扩孔剂对β沸石催化剂FCC轻汽油醚化性能的影响

制备了催化裂化轻汽油β分子筛醚化催化剂。在小型连续流动固定床反应装置进行了催化裂化轻汽油的醚化反应。考察了催化剂成型过程中，不同分子量和不同质量分数的聚乙二醇(PEG) 、浸渍氧化物方式、挤条成型与浸渍先后顺序对Hβ沸石的醚化反应活性影响, 同时还考察了醚化反应温度、压力、醇烯比和空速对醚化反应的影响。实验结果表明，添加质量分数为10%的扩孔剂PEG-4000成型，再共同浸渍氧化物制备的Hβ分子筛催化剂具有最佳的醚化反应活性。在最佳反应条件（温度70 ℃，压力0.8 MPa，空速1.0 h^－1,醇烯摩尔比1.0）下，叔碳烯烃转化率达到62.93%。

Influence of pore-expanding agent on FCC light gasoline etherification behaviors of β zeolite catalyst

A catalyst for etherification of fluid catalystic cracking (FCC) light gasoline for increasing octane number and lowering olefins content was prepared and investigated in a fixed-bed reactor. The influences of preparation condition, such as molecular weight and mass fraction of polyethylene glycol(PEG) as the pore-expanding agent, then way for impregnating oxides, extruding and procedures for impregnation on esterification behaviors of Hβ zeolite, and influences of temperature, pressure, methanol/tert-olefins molar ratio and space velocity on the etherification were investigated. The results showed that the Hβ zeolite catalyst prepared by extrusion in the presence of 10% mass fraction of PEG-4000 pore-expanding agent followed by co-impregnation of two oxides exhibited higher activity. The best shaping condition was that expanding agent was PEG-4000 (10%). Tert-olefins conversion of 62.93% was attained under the optimum reaction condition: 70 ℃, 1 h^－1, 0.8 MPa and MeOH/tert-olefins molar ratio 1.05.