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Kinetic Analysis of the Decomposition Reaction of CH4 Injecting into Molten Slag

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Title: Kinetic Analysis of the Decomposition Reaction of CH4 Injecting into Molten Slag
Authors: Kashiwaya, Yoshiaki Browse this author →KAKEN DB
Watanabe, Masami Browse this author
Keywords: decomposition of CH4
kinetic analysis
rate constant
molten slag
injecting of methane
Issue Date: Aug-2012
Publisher: Iron and Steel Institute of Japan
Journal Title: ISIJ International
Volume: 52
Issue: 8
Start Page: 1394
End Page: 1403
Publisher DOI: 10.2355/isijinternational.52.1394
Abstract: Utilization of heat of slag is key technology for the reduction of CO2 emission in steel industries. While hydrogen production is important for the society of aiming to the sustainable energy system, the green hydrogen must be produced for the actual CO2 reduction. In the present study, methane gas was injected into a molten slag and hydrogen was produced through the thermal decomposition reaction. CH4 = C + 2H2 Kinetic analysis was performed using an graphite crucible both with empty and slag. The rate constants for the graphite crucible, kG and the slag, kS, were obtained separately. The rate constants for graphite surface and slag surface, kG and kS, respectively, are as follows: kG / cm·s–1 = 41.74 × exp(−51741 / RT) ± 0.05 kS / cm·s–1 = 4.053 × 106 × exp(−190310 / RT) ± 0.05 Using the obtained rate constants, the increase of the area of reaction surface during the CH4 injection was estimated. It was found that the slow soaking of the injecting lance could be utilized for the heat of molten slag. In addition, the slag shape can be a powder type through the injection of CH4.
Rights: 著作権は日本鉄鋼協会にある
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 柏谷 悦章

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