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题名: Stability Enhancement of H-Mordenite in Dimethyl Ether Carbonylation to Methyl Acetate by Pre-adsorption of Pyridine
作者: Liu Junlong2;  Xue Huifu2;  Huang Xiumin2;  Wu Pei-Hao1;  Huang Shing-Jong3;  Liu Shang-Bin1;  Shen Wenjie2
关键词: dimethyl ether ;  carbonylation ;  methyl acetate ;  H-mordenite ;  pyridine ;  stability
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2010-07-01
DOI: 10.1016/S1872-2067(09)60081-4
卷: 31, 期:7, 页:729-738
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: The carbonylation of dimethyl ether to methyl acetate over H-mordenite (HMOR) and pyridine-modified HMOR was compared. The catalytic stability of HMOR was improved significantly by pyridine pre-adsorption, and a yield of methyl acetate similar to 30% was still obtained after 48 h on stream at 473 K. In situ infrared spectroscopy and ammonia temperature-programmed desorption revealed that pyridine preferentially occupied the acidic sites in 12-membered ring pores but not the acidic sites in 8-membered ring pores. (129)Xe NMR studies suggested that the channels of HMOR were blocked by coke in the reaction but those in the pyridine-modified HMOR were not. The acidic sites in the 12-membered ring pores were responsible for the deactivation of HMOR, and the reaction can be directed to occur mainly on the acidic sties in the 8-membered ring pores by the selective adsorption of pyridine in the 12-membered ring pores.
关键词[WOS]: HALIDE-FREE CARBONYLATION ;  VAPOR-PHASE CARBONYLATION ;  ACIDIC ZEOLITES ;  SELECTIVE CARBONYLATION ;  HETEROGENEOUS CATALYSTS ;  EPOXIDATION CATALYSTS ;  BRONSTED ACIDITY ;  XE-129 NMR ;  METHANOL ;  H-ZSM-5
语种: 英语
WOS记录号: WOS:000280868900003
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141866
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Acad Sinica, Inst Atom & Mol Sci, Taipei 10617, Taiwan
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
3.Taiwan Natl Univ, Dept Chem, Taipei 10617, Taiwan

Recommended Citation:
Liu Junlong,Xue Huifu,Huang Xiumin,et al. Stability Enhancement of H-Mordenite in Dimethyl Ether Carbonylation to Methyl Acetate by Pre-adsorption of Pyridine[J]. CHINESE JOURNAL OF CATALYSIS,2010,31(7):729-738.
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