分子筛中的结炭及其氧化烧除  

Coke Formation in Zeolites and Its Removal by Oxidation

作　　者：刘中民[1] 陈国权[1] 王清遐[1] 梁娟[1] 蔡光宇[1] 

机构地区：[1]中国科学院大连化学物理研究所

出　　处：《石油化工》1994年第9期584-587,共4页Petrochemical Technology

摘　　要：选择甲醇转化为烃类的反应，对ＨＹ，ＨＺＳＭ－５、ＨＭｄ和ＨＴ四种不同结构的分子筛上的积炭进行研究。在此基础上，应用程序升温氧化方法（ＴＰＯ）对积炭的氧化脱除进行考察。结果表明，分子筛的孔道结构对结炭反应的限制作用，不仅体现在积炭速度的快慢上，同时也决定着积炭在分子筛内的分布形式及其化学组成，与分子筛本身的结构特点有关。积炭烧除的难易与分子筛的结构特点、积炭的沉积方式以及积炭的化学性质有关。分子筛的结构则是主要的影响因素。推测以烧炭速度是否以氧的扩散速度为控制步骤分为两种类型。一般结炭速度越快，容易烧除，反之亦然。coke formation in HY,HT,HMd and HZSM-5 zeolites in methanol conversion reactionand its removal by temperature programmed oxidation(TPO)have been studied.It has beenfound that the influence of shape selective effects of the pore structure of the zeolite isnot only on the coking rate and coke content,but also on the location and chemicalcomposition of the coke as well.The pore systems of the zeolites are also the inajor factorsaffecting tlie oxidation rate of the coke. The other factors are the location or distributionof the coke in or on the zeolites and its chemical comPosition. In general, the faster thecoking rate,the easier will be the coke removal.

关 键 词：分子筛 结炭 烧炭 氧化 催化裂化 

分 类 号：TE624.91[石油与天然气工程—油气加工工程]