中国科学院大连化学物理研究所机构知识库
Advanced  
DICP OpenIR  > 中国科学院大连化学物理研究所  > 期刊论文
题名: Bifunctional catalysis of Mo/HZSM-5 in the dehydroaromatization of methane with CO/CO2 to benzene and naphthalene
作者: Liu, S;  Wang, L;  Ohnishi, R;  Ichikawa, M
刊名: KINETICS AND CATALYSIS
发表日期: 2000
卷: 41, 期:1, 页:132-144
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: The catalytic dehydrocondensation of methane to aromatics such as benzene and naphthalene was studied on the Mo carbide catalysts supported on micro- and mesoporous materials such as HZSM-5 (0.6 nm) and FSM-16 (2.7 nm). The Mo catalysts supported on H-ZSM-5 having appropriate micropores (0.6 nm size) and Si/Al ratios (20-70) exhibit higher yields (90-150 nmol/g-cat/s) and selectivities (higher than 74% on the carbon basis) in methane conversion to aromatic products such as benzene and naphthalene at 973 K and 1 atm, although they are drastically deactivated because of substantial coke formation. It was demonstrated that the CO/CO2 addition to methane effectively improves the catalyst performance by keeping a higher methane conversion and selectivities of benzene formation in the prolonged time-on-stream. The oxygen derived from CO and CO2 dissociation suppresses polycondensation of aromatic products and coke formation in the course of methane conversion. XAFS and TG/DTA/mass-spectrometric studies reveal that the zeolite-supported Mo oxide is endothermally converted under the action of methane around 955 K to nanosized particles of molybdenum carbide (Mo2C) (Mo-C, coordination number = 1, R = 2.09 Angstrom; Mo-Mo, coordination number = 2.3-3.5; R = 2.98 Angstrom) The SEM pictures showed that the nanostructured Mo carbide particles are highly dispersed on and inside the HZSM-5 crystals. On the other hand, it was demonstrated by IR measurements of pyridine adsorption that the Mo/HZSM-5 catalysts having the optimum SiO2/Al2O3 ratios around 40 show the maximum Bronsted acidity among the catalysts with the SiO2/Al2O3 ratios of 20-1900. There is a close correlation between the activity of benzene formation in the methane aromatization and the Bronsted acidity of HZSM-5 due to the bifunctional catalysis.
关键词[WOS]: CONVERSION ;  DEHYDROGENATION ;  MOLYBDENUM ;  ZEOLITE ;  AROMATIZATION ;  MO/ZSM-5 ;  ACIDITY ;  CO
语种: 英语
WOS记录号: WOS:000086099600020
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138692
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

Files in This Item:

There are no files associated with this item.


作者单位: 1.Hokkaido Univ, Ctr Catalysis Res, Kita Ku, Sapporo, Hokkaido 060, Japan
2.Hebei Univ Sci & Technol, Shijiazhuang 050018, Peoples R China
3.Dalian Inst Chem Phys, Dalian, Peoples R China

Recommended Citation:
Liu, S,Wang, L,Ohnishi, R,et al. Bifunctional catalysis of Mo/HZSM-5 in the dehydroaromatization of methane with CO/CO2 to benzene and naphthalene[J]. KINETICS AND CATALYSIS,2000,41(1):132-144.
Service
 Recommend this item
 Sava as my favorate item
 Show this item's statistics
 Export Endnote File
Google Scholar
 Similar articles in Google Scholar
 [Liu, S]'s Articles
 [Wang, L]'s Articles
 [Ohnishi, R]'s Articles
CSDL cross search
 Similar articles in CSDL Cross Search
 [Liu, S]‘s Articles
 [Wang, L]‘s Articles
 [Ohnishi, R]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
  Add to CiteULike  Add to Connotea  Add to Del.icio.us  Add to Digg  Add to Reddit 
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Powered by CSpace