Selective Hydrogenolysis of Methylcyclopentane in the Presence of Excess Methylcyclohexane Using Ir/SiO2 Catalyst
Methylcyclohexane (MCH) is a promising candidate for use as a liquid organic hydrogen carrier, but is isomerized into undesirable five-membered-ring compounds with similar boiling points to MCH, so purification requires selective conversion of the five-membered-ring compounds without reaction of the...
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Published in | Journal of the Japan Petroleum Institute Vol. 66; no. 2; pp. 57 - 67 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | Japanese English |
Published |
Tokyo
The Japan Petroleum Institute
01.03.2023
Japan Science and Technology Agency |
Subjects | |
Online Access | Get full text |
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Summary: | Methylcyclohexane (MCH) is a promising candidate for use as a liquid organic hydrogen carrier, but is isomerized into undesirable five-membered-ring compounds with similar boiling points to MCH, so purification requires selective conversion of the five-membered-ring compounds without reaction of the MCH. We found that an Ir/SiO2 catalyst efficiently promoted the selective hydrogenolysis of methylcyclopentane (MCP), a model five-membered-ring compound, in the presence of excess MCH in the reaction system. Ir/SiO2 and Rh/SiO2 catalysts provided high conversions in the hydrogenolysis of MCP at 200 °C, whereas almost no reaction of MCH occurred. In contrast, Pt/SiO2 catalyst was almost inactive in the hydrogenolysis of both MCP and MCH at 200 °C. The difference in reactivities for the Ir/SiO2 and Rh/SiO2 catalysts can be explained by the relatively high strain energy and formation enthalpy of MCP compared to MCH. The Ir/SiO2 catalyst also preferentially promoted the hydrogenolysis of ethylcyclopentane, which is a more realistic impurity, in the presence of excess MCH. |
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ISSN: | 1346-8804 1349-273X |
DOI: | 10.1627/jpi.66.57 |