co-catalyst and reaction time, were explored. The possible mechanism of the coupling reaction was discussed. Findings Results showed that the structure of ß-CD is an important factor influencing the catalytic activity for the coupling reaction of epoxide with CO2. The catalytic system of 2,3,6-trimethyl-ß-CD with potassium iodide (KI) showed a high catalytic activity. The protocol was expanded to various epoxides, which provided the corresponding cyclic carbonates in excellent yields. The apparent decrease in the yields was not detected after four recycling times. Moreover, the mechanism for the synergetic effect of the catalyst was proposed. Originality/value The coupling reactions were achieved in the presence of different structure of ß-CD as co-catalysts. The affecting of substituent of ß-CD were investigated.

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