分子筛催化剂的失活与积炭

分子筛催化剂的失活与积炭刘中民，陈国权，王清遐，梁娟，蔡光宇（中国科学院大连化学物理研究所，大连１１６０２３）关键词分子筛，结炭，催化剂失活，甲醇转化，ＨＺＳＭ－５结炭是酸性分子筛催化剂失活的主要因素．本文通过具有碳链增长、环化、烷基化等多种反应途径...

DEACTIVATION AND COKE FORMATION ON ZEOLITE CATALYSTS

oke formation and deactivation of HY, HT, HMd, especially HZSM-5, zeolites in methanol conversion reaction have been studied. It has been found that the framework structure of the zeolite is the major factor affecting the coking rate, coke content, as well as the location and the chemical composition of the coke.The coke formed in HT and HZSM-5 zeolites has been found to be hydrogen-rich (C/H< 1 ).For non-pore blocking deactivation,the maximum coke deposit is corresponding to the pore volume of the zeolite. The hydrogen-rich carbonaceous materials formed inside the ZSM-5 channels are considered to be paraffins or cycloparaffins on the basis of C13-NMR results.