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轻质烷烃广泛存在于天然气、炼厂气及油田气中,对其合理利用正日益引起重视。催化研究工作者试图通过研制合适的催化剂将其转化为更有用的化工原料,如烯烃或舍氧有机物等。丙烷氧化脱氢制丙烯是该研究的一部分。目前已报道的丙烷氧化脱氢催化剂大都是钒基催化剂,如V-Mg-O体系,但这些催化剂的选择性较差,特别是在转化率较高时其选择性更差。本文报道的纯稀土基催化剂采用新型活性中心调变剂和隔离剂,其组份少、热稳定性高,在高转化率时仍具有较好的选择性。
Light alkanes are widely present in natural gas, refinery gas and oilfield gas, and their rational utilization is gaining more and more attention. Catalysts Researchers try to convert them to more useful chemical materials, such as olefins or oxygen-laden organic compounds by developing suitable catalysts. Oxidative dehydrogenation of propane to propylene is part of this study. It has been reported that most of the oxidative dehydrogenation catalysts for propane are vanadium-based catalysts, such as V-Mg-O. However, these catalysts have poor selectivity, especially when the conversion is relatively high. The pure rare earth-based catalysts reported in this paper adopt a new type of active center modifier and release agent with less components, high thermal stability and good selectivity at high conversion rate.