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Hokkaido University Collection of Scholarly and Academic Papers >
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Hydroconversion of Dimethylpentanes from Methylcyclohexane Using Two Consecutive Reactors Packed with Pt-modified Solid Acid Catalyst and Supported Ir Catalyst
| Title: | Hydroconversion of Dimethylpentanes from Methylcyclohexane Using Two Consecutive Reactors Packed with Pt-modified Solid Acid Catalyst and Supported Ir Catalyst |
| Other Titles: | 白金修飾固体酸触媒と担持イリジウム触媒を充填した連続二段反応器による水素共存下でのメチルシクロヘキサン転換反応によるジメチルペンタン類合成 |
| Authors: | Ohnishi, Ryuichiro1 Browse this author | | Sugii, Takeshi2 Browse this author | | Doi, Hayato3 Browse this author | | Sakamoto, Yoshinori4 Browse this author | | Kamiya, Yuichi5 Browse this author →KAKEN DB |
| Authors(alt): | 大西, 隆一郎1 | | 杉井, 武2 | | 土居, 隼人3 | | 坂本, 啓典4 | | 神谷, 裕一5 |
| Keywords: | Supported iridium catalyst | | Ring contraction | | Ring opening | | Clean gasoline | | Consecutive reactors |
| Issue Date: | Nov-2009 |
| Publisher: | Japan Petroleum Institute |
| Journal Title: | Journal of the Japan Petroleum Institute |
| Volume: | 52 |
| Issue: | 6 |
| Start Page: | 341 |
| End Page: | 350 |
| Publisher DOI: | 10.1627/jpi.52.341 |
| Abstract: | Hydroconversion of methylcyclohexane was conducted over various noble metal-loaded catalysts at 493 K and atmospheric pressure. On the bases of the proposed reaction route and the rate of reaction over Ir/H-β zeolite, which was the best catalyst examined, we concluded that the low yield of the desired dimethylpentanes (18%) and high yield of undesired methylhexanes (25%) were due to two reasons: (1) formation of ethylcyclopentane with high selectivity at low conversions and (2) higher ring-opening rate of ethylcyclopentane (a precursor of methylhexanes) than that of dimethylcyclopentanes (a precursor of dimethylpentanes). In order to improve the yield of dimethylpentanes, two catalysts for ring contraction from methylcyclohexane to ethyl- or dimethyl-cyclopentanes (Pt-H4SiW12O40/SiO2 or Pt/H-β) and for ring opening of the produced cyclopentanes (Ir/Al2O3) were used either in one reactor as a physical mixture or in two separate reactors connected in series. When the physical mixture (Pt-H4SiW12O40/SiO2 and Ir/Al2O3) was used, there was only a slight increase in the dimethylpentanes yield (20%) with a large amount of undesired products, such as monobranched heptanes and cracked products. In contrast, when two consecutive reactors packed with Ir/H-β and lr/Al2O3 were used, the yield of dimethylpentanes increased to 30%, which was nearly two times of that of methylhexanes, at a 65% conversion of methylcyclohexane, while the yield of undesired methylhexanes was about 15%. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/42516 |
| Appears in Collections: | 環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 神谷 裕一
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