Affiliation:
1. Henan Key Laboratory of Polyoxometalate Chemistry College of Chemistry and Chemical Engineering Henan University Kaifeng 475004 Henan China
2. Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 Liaoning China
Abstract
AbstractAmong many ethylene glycol (EG) synthetic methods, the ethylene carbonate (EC) route is preferred due to its extremely high EG selectivity and low H2O/EC ratio. In this work, a variety of layered double hydroxides (LDHs) and layered double oxides (LDOs) were synthesized by the co‐precipitation method and evaluated as catalysts for this reaction. The Zn3Al‐LDO showed the highest catalytic activity under low H2O/EC ratio and mild conditions, and the EG yield of 93 %–99 % could be obtained at 100 °C for 3–4 h. This superior performance is attributed to the absence of the “memory effect”, allowing Zn3Al‐LDO to retain a significant number of base sites in the hydrolysis system. The active sites inhibition experiment proved that Zn3Al‐LDO is an acid‐base synergistic catalyst and the base sites are dominant. The catalyst can be recycled at least five times with calcination and activation to maintain excellent catalytic activity.
Funder
National Natural Science Foundation of China
Dalian Institute of Chemical Physics
Subject
Inorganic Chemistry,Organic Chemistry,Physical and Theoretical Chemistry,Catalysis
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