Experimental study of cracking methane by Ni/SiO2 catalyst

S. Fukada; N. Nakamura; J. Monden; M. Nishikawa

doi:10.1016/j.jnucmat.2004.04.199

Experimental study of cracking methane by Ni/SiO₂ catalyst

S. Fukada, N. Nakamura, J. Monden, M. Nishikawa

Engineering Science for Advanced energy system

Research output: Contribution to journal › Conference article › peer-review

29 Citations (Scopus)

Abstract

Rates of CH₄ cracking on a Ni/SiO₂ composite catalyst in a flow-through system were determined as a function of a flow rate, the CH₄ concentration in carrier, temperature and the amount of carbon deposits. The CH₄ decomposition reaction was of the first-order, and its rate constant was independent of the flow rate and the inlet CH₄ concentration. Values of the steady-state decomposition rate constant were correlated to k_decomp=3.09×10¹exp(-29.5[kJ/mol]/ R_gT) [s^-1]. The overall decomposition rate gradually decreased with an increase in the amount of carbon deposits in the catalyst bed. The history of the CH₄ decomposition was discussed in terms of an increase in the linear velocity through the bed and an increase in interference with catalytic performance on Ni. Regeneration of the catalyst was compared under two purge gas conditions between H₂ and O₂. It was found that the H₂ purge was more efficient.

Original language	English
Pages (from-to)	1365-1369
Number of pages	5
Journal	Journal of Nuclear Materials
Volume	329-333
Issue number	1-3 PART B
DOIs	https://doi.org/10.1016/j.jnucmat.2004.04.199
Publication status	Published - Aug 1 2004
Event	Proceedings of the 11th Conference on Fusion Research - Kyoto, Japan Duration: Dec 7 2003 → Dec 12 2003

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Materials Science(all)
Nuclear Energy and Engineering

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10.1016/j.jnucmat.2004.04.199

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title = "Experimental study of cracking methane by Ni/SiO2 catalyst",

abstract = "Rates of CH4 cracking on a Ni/SiO2 composite catalyst in a flow-through system were determined as a function of a flow rate, the CH4 concentration in carrier, temperature and the amount of carbon deposits. The CH4 decomposition reaction was of the first-order, and its rate constant was independent of the flow rate and the inlet CH4 concentration. Values of the steady-state decomposition rate constant were correlated to kdecomp=3.09×101exp(-29.5[kJ/mol]/ RgT) [s-1]. The overall decomposition rate gradually decreased with an increase in the amount of carbon deposits in the catalyst bed. The history of the CH4 decomposition was discussed in terms of an increase in the linear velocity through the bed and an increase in interference with catalytic performance on Ni. Regeneration of the catalyst was compared under two purge gas conditions between H2 and O2. It was found that the H2 purge was more efficient.",

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T1 - Experimental study of cracking methane by Ni/SiO2 catalyst

AU - Fukada, S.

AU - Nakamura, N.

AU - Monden, J.

AU - Nishikawa, M.

PY - 2004/8/1

Y1 - 2004/8/1

N2 - Rates of CH4 cracking on a Ni/SiO2 composite catalyst in a flow-through system were determined as a function of a flow rate, the CH4 concentration in carrier, temperature and the amount of carbon deposits. The CH4 decomposition reaction was of the first-order, and its rate constant was independent of the flow rate and the inlet CH4 concentration. Values of the steady-state decomposition rate constant were correlated to kdecomp=3.09×101exp(-29.5[kJ/mol]/ RgT) [s-1]. The overall decomposition rate gradually decreased with an increase in the amount of carbon deposits in the catalyst bed. The history of the CH4 decomposition was discussed in terms of an increase in the linear velocity through the bed and an increase in interference with catalytic performance on Ni. Regeneration of the catalyst was compared under two purge gas conditions between H2 and O2. It was found that the H2 purge was more efficient.

AB - Rates of CH4 cracking on a Ni/SiO2 composite catalyst in a flow-through system were determined as a function of a flow rate, the CH4 concentration in carrier, temperature and the amount of carbon deposits. The CH4 decomposition reaction was of the first-order, and its rate constant was independent of the flow rate and the inlet CH4 concentration. Values of the steady-state decomposition rate constant were correlated to kdecomp=3.09×101exp(-29.5[kJ/mol]/ RgT) [s-1]. The overall decomposition rate gradually decreased with an increase in the amount of carbon deposits in the catalyst bed. The history of the CH4 decomposition was discussed in terms of an increase in the linear velocity through the bed and an increase in interference with catalytic performance on Ni. Regeneration of the catalyst was compared under two purge gas conditions between H2 and O2. It was found that the H2 purge was more efficient.

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Y2 - 7 December 2003 through 12 December 2003

ER -

Experimental study of cracking methane by Ni/SiO₂ catalyst

Abstract

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