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Effect of phosphorus and transition metal-modified ZSM-5 on the catalytic pyrolysis performance of C7 hydrocarbons with different structures
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Kaijun HOU1, 2, Meijia LIU3, Zhifeng WANG2, Jinjun CAI2, Rong GUO2, Jinsen GAO1, *, Gang WANG1, *, An MA1, 4
Journal of Fuel Chemistry and Technology | 2026, 54(7) : 20250396-1300 - 20250396-1310
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Journal of Fuel Chemistry and Technology | 2026, 54(7): 20250396-1300-20250396-1310
Effect of phosphorus and transition metal-modified ZSM-5 on the catalytic pyrolysis performance of C7 hydrocarbons with different structures
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Kaijun HOU1, 2, Meijia LIU3, Zhifeng WANG2, Jinjun CAI2, Rong GUO2, Jinsen GAO1, *, Gang WANG1, *, An MA1, 4
Affiliations
  • 1College of Chemical Engineering and Environment, China University of Petroleum (Beijing), Beijing 102249, China
  • 2Lanzhou Petrochemical Research Center, Petrochemical Research Institute, PetroChina, Lanzhou 730060, China
  • 3Petrochemical Research Institute, PetroChina, Beijing 102206, China
  • 4PetroChina Planning & Engineering Institute, Beijing 100083, China
Published: 2026-07-10 doi: 10.3724/2097-213X.2026.JFCT.0003
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In this study, phosphorus and transition metal-modified ZSM-5 molecular sieves were prepared via the incipient wetness impregnation method and characterized by XRD, N2 adsorption-desorption, and pyridine-IR spectroscopy. The effects of modified zeolites on the catalytic pyrolysis of n-heptane, 3-methylhexane, and methylcyclohexane were systematically investigated, revealing the structure-activity relationship between acid properties and catalytic performance. The results indicate that phosphorus and transition metal modification can regulate the L/B acid ratio of ZSM-5, which significantly influences product distribution. An excessively high L/B acid ratio promotes hydrogen and coke formation, leading to pore blockage and reduced conversion, whereas an appropriate L/B acid ratio facilitates mild dehydrogenation, enhancing ethylene and propylene yields. The reactant conversion followed the order: n-heptane > 3-methylhexane > methylcyclohexane. Efficient conversion of 3-methylhexane and methylcyclohexane requires catalysts with high L acid mount, strong Brønsted acid amount, optimized L/B acid ratio, as well as high specific surface area and micropore specific surface area. This study provides critical insights for designing high-efficiency alkane pyrolysis catalysts.

3-methylhexane  /  methylcyclohexane  /  pyrolysis  /  molecular sieves  /  reaction  /  transition metal  /  modification  /  dehydrogenation
侯凯军, 刘美佳, 王智峰, 蔡进军, 郭蓉, 高金森, 王刚, 马安. 磷和过渡金属改性ZSM-5对不同结构C7烃催化裂解反应性能的影响. 燃料化学学报（中英文）, 2026 , 54 (7) : 20250396-1300 -20250396-1310 . DOI: 10.3724/2097-213X.2026.JFCT.0003
Kaijun HOU, Meijia LIU, Zhifeng WANG, Jinjun CAI, Rong GUO, Jinsen GAO, Gang WANG, An MA. Effect of phosphorus and transition metal-modified ZSM-5 on the catalytic pyrolysis performance of C7 hydrocarbons with different structures[J]. Journal of Fuel Chemistry and Technology, 2026 , 54 (7) : 20250396-1300 -20250396-1310 . DOI: 10.3724/2097-213X.2026.JFCT.0003
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Year 2026 volume 54 Issue 7
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Article Info
doi: 10.3724/2097-213X.2026.JFCT.0003
  • Receive Date：2025-12-08
  • Online Date：2026-09-23
  • Published：2026-07-10
Article Data
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History
  • Received：2025-12-08
  • Revised：2026-01-07
  • Accepted：2026-01-21
Affiliations
    1College of Chemical Engineering and Environment, China University of Petroleum (Beijing), Beijing 102249, China
    2Lanzhou Petrochemical Research Center, Petrochemical Research Institute, PetroChina, Lanzhou 730060, China
    3Petrochemical Research Institute, PetroChina, Beijing 102206, China
    4PetroChina Planning & Engineering Institute, Beijing 100083, China
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https://castjournals.cast.org.cn/joweb/rlhxxb/EN/10.3724/2097-213X.2026.JFCT.0003
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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