摘要
航空煤油成分复杂,由上百种不同构型的烃类组成,然而正构烷烃、异构烷烃、环烷烃和芳香烃这几类主要组分的构型和性质差异甚大,导致其蒸汽重整反应特性存在较大差异。本论文在前期研发Ni/MgAl_(2)O_(4)基础上,引入Pt构建Ni-Pt双金属催化剂,系统考察了该催化剂对不同构型组分重整反应性能的差异,并对不同构型组分在该催化剂上的重整反应路径进行了阐述。结果表明:液相还原法引人Pt能够使双金属催化剂具有合适的酸性和良好的金属Ni分散性,Ni-Pt两种金属协同效应,不仅能够提高单Ni催化剂活性,同时能够减少Ni烧结,优化催化剂稳定性;另外,不同构型组分在双金属催化剂上的重整性能具有显著差异,其中正癸烷重整的产气率以及H,选择性较为优异。不同构型烃类燃料的反应活性为:甲基环已烷>正癸烷>乙苯。由于甲基环已烷在反应过程中C-C键键能弱,易开环形成链状自由基与水发生重整反应,乙苯具有芳香烃结构且不易开环,重整反应所需能量较高。
The composition of aviation kerosene is complex,consisting of hundreds of different configurations of hydrocarbons,the configuration and properties of the main components of normal paraffin,iso-paraffin,cycloparaffin and aromatic hydrocarbon are very different,resulting in great differences in steam reforming reaction characteristics.In this paper,on the basis of Ni/MgAl_(2)O_(4),Pt was introduced to construct Ni-Pt bimetallic catalyst.The difference in performance of reforming reaction for different configuration components was systematically investigated,and the reforming reaction path of different configuration components on this catalyst was described.The results show that the introduction of Pt in liquid phase reduction method can make the bimetallic catalyst have suitable acidity and good Ni metal dispersion.The synergistic effect of Ni-Pt can not only improve the activity of single Ni catalyst,but also reduce Ni sintering and optimize the stability of catalyst.In addition,the reforming properties of different configuration com-ponents on bimetallic catalysts are significantly different.Among the three hydrocarbon fuels,the gas yield and H,selectivity of n-decane reforming are superior.Due to the weak C-C bond energy of methylcyclohexane in the reaction process,ethylbenzene is easy to open the ring to form chain free radicals and reform with water.Ethylbenzene has an aromatic hydrocarbon structure and is not easy to open the ring,so the reforming reaction requires high energy.
作者
张菲依
王晨臣
李煜
张波
陈昱江
张琛琦
郑锦泓
焦毅
鲍泽威
ZHANG Fei-yi;WANG Chen-chen;LI Yu;ZHANG Bo;CHEN Yu-jang;ZHANG Chen-qi;ZHENG Jin-hong;JIAO Yi;BAO Ze-wei(School of Chemical Engineering,Sichuan University,Chengdu 610064,China;Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration,AVIC Nanjing Engineering Institute of Aircraft System,Nanjing 211106,China;Science and Technology on Scramjet Laboratory,Beijing Power Machinery Institute,Beijing 100074,China;Institute of New Energy and Low-Carbon Technology,Sichuan University,Chengdu 610064,China)
出处
《化学研究与应用》
CAS
北大核心
2024年第6期1286-1294,共9页
Chemical Research and Application
基金
航空科学基金(20200028019001)
企业横向委托技术开发项目(FJF22KX055)资助。
关键词
燃油蒸汽重整
制氢
Ni-Pt双金属催化剂
不同构型烃类
液相还原法
steam reforming
hydrogen production
Ni-Pt bimetallic catalyst
hydrocarbons with different configurations
liquid phase reduction method
