摘要
在Na_2O-SiO-2-Al_2O_3-C_6H_(16)N_2-C_6H_(15)N非水体系中,首次合成了ZSM-48沸石。考察了晶化动力学过程及沸石生成机理。结果表明,在非水体系中ZSM-48沸石的生成是基于典型的固相转化机理。晶化动力学的研究中测得的成核及结晶的表观活化能分别为16.9和7.4Kcal/mol。非水体系ZSM-48沸石催化剂用于合成气直接制备烯烃反应,其CO转化率达到59％,C_2—C_4烯烃选择性达到48％。
ZSM-48 zeolite wag synthesized firstly in non-aqueous system of Na2O-SiO2-Al2O3-C6H16N2-C8H15N. The results show that the mechanism of ZSM--48 formation is a typical solid phase transformation mechanism and that the trace of water affects the crystallization velocity and not the mechanism. The crystallization kinetics was investigated. The apparent activation energies for nu-cleation and crystallization of ZSM-48 in non-aqueous System were found to be 16.9 and 7.4 Kcal/mol respectively,The catalytic behavior of ZSM-48 was characterized by the syntheses of C2-C4 olefinS from CO and H2, the conversion of CO is 59% and the selectivity for C2-C4 olefinS is 48%.
