丁烯-2在HZSM-5分子筛上的齐聚反应  

Oligomerization of Butene-2 over HZSM-5 Zeolite

作　　者：刘姝[1] 李春林[1] 刘广宇[1] 张大治[1] 张阳阳[1] 孙新德[1] 刘中民[1] 

机构地区：[1]中国科学院大连化学物理研究所

出　　处：《催化学报》2008年第4期319-324,共6页

摘　　要：在温度为210-300℃、压力为3-5 MPa、LHSV为0.5-1.5 h^-1的条件下,用连续固定床反应器,考察了丁烯-2在HZSM-5上的齐聚反应.结果表明：丁烯-2在HZSM-5分子筛上的反应类型和产物中高碳烯烃的含量与温度、压力及空速有关.反应温度在300℃以下,反应产物主要是烯烃,其结构显示择形催化的特点.HZSM-5分子筛的酸性对齐聚反应的活性和选择性有一定影响,低硅铝比的HZSM-5有较高的活性和高碳烯烃的选择性.Abstract： Oligomerization of butene-2 over HZSM-5 zeolite was carried out in a continuous flow fixed-bed reactor at 210-300 ℃ , 3-5 MPa, and 0.5-1.5 h^-1 of LHSV. The results showed that the reactions of butene-2 over the HZSM-5 zeolite and the content of higher molecular weight olefins in liquid products were influenced by temperature, pressure, and space velocity. The product was dominantly olefins at the reaction temperatures below 300 ℃ , and the less branched structure of the product suggested shape-selective catalysis over HZSM-5. The acidity of the HZSM-5 zeolite influenced the activity and selectivity, and the zeolite with lower silica/alumina ratio enhanced the liquid yield and selectivity for higher olefins.

关 键 词：丁烯-2 齐聚 HZSM-5 酸性 硅铝比 

分 类 号：O643.36[理学—物理化学]