Dehydrogenation of propane to propylene over zinc oxide catalysts supported on steaming-treated HZSM-5 in the presence of CO2 has been investigated. The highest catalytic performance can be achieved on the 5%ZnO/HZSM-...Dehydrogenation of propane to propylene over zinc oxide catalysts supported on steaming-treated HZSM-5 in the presence of CO2 has been investigated. The highest catalytic performance can be achieved on the 5%ZnO/HZSM-5（650） catalyst with the HZSM-5 support steaming at 650 ~C, which allows the maximum propyl- ene yields of 29.7% and 20.3% at the initial and steady states, respectively, in the catalytic dehydrogenation of pro- pane at 600 ~C. The superior catalytic performance of this catalyst can be attributed to high dispersion of ZnO and appropriate Bronsted acidity of the HZSM-5（650） support. The catalytic stability is enhanced by the addition of CO2 to the feed gas due to the suppression of coke formation.展开更多
文摘Dehydrogenation of propane to propylene over zinc oxide catalysts supported on steaming-treated HZSM-5 in the presence of CO2 has been investigated. The highest catalytic performance can be achieved on the 5%ZnO/HZSM-5（650） catalyst with the HZSM-5 support steaming at 650 ~C, which allows the maximum propyl- ene yields of 29.7% and 20.3% at the initial and steady states, respectively, in the catalytic dehydrogenation of pro- pane at 600 ~C. The superior catalytic performance of this catalyst can be attributed to high dispersion of ZnO and appropriate Bronsted acidity of the HZSM-5（650） support. The catalytic stability is enhanced by the addition of CO2 to the feed gas due to the suppression of coke formation.
