In-situ encapsulation of Pt and acid-site engineering in hierarchical SAPO-11 for enhanced isomerization-cracking and anti-coking in sustainable aviation fuel productionOA
Isomerization-cracking is a critical step in the preparation of sustainable aviation fuel(SAF).The practical application of conventional Pt/SAPO-11 catalysts is hindered by several deactivation mechanisms,including metal sintering,pore blockage,and inefficient mass transfer of bulky molecules,all of which contribute to unsustainable performance over time.To overcome these challenges,this study introduces a novel Pt@SAPO-11-H catalyst,where sub-nanometric Pt clusters are encapsulated within a hierarchically porous SAPO-11 framework.The synthesis employs a ligand-assisted in situ encapsulation strategy with P123 as a mesoporogen.Beyond constructing hierarchical porosity,a critical secondary role of P123 is:the formation of amorphous AlPO_(4)during crystallization,which selectively covers strong acid sites on SAPO-11.This acid-site engineering effectively suppresses excessive cracking,a key factor for maximizing SAF yield.Comprehensive characterizations confirmed the confinement of Pt clusters,the hierarchical pore structure,and the moderated acidity.The catalytic evaluation using octadecane as a model feedstock,achieved a 66.4%SAF yield with a 4.12 i/n ratio.The SAF yields of cottonseed oil,castor oil,palm oil,and tiger nut oil reached 82%,70.2%,79%,and 80%,respectively.These results highlight the dual benefits of hierarchical porosity for enhanced diffusion and metal encapsulation for precise active site localization,offering a promising solution for scalable SAF production.
Xiaokang Yue;Yufeng Hou;Luyao Xie;Fei Han;Zhongxu Zhang;Qingxin Guan;Wei Li
College of Chemistry,State Key Laboratory of Elemento-Organic Chemistry,Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education),Nankai University,Tianjin,300071,ChinaCollege of Chemistry,State Key Laboratory of Elemento-Organic Chemistry,Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education),Nankai University,Tianjin,300071,ChinaCollege of Chemistry,State Key Laboratory of Elemento-Organic Chemistry,Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education),Nankai University,Tianjin,300071,ChinaCollege of Chemistry,State Key Laboratory of Elemento-Organic Chemistry,Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education),Nankai University,Tianjin,300071,ChinaCollege of Chemistry,State Key Laboratory of Elemento-Organic Chemistry,Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education),Nankai University,Tianjin,300071,ChinaCollege of Chemistry,State Key Laboratory of Elemento-Organic Chemistry,Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education),Nankai University,Tianjin,300071,ChinaCollege of Chemistry,State Key Laboratory of Elemento-Organic Chemistry,Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education),Nankai University,Tianjin,300071,China
化学化工
Sustainable aviation fuelIsomerizationHierarchical SAPO-11Acid site engineeringAmorphous AlPO_(4)
《Green Energy & Environment》 2026 (5)
P.1362-1372,11
financially supported by the National Natural Science Foundation of China(NSFC,22172082 and 22578224)the NCC Fund(NCC2022PY07)the Fundamental Research Funds for the Central Universities.
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