One-step synthesis of dimethyl ether from syngas with Fe-modified zeolite ZSM-5 as dehydration catalyst

• Published in: Catalysis letters Vol. 98; no. 4; pp. 235 - 240
• Main Authors: Xia, Jianchao, Mao, Dongsen, Zhang, Bin, Chen, Qingling, Tang, Yi
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer 01-12-2004; Springer Nature B.V
• Subjects: Atomic emission spectroscopy; Basicity; Catalysis; Catalysts; Chemistry; Dehydration; Dimethyl ether; Emission analysis; Exact sciences and technology; General and physical chemistry; Inductively coupled plasma; Ion exchange; Iron; Selectivity; Surface physical chemistry; Synthesis gas; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Zeolites; Zeolites: preparations and properties; Modification; basicity; Ether; Fe-containing ZSM-5 zeolites; dimethyl ether; syngas; Alcohol; Acidity; Zeolite; Dehydration; Synthesis gas; Molecular sieve; Heterogeneous catalysis; Transition metal Ions; Synthesis; Alkanol; Alkalinity; Iron Ions; Ion exchange; Catalyst; Modified material; Methanol
• ISSN: 1011-372X; 1572-879X
• DOI: 10.1007/s10562-004-8686-x

A number of Fe-containing ZSM-5 zeolites, such as HFeZSM-5 and HFeAlZSM-5 prepared by hydrothermal synthesis and Fe-modified ZSM-5 through solid-state ion-exchange, were adopted as methanol dehydration catalysts for syngas to dimethyl ether (STD) process. Their structures, acidic and basic properties were characterized by XRD, ESR, ICP-AES, TPD and FT-IR. Among these Fe-containing zeolites, the Fe-modified ZSM-5 displayed the highest dimethyl ether selectivity, least CO2 production. Some correlations between catalytic performance and acidity and basicity of Fe-containing ZSM-5 zeolite were discussed.