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Title: Simultaneous production of hydrogen and carbon nanotubes from biogas: On the effect of Ce addition to CoMo/MgO catalyst
Authors: Thunyathon Kludpantanapan
Paveenuch Nantapong
Raminda Rattanaamonkulchai
Atthapon Srifa
Wanida Koo-Amornpattana
Weerawut Chaiwat
Chularat Sakdaronnarong
Tawatchai Charinpanitkul
Suttichai Assabumrungrat
Suwimol Wongsakulphasatch
Masao Sudoh
Ryo Watanabe
Choji Fukuhara
Sakhon Ratchahat
Shizuoka University
King Mongkut's University of Technology North Bangkok
Chulalongkorn University
Mahidol University
Amano Institute of Technology
Keywords: Energy;Physics and Astronomy
Issue Date: 8-Nov-2021
Citation: International Journal of Hydrogen Energy. Vol.46, No.77 (2021), 38175-38190
Abstract: In this study, hydrogen and carbon nanotubes (CNTs) are simultaneously produced via a synergistic combined process of CO2 methanation (METH) and chemical vapor deposition (CVD) processes using biogas as a feedstock. METH process could upgrade CO2 containing biogas into CH4-rich gas which then decomposed into H2 and forming CNTs over CoMo/MgO catalyst by CVD process. The effects of Ce addition to CoMo/MgO were investigated. Comprehensive characterization confirms that all as-synthesized samples composed of well-aligned multi-walled carbon nanotubes (MWCNTs) with a narrow size distribution. The Ce addition improved CoMo dispersion on MgO, resulting in smaller and uniform CNTs. The small addition of Ce into CoMo/MgO catalyst could enhance the production CNTs yield. The higher Ce addition would, however, result in the CNTs yield decreased, attributed to a high basicity of CeO2 surface and a large coverage of CeO2 on the catalyst surface. The IG/ID increased with increased Ce addition, while the surface area monotonically decreased, attributed to a decrease in defects of nanotubes. In addition, this wisely combined process could result in a remarkable 100%CO2 elimination, while high CH4 conversion of 90% was obtained. The H2 production yield could gain more than 30 vol% with respect to H2 in the feed stream. The H2 yield and purity in the effluent gas stream were approximately 90%.
ISSN: 03603199
Appears in Collections:Scopus 2021

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