部分NH+4交换对FER分子筛催化正丁烯骨架异构反应性能的影响.pdf

石油学报(石油加T)
2012年12月
ACTA PETROLEI SINICA( PETROLEUM PROCESSING SECTION)
第28卷第6期
文章编号:1001-8719(2012)06-0927-06
部分NH交换对FER分子筛催化正丁烯骨架
异构反应性能的影响
周峰,陈明,张淑梅,乔凯
(中国石化抚顺石油化工研究院,辽宁抚顺113001)
摘要:采用部分NH交换法制备了一系列不同NH交换度的FER分子筛(记为HF-x,x为FER分子筛的NH
交换度),采用XRD、N2吸附-脱附、XRF、呲啶吸附IR、NHx-TPD等方法对其进行表征。以含丁烯-1体积分数
为10%的丁烯-1/N2为原料,在温度350℃、常压和空速4.0h的条件下,考察了NH交换度对FER分子筛催
化正丁烯骨架异构反应性能的影响。结果表明,随NH交换度的增加,初始正丁烯转化率升高,而异丁烯选择性
降低。当交换度为45时,初始异丁烯产率最高。除FER分子筛特殊的二维孔道系统外,中强/强酸中心比例是影
响初始阶段异丁烯形成的重要因素
关键词:正丁烯;骨架异构;异丁烯;FER分子筛
中图分类号:TE624.9文献标识码:Adoi:10.3969/j.issa.1001-8719.2012.06.007
Effect of Partial NH Exchange on n-butene Skeletal Isomerization Catalytic
Performance of FER Zeolit
ZHOU Feng, CHEN Ming, ZHANG Shumei, QIAO Kai
Fushun Research Institute of Petroleum and Petrochemicals, SINOPEC, Fushun 113001, China)
Abstract: A series of FER zeolites with different NH; exchange levels (denoted as HF-I and a
standed for the NH* exchange level) were prepared by partial NH exchange method, and
characterized by XRD, N2 adsorption-desorption, XRF, pyridine-adsorbed IR and NH3-TPD. The
catalytic performance of FF- in the skeletal isomerization of n-butene into isobutene was tested in
a fixed-bed mini-reactor, operating at 350, atmospheric pressure and MHSV of 4 h, with a
mixture of 10% butene-1 and 90% N, as a model reactant. With the NH exchange level of HF-X
increasing, the initial n-butene conversion of n-butene skeletal isomerization over HF-X increased,
while the isobutene selectivity decreased. The initial isobutene yield of n-butene skeletal
isomerization reached its maximum value over HF-45(The NH exchange level of 45). Except for
the two-dimensional pore system of FER, the proper proportion of the medium and strong acid sites
played an important role in the production of isobutene isomerized from n-butene at the initial stage
of the reaction
Key words: n-butene; skeletal isomerization; isobutene; FER zeolite
异丁烯是一种重要的基本有机化工原料,主要胶和甲基丙烯酸等重要化工产品。近年来,国内
用于合成甲基叔丁基醚(MTBE)、叔丁醇、丁基橡MTBE市场的高需求拉动了对原料异丁烯的需
收稿日期:2011-12-07
甚金项目:中国石油化工集团公司项目(210064)资助
通讯联系入:周峰,男,工程师,博士,从事低碳烯烃综合利用方面的研究;Tel:024-56389577;E-mail:zhoufeng,fshy@sinopec.com