HZSM-5的氮化及其在乙苯与乙醇烷基化反应中的应用(英文)  

Nitridation of HZSM-5 and Its Application in Ethylation of Ethylbenzene with Ethanol to Para-diethylbenzene

作　　者：关新新[1] 李娜[1] 武光军[1] 章福祥[1] 陈继新[1] 关乃佳[1] 

机构地区：[1]南开大学化学学院新催化材料科学研究所,天津300071

出　　处：《催化学报》2005年第8期634-636,共3页

基　　金：SupportedbytheNationalBasicResearchProgramofChina(2003CB615801)andtheNationalNaturalScienceFoundationofChina(20233030).

摘　　要：高温下经氨气处理得到的氮化HZSM5能够保持原有分子筛良好的晶体结构和较高的比表面积.吡啶吸附红外光谱测试结果表明,氮化后的分子筛表面酸性有一定的改变.将此分子筛应用于乙苯烷基化反应中,发现对二乙苯的选择性有明显的提高,同时能够保持稳定的反应活性.ZSM-5 is widely used as a catalyst for the ethylation of ethylbenzene with ethanol to para-diethylbenzene （p-DEB） because of its shape selectivity and surface acidity. However, the strong acidity of ZSM- 5 is detrimental to a good selectivity for p-DEB and it leads to coking and a rapid decrease in catalytic activity. To overcome this limitation, many modification methods to adjust the surface acidity of ZSM-5 and to promote its para-selectivity have been reported. Unfortunately, many of them usually give rise to a loss of crystallinity and structural damage which result in a short lifetime of the catalyst. Consequently, it is desirable to find a new way to obtain well distributed acid sites while retaining good crystallinity and high specific surface area as well.

关 键 词：ZSM-5分子筛 氮化 改性 乙苯 烷基化 对二乙苯 

分 类 号：O621.25[理学—有机化学]