Cr-MCM-41 for selective dehydrogenation of lower alkanes with carbon dioxide

摘要

Cr-MCM-41 synthesized by both direct hydrothermal (DHT) and template-ion exchange (TIE) methods is studied for dehydrogenation of lower alkanes including C_2H_6, C_3H_8 and i-C_4H_(10) with CO_2. Both methods lead to Cr species highly dispersed on the wall surface of MCM-41 and exhibited similar catalytic behaviors. Selectivity higher than 90% to each alkene has been achieved, and the presence of CO_2 enhances the conversion of alkane.