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Water Gas Shift Reaction and Effect of Gasification Reaction in Packed-bed under Heating-up Condition

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Title: Water Gas Shift Reaction and Effect of Gasification Reaction in Packed-bed under Heating-up Condition
Authors: Kashiwaya, Yoshiaki Browse this author →KAKEN DB
Ishii, Kuniyoshi Browse this author
Keywords: water gas shift reaction
coke gasification
kinetic analysis
rate equation
water gas reaction
Boudouard reaction
Issue Date: 15-Apr-2019
Publisher: Iron and Steel Institute of Japan
Journal Title: ISIJ International
Volume: 59
Issue: 4
Start Page: 643
End Page: 654
Publisher DOI: 10.2355/isijinternational.ISIJINT-2018-470
Abstract: For the decrease of CO2 emission from ironmaking field, it is important to clarify the behaviors of hydrogen in blast furnace (BF). However, when hydrogen content increased in BF, many reactions related to hydrogen occurred, and many complicated relationships among the reactions are generated. Especially, the behavior of water gas shift reaction (WGSR) is not understood correctly and the effects on the gasification reaction and the reduction reaction are not known at all. In the present study, the interest was focused on the relationship between WGSR and coke gasification reaction. The WGSR was examined experimentally and kinetic analysis was performed with and without gasification reaction. The quantification of reaction rates was carried out by gas analysis method. Several kind of crucibles were developed for determining the respective reaction rates occurring in different position. The rate equation of invers WGSR was decided aswhere the rate constant in the alumina crucible was obtained as The single WGSR in alumina crucible is in an equilibrium state over 1573 K. Calculation of gasification reaction (KB, Boudouard reaction) in Zone 1 and Zone 1+2+3 were in excellent agreement with the observation under CO–CO2 system (without Hydrogen). When H2 was added to the reaction gases, Water gas reaction I (KW1) and II (KW2) in addition to KB were calculated separately and the total gasification reaction RCScal (=KB+KW1+KW2) was in good agreement with the observation. The relationship between the separated gasification reactions (KB, KW1 and KW2) and WGSR was discussed.
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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