首页|Non-oxidative propane dehydrogenation over Co/Ti-ZSM-5 catalysts:Ti species-tuned Co state and surface acidity
Non-oxidative propane dehydrogenation over Co/Ti-ZSM-5 catalysts:Ti species-tuned Co state and surface acidity
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NSTL
With the modified Ti-ZSM-5 zeolites as supports,the propane dehydrogenation(PDH)performance of the non-noble metal Co-based catalysts can be enhanced,which is benefited from the Ti species-tuned state of active Co species and surface acid property.The developed Co/Ti-ZSM-5 catalysts exhibit>95% C3H6 selectivity and good regeneration stability in the recycling PDH reactions.The characterization results illustrate the structural evolution of Ti from the framework and extra-framework Ti species to the small-size anatase TiO2 species with decreasing the Si/Ti ratio of the Ti-ZSM-5 zeolites,tailoring the dispersion and chemical state of the Co sites at different Co-zeolite or Co-TiO2 interfaces.The Ti-ZSM-5 zeolites with high Si/Ti ratios also show significantly reduced surface acidity especially the Br0nsted acidity in comparison with the Al-ZSM-5 zeolite,thus facilitating the C3H6 desorption for enhancing the selectivity and anti-coke stability.
NSTL
