文献类型：期刊文章

作　　者：祁彩霞[1] 王云霞[1] 丁孝涛[1] 苏慧娟[1]

机构地区：[1]烟台大学化学化工学院,山东省黄金工程技术研究中心(工业应用),山东烟台264005

出　　处：《Chinese Journal of Catalysis》

基　　金：supported by the Shandong Taishan Scholarship, the Yantai double-hundreds talents plan;the Shandong Natural Science Founda-tion (ZR2015BM006)~~

年　　份：2016

卷　　号：37

期　　号：10

起止页码：1747-1755

语　　种：中文

收录情况：AJ、BDHX、BDHX2014、CAS、CSA、CSA-PROQEUST、CSCD、CSCD2015_2016、EI(收录号：20164502983908)、JST、RSC、SCI-EXPANDED(收录号：WOS:000386865300020)、SCIE、SCOPUS、WOS、ZGKJHX、核心刊

摘　　要：The catalytic cracking of light diesel oil （235–337 ＆#176;C） over gold‐modified ZSM‐5 was investigated in a small confined fluidized bed at 460 ＆#176;C and ambient pressure. Different Au/ZSM‐5 catalysts were prepared by a modified deposition‐precipitation method by changing the preparation procedure and the amount of gold loading and were characterized by X‐ray diffraction, N2 adsorp‐tion‐desorption, temperature‐programmed desorption of NH3, transmission electron microscopy and inductively coupled plasma spectrometer. It was found that a small amount of gold had a posi‐tive effect on the catalytic cracking of light diesel oil and increased propylene production at a rela‐tively low temperature. The maintenance of the ZSM‐5 MFI structure, pore size distribution and the density of weak and strong acid sites of the Au/ZSM‐5 catalysts depended on the preparation pa‐rameters and the Au loading. Simultaneous enhancement of the micro‐activity and propylene pro‐duction relies on a synergy between the pore size distribution and the relative intensity of the weak and strong acid sites. A significant improvement in the micro‐activity index with an increase of 4.5 units and in the propylene selectivity with an increase of 23.2 units was obtained over the Au/ZSM‐5 catalyst with an actual Au loading of 0.17 wt%.

关 键 词：Fluid catalytic cracking  Gold modification  Propylene selectivity  Micro-activity test  

分 类 号：TE624.91] TQ221.212]