Direct catalytic propane dehydrogenation(PDH)to obtain propylene is a more economical and environmentally friendly route for propylene production.In particular,alumina-supported Cr2O3 catalysts can have better potenti...Direct catalytic propane dehydrogenation(PDH)to obtain propylene is a more economical and environmentally friendly route for propylene production.In particular,alumina-supported Cr2O3 catalysts can have better potential applications if the acidic properties could be tuned.Herein,a series of rod-shaped porous alumina were prepared through a hydrothermal route,followed by calcination.It was found that the acidity of the synthesized alumina was generally lower than that of the commercial alumina and could be adjusted well by varying the calcination temperature.Such alumina materials were used as supports for active Cr2O3,and the obtained catalysts could enhance the resistance to coke formation associated with similar activity in PDH reaction compared to the commercial alumina.The amount of coke deposited on a self-made catalyst(Cr-Al-800)was 3.6%,which was much lower than that deposited on the reference catalyst(15.7%).The lower acidity of the catalyst inhibited the side reactions and coke formation during the PDH process,which was beneficial for its high activity and superior anti-coking properties.展开更多
基金supported by the National Natural Science Foundation of China(21733002)Joint Sino-German Research Project(2161101168)Cheung Kong Scholars Program of China(T2015036)~~
文摘Direct catalytic propane dehydrogenation(PDH)to obtain propylene is a more economical and environmentally friendly route for propylene production.In particular,alumina-supported Cr2O3 catalysts can have better potential applications if the acidic properties could be tuned.Herein,a series of rod-shaped porous alumina were prepared through a hydrothermal route,followed by calcination.It was found that the acidity of the synthesized alumina was generally lower than that of the commercial alumina and could be adjusted well by varying the calcination temperature.Such alumina materials were used as supports for active Cr2O3,and the obtained catalysts could enhance the resistance to coke formation associated with similar activity in PDH reaction compared to the commercial alumina.The amount of coke deposited on a self-made catalyst(Cr-Al-800)was 3.6%,which was much lower than that deposited on the reference catalyst(15.7%).The lower acidity of the catalyst inhibited the side reactions and coke formation during the PDH process,which was beneficial for its high activity and superior anti-coking properties.
