【摘要】 采用脉冲微反-色谱在线分析装置,考察了GOR-Ⅱ、RGD、β沸石、SAPO-34和ZRP-55种不同催化剂对甲醇转化反应的影响。结果表明,小孔径、B酸酸性适度弱的催化剂可以抑制氢转移反应、聚合和芳构化反应的进行,获得较好的低碳烯烃选择性。同时对SAPO-34催化剂,研究了反应温度、甲醇水溶液浓度对甲醇转化反应的影响。结果表明:反应温度的升高有利于抑制氢转移反应和促进大分子产物的裂化反应,但同时会使甲烷选择性增加过快,低碳烯烃选择性先增后降,在450℃时达到最大值;原料中水的加入抑制了氢转移反应、聚合和芳构化反应,同时对甲烷的生成也起到了抑制作用,随着甲醇浓度的降低,低碳烯烃选择性不断增加。更多还原

【Abstract】 Effects of different catalysts (GOR-Ⅱ,RGD,β zeolite,SAPO-34 and ZRP-5) on the reaction of methanol to light olefins were studied with pulse-micro-reactor gas chromatograph equipment.The results showed that catalyst with micropore and suitable weak B acidity has low ability of alkene hydrogen transfer,polymerization and dehydrocyclization-aromatization and has high light olefins selectivity.The effects of reaction conditions on methanol to olefins were investigated over SAPO-34 catalyst.High reaction temperature inhibited alkene hydrogen transfer reaction and improved long chain hydrocarbon cracking reaction.As reaction temperature increased,methane selectivity increased rapidly,but light olefins selectivity firstly increased,then decreased and got the maximum at 450℃.As water content in feedstock increased,alkene hydrogen transfer,polymerization and dehydrocyclization-aromatization were inhibited,and methane selectivity decreased,but light olefins selectivity increased.更多还原