化工进展2016，Vol.35Issue(z2)：174-178,5.DOI:10.16085/j.issn.1000-6613.2016.s2.029
Na2 CO3处理制备复合孔ZSM-5分子筛及其丙烷脱氢制丙烯的催化性能
Preparation of hierarchical ZSM-5 zeolites treated by Na2 CO3 and its catalytic performance for propane dehydrogenation to propylene
摘要
Abstract
HZSM-5 zeolites were treated with different concentrations of Na2 CO3 solutions.The samples were characterized by XRD,N2 adsorption and XRF.The characterizations showed that under suitable concentrations of Na2 CO3 solution,the treatment could form meso-micropore channels,which enhanced the external surface area and mesoporous volume.At the same time, the MFI structure of HZSM-5 was not obviously destroyed,therefore better thermal stability was maintained.The Pt-Sn-K/HZSM-5 catalysts were prepared by subj ecting HZSM-5 samples to alkali treatment,and their catalytic performances for propane dehydrogenation to propylene were evaluated in a fixed-bed reactor.The results showed that the initial activity of the catalyst increased with increasing Na2 CO3 solution concentration, while the stability of the catalyst increased at first and then decreased.When Pt-Sn-K/HZSM-5 (1.8)zeolite catalyst was used for propane dehydrogenation,it showed better activity and stability:after reacting for 100 hours, the conversion of propane only decreased by 2.8%, resulted in a conversion of 3 5.5 3%.The propylene selectivity maintained at 98.4% with no significant change.关键词
ZSM-5/分子筛/介孔/碱性溶液/丙烷脱氢/丙烯Key words
ZSM-5/molecular sieves/mesoporus/alkali solution/propane dehydrogenation/propylene分类
化学化工引用本文复制引用
韩伟,潘相米,谭亚南,程牧曦,吴砚会,何霖,艾珍..Na2 CO3处理制备复合孔ZSM-5分子筛及其丙烷脱氢制丙烯的催化性能[J].化工进展,2016,35(z2):174-178,5.基金项目
四川省应用基础研究项目(2015JY0157)。 （2015JY0157）
