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NAOSITE : Nagasaki University's Academic Output SITE > 100 教養部 > 100 紀要 > 長崎大学教養部紀要 自然科学篇 > 第24巻 第1号 >

REACTION MECHANISM OF METHANATION ON IRON CATALYST


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タイトル: REACTION MECHANISM OF METHANATION ON IRON CATALYST
著者: Matsumoto, Hiroshige
発行日: 1983年 7月
引用: 長崎大学教養部紀要. 自然科学篇. 1983, 24(1), p.11-21
抄録: Transient experiments were carried out at 250℃ under atmospheric pressure in order to elucidate qualitatively the reaction mechanism of methanation on a commercial fused iron catalyst. After the catalyst in the steady state was treated by helium for certain periods, a reaction mixture of 10% carbon monoxide in hydrogen was again introduced to the catalyst. These helium-treated catalysts showed no substantial induction period for methane formation, whereas the freshly reduced catalyst showed a 60-minute period of induction. With increasing period of the helium treatment, the rate of methane formation at the new steady state decreased. On the other hand, similar treatment by hydrogen flushing enhanced temporarily the rate of methane formation, which then regained the original steady state within 15 minutes. The rate of methane formation in the new steady state after the helium flushing decreased in proportion to increased amounts of water removed during the helium treatment. Increase in the methanation rate after the hydrogen treatment was closely related to the amount of surface oxygen species removed by hydrogen. The reaction intermediate on the working surface is discussed in accordance with the scheme reported in the previous papers of this series.
URI: http://hdl.handle.net/10069/16556
ISSN: 02871319
資料タイプ: Departmental Bulletin Paper
原稿種類: publisher
出現コレクション:第24巻 第1号

引用URI : http://hdl.handle.net/10069/16556

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