铝基类水滑石和复合氧化物负载Pt催化剂的制备及对甲基苯酚加氢脱氧反应的催化性能（英文）  

Preparation of Al-based layered double hydroxides and corresponding mixed oxides supported Pt catalysts and their performance in the hydrodeoxygenation of p-cresol

作　　者：刘艳[1,2] 朱国华 仵奎 李文松 王威燕[1] 杨运泉[1] LIU Yan;ZHU Guo-hua;WU Kui;LI Wen-song;WANG Wei-yan;YANG Yun-quan(School of Chemical Engineering,Xiangtan University,Xiangtan 411105,China;School of Chemical and Material Engineering,Huaihua University,Huaihua 418000,China)

机构地区：[1]湘潭大学化工学院,湖南湘潭411105 [2]怀化学院化学与材料工程学院,湖南怀化418000

出　　处：《燃料化学学报》2018年第10期1193-1201,共9页Journal of Fuel Chemistry and Technology

基　　金：supported by the National Natural Science Foundation of China(21776236,21676225);Natural Science Foundation of Hunan Province(2018JJ2384);the Scientific Research Foundation of Huaihua University(HHUY2017-08);Collaborative Innovation Centre of New Chemical Technologies for Environmental Benignity and Efficient Resource Utilization

摘　　要：采用共沉淀法制备了多种铝基类水滑石,焙烧后得到对应的复合氧化物;以水滑石或复合氧化物为载体,制备了系列Pt基催化剂,研究了该催化剂对甲基苯酚加氢脱氧反应的催化性能。结果表明,Pt基催化剂的性能与载体的组分组成和结构相关;当以不经焙烧的类水滑石做载体时,所制备的Pt基催化剂具有较高的活性。其中,Pt-Ni-Al-H催化剂的加氢脱氧活性最高,对甲基苯酚转化率达到99.8%,甲苯选择性为1.4%,而Pt-Zn-Al-H催化剂的直接脱氧活性最高,在275℃和氢压2 MPa下反应1 h后,甲苯选择性达到84.1%。研究发现,反应过程中所生成的甲基环己烷可进一步发生脱氢反应转化为甲苯,说明所制备的Pt基催化剂具有较好的脱氢活性,可节省脱氧过程中的氢气消耗量。Al-based layered double hydroxides and corresponding mixed oxides were prepared and used as the supports for the Pt based catalysts;their catalytic performance in the hydrodeoxygenation(HDO)of p-cresol was then investigated.The results indicate that the catalytic performance of Pt based catalysts is related to the composition and structure of the support;Pt directly supported on the Al-based layered double hydroxides exhibits higher activity in p-cresol HDO than that supported on corresponding mixed oxides.Especially,for the HDO at 275℃and 2 MPa for 1 h,the conversion of p-cresol over Pt-Ni-Al-H is 99.8%,with a selectivity of 1.4%to toluene,whereas the selectivity to toluene over Pt-Zn-Al-H reaches 84.1%.Moreover,the Pt based catalysts are also active for the dehydrogenation of methylcyclohexane to toluene,which can effectively reduce the hydrogen consumption in HDO.

关 键 词：Pt 加氢脱氧 对甲苯酚 水滑石 混合金属氧化物 脱氢作用 

分 类 号：O643[理学—物理化学]