镍钨基硫化态和氮化态催化剂对十氢萘选择性开环性能研究  

Study on performance of Ni-W based sulfide and nitride catalysts for selective ring opening of decalin

作　　者：袁利静 马纪伟 崔昇 张莉 王潇潇[1] 孟现洁 YUAN Li-jing;MA Ji-wei;CUI Sheng;ZHANG Li;WANG Xiao-xiao;MENG Xian-jie(School of Energy&Materials Engineering,Taiyuan University of Science and Technology,Taiyuan 0300024,China;Laboratory of Applied Catalysis and Green Chemical Engineering,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030000,China;College of Chemical Engineering and Technology,Taiyuan University of Technology,Taiyuan 0300024,China)

机构地区：[1]太原科技大学能源与材料工程学院,山西太原030024 [2]中国科学院山西煤炭化学研究所应用催化与绿色化工实验室,山西太原030000 [3]太原理工大学化学工程与技术学院,山西太原030024

出　　处：《现代化工》2024年第7期151-155,共5页Modern Chemical Industry

基　　金：山西省揭榜招标项目(20201101012);山西省高等学校科技创新计划项目(2022L327);山西省高等学校科技创新项目(2020L0370);太原科技大学博士启动基金(20232124)

摘　　要：通过不同预处理方式制备镍钨硫化态和氮化态催化剂,利用X射线衍射、吡啶红外光谱、元素分析、CO滴定等技术对催化剂进行表征。以十氢萘为探针分子,利用固定床反应器考察不同预处理方式及负载量对催化剂十氢萘选择性开环反应转化率和寿命的影响规律。结果表明,氮化态催化剂初始转化率及选择性开环活性高,这与氮化态催化剂金属位活性高有关,但其稳定性低于硫化态催化剂,这是由于十氢萘在金属位脱氢后未能及时转移至酸性位开环,使其发生过度脱氢导致结焦失活。A series of nickel-tungsten sulfide and nickel-tungsten nitride catalysts are prepared by different pretreatment methods,and characterized by means of techniques such as XRD,Py-IR,HRTEM,elemental analysis,and CO titration.Using decalin as a probe molecule,the influences of different pretreatment methods and different loading amount on the performance of the catalyst for selective ring opening reaction of decalin are investigated in a fixed bed reactor.It is found that Ni-W nitride catalyst delivers higher initial conversion rate and selective ring opening activity than Ni-W sulfide catalyst,because the former has higher metal site activity.Ni-W nitride catalyst exhibits a lower stability than Ni-W sulfide catalyst,which is due to the delayed transfer of decalin to the acidic site for ring opening after dehydrogenation on the metal site.

关 键 词：镍钨催化剂 硫化态 氮化态 十氢萘选择性开环 

分 类 号：TQ426[化学工程]