Propylene,a pivotal chemical feedstock,is extensively used in synthesizing high-value derivatives such as polypropylene and acrylonitrile[1].Although propylene is predominantly produced via naphtha cracking,a persiste...Propylene,a pivotal chemical feedstock,is extensively used in synthesizing high-value derivatives such as polypropylene and acrylonitrile[1].Although propylene is predominantly produced via naphtha cracking,a persistent supply-demand gap exists[2].Non-oil routes,such as propane dehydrogenation(PDH),are increasingly attractive,particularly with the availability of shale gas[3].Modern non-oxidative PDH heavily relies on Pt nanoparticle catalysts promoted with SnOx(e.g.,PtSn/Al2O3 used in Honeywell UOP's Oleflex process)[4].However,these systems suffer from inherent limitations:high Pt costs,coke formation via deep dehydrogenation,and sintering during regeneration-necessitating environmentally detrimental oxychlorination treatments to restore activity[5].展开更多
文摘Propylene,a pivotal chemical feedstock,is extensively used in synthesizing high-value derivatives such as polypropylene and acrylonitrile[1].Although propylene is predominantly produced via naphtha cracking,a persistent supply-demand gap exists[2].Non-oil routes,such as propane dehydrogenation(PDH),are increasingly attractive,particularly with the availability of shale gas[3].Modern non-oxidative PDH heavily relies on Pt nanoparticle catalysts promoted with SnOx(e.g.,PtSn/Al2O3 used in Honeywell UOP's Oleflex process)[4].However,these systems suffer from inherent limitations:high Pt costs,coke formation via deep dehydrogenation,and sintering during regeneration-necessitating environmentally detrimental oxychlorination treatments to restore activity[5].
