首页|Effect of cis/trans molecular structures on pyrolysis performance and heat sink of decalin isomers
Effect of cis/trans molecular structures on pyrolysis performance and heat sink of decalin isomers
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Decalin is considered as an important com-pound of high-energy-density endothermic fuel,which is an ideal on-board coolant for thermal management of advanced aircraft.However,decalin contains two isomers with a tunable composition,and their effects on the pyrolysis performance,such as the heat sink and coking tendency have not been demonstrated.Herein,we inves-tigated the pyrolysis of decalin isomers,i.e.,cis-decalin,trans-decalin and their mixtures(denoted as mix-decalin),in order to clarify the effects of the cis-/trans-structures on the pyrolysis performance of decalin fuels.The pyrolysis results confirmed that conversion of the tested fuels(600-725 ℃,4 MPa)decreased in the order cis-decalin＞mix-decalin＞trans-decalin.Detailed analyses of the pyrol-ysis products were used to compare the product distribu-tions from cis-decalin,mix-decalin and trans-decalin,and the yields of some typical components(such as cyclohexene,1-methylcyclohexene,benzene and toluene)showed significant differences,which could be ascribed to deeper cracking of cis-decalin.Additionally,the heat sinks and coking tendencies of the decalins decreased in the order cis-decalin＞mix-decalin＞trans-decalin.This work demonstrates the relationship between the cis/trans structures and the pyrolysis performance of decalin,which provides a better understanding of the structure-activity relationships of endothermic hydrocarbon fuels.
Key Laboratory for Green Chemical Technology of the Ministry of Education,School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China
Collaborative Innovative Center of Chemical Science and Engineering(Tianjin),Tianjin 300072,China
Zhejiang Institute of Tianjin University,Ningbo 315201,China
Haihe Laboratory of Sustainable Chemical Transformations,Tianjin 300192,China
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National Key R&D Program of ChinaHaihe Laboratory of Sustainable Chemical TransformationsPostdoctoral Science Foundation of ChinaNational Natural Science Foundation of China
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