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Fibrous silica mesoporous ZSM-5 for carbon monoxide methanation

Teh, L. P. and Triwahyono, S. and Jalil, A. A. and Firmansyah, M. L. and Mamat, C. R. and Majid, Z. A. (2016) Fibrous silica mesoporous ZSM-5 for carbon monoxide methanation. Applied Catalysis A: General, 523 . pp. 200-208. ISSN 0926-860X

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Abstract

A core-shell fibrous silica mesoporous ZSM-5 (FmZSM-5) has been developed by employing microemulsion system coupled with zeolite crystal-seed crystallization method and unprecedented applied in CO methanation. The FmZSM-5 showed greatly enhanced catalytic activity with the rate of CO conversion (0.0708 μmol-CO/m2 s) and the rate of CH4 formation (0.0488 μmol-CH4/m2 s) at 723 K, which is two-fold higher than that of the conventional recrystallized mZSM-5 (RmZSM-5). Besides, it showed high stability with no sign of deactivation up to 50 h. The presence of oxygen vacancies led to the increase in interparticle porosity, basicity, and CO and H2 adsorption sites which are believed to be the keys for remarkably improved in CO methanation. Additionally, the influence of diffusion limitation was indicated to be negligible. Such a unique core-shell fibrous silica mesoporous ZSM-5 and their excellent catalytic properties suggest the significant application possibilities in base-catalyzed reaction especially in the production of methane.

Item Type:Article
Uncontrolled Keywords:Alkalinity, Carbon, Carbon monoxide, Catalyst activity, Hydrogenation, Mesoporous materials, Methanation, Microemulsions, Porosity, Shells (structures), Silica, Base-catalyzed reaction, Catalytic properties, Co methanation, Diffusion limitations, Enhanced catalytic activity, Interparticle porosity, Mesoporous ZSM-5, Microemulsion systems, Oxygen vacancies
Subjects:Q Science > QD Chemistry
Divisions:Science
ID Code:72209
Deposited By: Fazli Masari
Deposited On:20 Nov 2017 08:18
Last Modified:20 Nov 2017 08:18

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