Synthesis of hierarchical SAPO-11-based catalysts with Al-based metal-organic framework derivative as mesoporogen to improve n-decane branched isomerization  被引量:2

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作  者:Xue-Man Wang Cheng-Long Wen Yu Fan 

机构地区:[1]State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Beijing,102249,China [2]Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology,Advanced Catalysis and Green Manufacturing Collaborative Innovation Center,and School of Petrochemical Engineering,Changzhou University,Changzhou,Jiangsu,213164,China

出  处:《Petroleum Science》2022年第6期3171-3181,共11页石油科学(英文版)

基  金:financial support of Science Foundation of China University of Petroleum,Beijing(Grant No.KYJJ2012-03-03)

摘  要:Hierarchical SAPO-11 molecular sieve(ACS-11) was successfully synthesized employing the Al2O3/carbon(Al_(2)O_(3)/C) composite obtained through the pyrolysis of Al-based metal-organic framework(Al-MOF-96)as mesoporogen.Unlike other carbon-based mesoporogens with strong hydrophobicity,the Al_(2)O_(3)/C interacts with phosphoric acid and generates the AlPO_(4)/C structure,which promotes the Al2O3/C dispersion in the synthesis gel of SAPO-11 and avoids the phase separation between them.The Al_(2)O_(3)/C as mesoporogen decreases the crystallite size of SAPO-11 via preventing the aggregation of SAPO-11crystals.Additionally,the addition of Al_(2)O_(3)/C improves the Si distribution in the ACS-11 framework.Consequently,ACS-11 has smaller crystallites,more mesopores,and a greater amount of medium Bronsted acid centers than the conventional microporous SAPO-11 and the SAPO-11 synthesized using activated carbon as mesoporogen.The corresponding Pt/ACS-11 catalyst exhibits the maximal selectivity to multi-branched C10isomers(23.28%) and the minimal cracking selectivity(15.83%) in n-decane hydroisomerization among these catalysts.This research provides a new approach for preparing hierarchical silicoaluminophosphate molecular sieve-based catalysts to produce high-quality fuels.

关 键 词:Hierarchical SAPO-11 Al_(2)O_(3)/C composite HYDROISOMERIZATION Branched isomers 

分 类 号:TE624.9[石油与天然气工程—油气加工工程]

 

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