图书馆订阅: Guest
Begell Digital Portal Begell 数字图书馆 电子图书 期刊 参考文献及会议录 研究收集
多孔介质期刊
影响因子: 1.752 5年影响因子: 1.487 SJR: 0.43 SNIP: 0.762 CiteScore™: 2.3

ISSN 打印: 1091-028X
ISSN 在线: 1934-0508

卷:
卷 23, 2020 卷 22, 2019 卷 21, 2018 卷 20, 2017 卷 19, 2016 卷 18, 2015 卷 17, 2014 卷 16, 2013 卷 15, 2012 卷 14, 2011 卷 13, 2010 卷 12, 2009 卷 11, 2008 卷 10, 2007 卷 9, 2006 卷 8, 2005 卷 7, 2004 卷 6, 2003 卷 5, 2002 卷 4, 2001 卷 3, 2000 卷 2, 1999 卷 1, 1998

多孔介质期刊

DOI: 10.1615/JPorMedia.v9.i3.10
pages 185-193

Coking of a Porous Catalyst and Its Inhibiting by Siliconiting Modification

Pimu Zhai
School of Chemical Eng., Dalian University of Technology, Dalian, 116012, P.R. China
Liqiu Wang
School of Chemical Eng., Dalian University of Technology, Dalian, 116012, P.R. China
Changhou Liu
School of Chemical Eng., Dalian University of Technology, Dalian, 116012, P.R. China
Shouchen Zhang
School of Chemical Eng., Dalian University of Technology, Dalian, 116012, P.R. China

ABSTRACT

In order to inhibit the coke deposition on the surface of ZSM-5, used as the catalyst for oxidation of benzene to phenol (BTOP) by nitrous oxide, the method of chemical surface deposition of silicon is chosen to modify the surface of ZSM-5. In this paper, the effect of modification condition on the micropore structure and catalyst activity was studied. The porous catalyst was characterized by XRF, EPMA, TEM, XRD, N2 adsorption at −196° C, and pyridine adsorption-infrared techniques. The results show that the uniform SiO2 membrane can be formed on an external surface of the ZSM-5 crystal under moderate modification conditions. The SiO2 membrane covers the acid centers on ZSM-5 external surface, so ZSM-5 external surface coking is inhibited and the pore blockage is avoided or decreased. At the same time, the SiO2 membrane does not change the acid centers located in pores so that the catalyst activity and stability can be improved efficiently. The optimal siliconiting conditions were determined by experiments. Compared with the samples without siliconiting treatment, the samples treated under the optimal conditions can increase the productivity of phenol by 14% for 3 h reaction time and by 41% for 6 h reaction time, respectively.


Articles with similar content:

COMPARISON OF THE PERFORMANCE OF IRON ORE AND SYNTHETIC IRON-BASED OXYGEN CARRIER FOR CHEMICAL LOOPING COMBUSTION OF COAL
International Journal of Energy for a Clean Environment, Vol.19, 2018, issue 3-4
Qian Wang, Ke Liu, Yang Yi, Jianjun Cai, Chao Wang, Ming Luo
THE EFFECTS OF CATHODE SPUTTERING ON IRON SURFACE
High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes, Vol.6, 2002, issue 3
Jolanta Baranowska
COMPACT HEAT EXCHANGERS: VORTEX GENERATORS
Journal of Enhanced Heat Transfer, Vol.24, 2017, issue 1-6
Martin Fiebig
Vortex Generators for Compact Heat Exchangers
Journal of Enhanced Heat Transfer, Vol.2, 1995, issue 1-2
Martin Fiebig
Hydrocarbon Recovery from Porous Media Using Supercritical Fluid Extraction
Journal of Porous Media, Vol.12, 2009, issue 6
Adel A. Azzam, Ali Dowaidar, Abdulrazag Y. Zekri, Ali H. Al-Marzouqi