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Previous studies of MoS₂ and CoMoS are reviewed, discussed and compared with new results for NiMoS. Introduction of Ni or Co to MoS₂/Al₂O₃ catalysts classically yields a significant increase in HDS performance. Irrespective of the promoter, an increase in S₀, the number of labile sulfur atoms, is observed. In contrast, kRE, the H₂S liberation rate constant, plotted as a function of the Ni/Mo ratio, presents a volcano profile on Ni-promoted catalysts, but kRE reaches a plateau from low Co/Mo ratios on Co-promoted catalysts. The \u0027TiMoS\u0027 phase, which is formed in-situ during HDS on Mo/TiO₂ catalysts, promotes sulfur mobility and makes Mo/TiO₂ catalysts more active than Mo/Al₂O₃ catalysts. Nevertheless, CoMo/TiO₂ catalysts are less active than CoMo/Al₂O₃ catalysts because further promotion of \u0027TiMoS\u0027 phase with Co might yield excessive weakening of the metal-sulfur bonds, and/or some Co atoms might be \u0027lost\u0027 in the TiO₂ matrix without interacting with MoS₂. 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Comparison by ³⁵S radiotracer methods of hydrodesulfurization behavior for molybdenum, cobalt-molybdenum and nickel-molybdenum catalysts supported on γ-alumina and high specific surface area titania
http://hdl.handle.net/10076/9283
http://hdl.handle.net/10076/9283194abbee-36f7-40f4-84a0-c6b558952b1f
名前 / ファイル | ライセンス | アクション |
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40A7884.pdf (637.9 kB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2008-11-14 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Comparison by ³⁵S radiotracer methods of hydrodesulfurization behavior for molybdenum, cobalt-molybdenum and nickel-molybdenum catalysts supported on γ-alumina and high specific surface area titania | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Hydrodesulfurization | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Dibenzothiophene | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | γ-Alumina | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | High surface area titania | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Nickel molybdenum catalyst | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Radiotracer method | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者 |
Ishihara, Atsushi
× Ishihara, Atsushi× Dumeignil, Franck× Morimoto, Kazuya× Qian, Eika W.× Kabe, Toshiaki× Inoue, Shinichi× Muto, Akihiro |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | The differences between MoS₂, CoMoS and NiMoS HDS catalysts supported on γ-alumina and high SSA titania are investigated based on the results of [³⁵S]DBT HDS experiments. Previous studies of MoS₂ and CoMoS are reviewed, discussed and compared with new results for NiMoS. Introduction of Ni or Co to MoS₂/Al₂O₃ catalysts classically yields a significant increase in HDS performance. Irrespective of the promoter, an increase in S₀, the number of labile sulfur atoms, is observed. In contrast, kRE, the H₂S liberation rate constant, plotted as a function of the Ni/Mo ratio, presents a volcano profile on Ni-promoted catalysts, but kRE reaches a plateau from low Co/Mo ratios on Co-promoted catalysts. The 'TiMoS' phase, which is formed in-situ during HDS on Mo/TiO₂ catalysts, promotes sulfur mobility and makes Mo/TiO₂ catalysts more active than Mo/Al₂O₃ catalysts. Nevertheless, CoMo/TiO₂ catalysts are less active than CoMo/Al₂O₃ catalysts because further promotion of 'TiMoS' phase with Co might yield excessive weakening of the metal-sulfur bonds, and/or some Co atoms might be 'lost' in the TiO₂ matrix without interacting with MoS₂. In contrast, introduction of Ni to Mo/TiO₂ catalysts yields significant increases in both kRE and S0. The NiMo/TiO₂ catalysts exhibit HDS performances close to those of Al₂O₃-supported catalysts. Clearly catalytic behavior over Co- and Ni-promoted catalysts is different. | |||||
書誌情報 |
Journal of the Japan Petroleum Institute 巻 50, 号 3, p. 154-161, 発行日 2007-07-01 |
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ISSN | ||||||
収録物識別子タイプ | PISSN | |||||
収録物識別子 | 1346-8804 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA11590615 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1627/jpi.50.154 | |||||
フォーマット | ||||||
内容記述タイプ | Other | |||||
内容記述 | application/pdf | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
日本十進分類法 | ||||||
主題Scheme | NDC | |||||
主題 | 575 | |||||
出版者 | ||||||
出版者 | Japan Petroleum Institute | |||||
関係URI | ||||||
関連名称 | http://www.jstage.jst.go.jp/article/jpi/50/3/50_154/_article | |||||
ノート | ||||||
出版者版電子ジャーナルあり | ||||||
資源タイプ(三重大) | ||||||
Journal Article / 学術雑誌論文 |