文献类型：期刊文献

中文题名：磷改性HY分子筛催化剂的酸性和催化活性的研究

英文题名：STUDY ON ACIDITY AND CATALYTIC ACTIVITY OF HY ZEOLITES MODIFIED WITH PHOSPHORUS

作者：徐佩若[1];朱志华[1];戴迎春[2];季桂南[2];包平[2]

机构：[1]华东化工学院化学工程系;[2]联合化学反应工程研究所华东化工学院分所

年份：1993

卷号：9

期号：1

起止页码：41

中文期刊名：石油学报（石油加工）

外文期刊名：Acta Petrolei Sinica(Petroleum Processing Section)

收录：CSTPCD;;Scopus;北大核心:【北大核心1992】；CSCD:【CSCD_E2011_2012】；

语种：中文

中文关键词：HY分子筛;催化剂;表面酸性;磷

摘要：改性的HY分子筛对苯和乙烯的液相烷基化反应具有高的活性和选择性.在HY分子筛中引入不同量的镁、镍、镧、磷等离子进行改性,当磷含量为2.5m%时,烷基化反应性能最佳,乙烯转化率达98.7%,乙苯选择性达85.4%.TPD、IR、XRD等方法研究结果表明,在磷改性的HY分子筛上,B酸和L酸都是烷基化的活性中心;强酸对催化活性起主要作用,弱酸对烷基化反应也有一定的贡献;强酸量与催化活性呈正比关系.
The liquid phase alkylation of benzene with ethylene was carried out over HY zeolites modified with phosphorus as well as magnesium, nickel and lanthanum. The acidic and structural properties of PHY impregnated with different amount of H_3PO_4 were investigated. It was found that the HY containing 2.5% P gives the best alkylation performance with ethylene conversion up to 98.7% and ethylbenzene selectivity up to 85.4%.The Bronsted acid sites and the Lewis acid sites are active sites for alkylation. The acti vity centers for the alkylation of benzene with ethylene are mainly the strong acid sites. The weak acid sites may act as auxiliary centers. The results showed that the catalytic activity of alkylation in creases with increasing amount of strong acid.