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Simultaneous hydrodeoxygenation-isomerization of biolipids to branched alkanes catalyzed by MoS2/SAPO-11

Author

Listed:
  • Li, Chuntao
  • Han, Yaochi
  • Yu, Panjie
  • Qiu, Liu
  • Ding, Yongxin
  • Cai, Zhenping
  • Ma, Yongde
  • Zhang, Hongwei
  • Cao, Yanning
  • Huang, Kuan
  • Jiang, Lilong

Abstract

Converting biolipids into branched alkanes via direct deoxygenation and isomerization is an effective route to produce clean fuels. Here, a bifunctional MoS2/SAPO-11 catalyst was prepared under in situ sulfidation conditions using sulfur powder. The 10% MoO3-loaded catalyst achieved >99% conversion of methyl palmitate (MP) and raw palm oil (8 MPa H2, and 380 °C), affording >70% liquid yield and a product freezing point of −14 °C. Comprehensive characterizations revealed that in situ-generated MoS2 is highly dispersed on SAPO-11 (<3 layers, <3 nm slab length). This performance originates from the MoS2-acid synergy: MoS2 deoxygenates MP to n-C15/n-C16via HDO/HDCO2/HDCO pathways; the resulting linear alkanes undergo dehydrogenation over MoS2 and subsequent isomerization at acid sites to form long-chain branched alkanes, with acid-catalyzed cracking yielding short-chain branched hydrocarbons. Recycling tests confirmed stable HDO activity, whereas the reduced branching distribution arose mainly from structural degradation of SAPO-11. This study provides a promising strategy for designing bifunctional catalysts toward the direct upgrading of biolipids into high-quality, low-freezing-point liquid fuels.

Suggested Citation

  • Li, Chuntao & Han, Yaochi & Yu, Panjie & Qiu, Liu & Ding, Yongxin & Cai, Zhenping & Ma, Yongde & Zhang, Hongwei & Cao, Yanning & Huang, Kuan & Jiang, Lilong, 2026. "Simultaneous hydrodeoxygenation-isomerization of biolipids to branched alkanes catalyzed by MoS2/SAPO-11," Renewable Energy, Elsevier, vol. 271(C).
    • Handle: RePEc:eee:renene:v:271:y:2026:i:c:s0960148126007949
    DOI: 10.1016/j.renene.2026.125968
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