首页> 中文期刊> 《天然气技术与经济》 >甲醇和二甲醚在Fe-ZSM-5催化剂上转化制汽油的异同

甲醇和二甲醚在Fe-ZSM-5催化剂上转化制汽油的异同

         

摘要

Synthesis of gasoline using dimethyl ether (DME) and methanol as feedstock, respectively, over an in-situ synthesized Fe-ZSM-5 catalyst was investigated. The results indicated that different reactant had different gasoline yield, gasoline quality and catalyst lifetime. Using methanol and DME as the reactant, the highest gasoline mass yield was 29.7%and 35.4%, respectively. The oil quality was different for different reactant because of their different aromatics distribution, and the catalyst lifetime was about 40%longer for methanol feedstock than that for DME feedstock, which was attribute to the difference of reaction rate for the two reactants and the formation of water when using methanol as feedstock having an additional hydrothermal effect to the catalyst and inhibiting coke formation.%分别以二甲醚和甲醇为原料对原位合成Fe-ZSM-5催化剂进行了制汽油评价。结果表明以这两种原料制汽油有着不同的油收率、油品质和催化剂寿命。以甲醇和二甲醚为原料时最高油收率分别为29.7%和35.4%,油品质的不同表现为相同时间段的产品油芳烃分布不同,以甲醇为原料时催化剂寿命比以二甲醚为原料时高40%左右。这可能是由于两反应有不同的反应速率常数,甲醇脱水对分子筛催化剂的水热反应和额外的水对催化剂积炭的抑制等因素造成的。

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