期刊
FUEL
卷 291, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2021.120159
关键词
Encapsulation; Hydrogen spillover; Methylcyclopentane; Sulfur-tolerant
资金
- National Natural Science Foundation of China [21576177, 21978192, U19B2003]
- Key Research and Development Projects of Shanxi Province [201903D121036]
- Shanxi Provincial Key Innovative Research Team in Science and Technology [2014131006]
In this study, a novel bifunctional catalyst Pt@SOD + HZSM-5 was designed, which exhibited outstanding selectivity to C6-cyclic products in the hydrogenative conversion of methylcyclopentane (MCP) through combining spillover hydro/dehydrogenation and acid-catalyzed mechanism. Additionally, the Pt@SOD + HZSM-5 coupling catalyst showed excellent sulfur-tolerant ability.
Zeolite-supported metal bifunctional catalysts have been widely applied in many chemical industrial processes, and their catalytic performances greatly depend on the synergetic effects between hydro/dehydrogenation and acid functions. In this work, we design and prepare a novel bifunctional catalyst by coupling SOD-encapsulated Pt NPs (Pt@SOD) with HZSM-5 (Pt@SOD + HZSM-5). Successful encapsulation of Pt NPs in sodalite (Pt@SOD) was confirmed by TEM and toluene hydrogenation reaction. Upon mixing Pt@SOD with HZSM-5 and activating at 400 degrees C, solid-state ion exchange occurred between the Na+ in SOD and the H+ in HZSM-5, resulting in forming surface hydroxyl groups on the Pt@SOD and generating the medium acid sites on HZSM-5. Pt@SOD + HZSM-5 showed an outstanding selectivity to C6-cyclic products in hydrogenative conversion of methylcyclopentane (MCP) via combining spillover hydro/dehydrogenation and acid-catalyzed mechanism. Spillover hydro/dehydrogenation is the key to achieving high selectivity to C6-cyclic products. Pt@SOD + HZSM-5 coupling catalyst exhibited the excellent sulfur-tolerant ability.
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