Pt/γ-Al_(2)O_(3)催化剂低温催化甲醇氧化研究  

Preparation of Pt/γ-Al_(2)O_(3)by Rotary Microemulsion Method for Catalytic Oxidation of Methanol

作　　者：高伟 曾欣 李金晓 杨春花 王雅琪 李谡民 吕爽 潘立卫[1] GAO Wei;ZENG Xin;LI Jinxiao;YANG Chunhua;WANG Yaqi;LI Sumin;LÜShuang;PAN Liwei(School of Environmental and Chemical Engineering,Dalian University,Dalian Liaoning 116622,China;PetroChina Natural Gas Sales Hubei Branch,Wuhan Hubei 430077,China)

机构地区：[1]大连大学环境与化学工程学院,辽宁大连116622 [2]中国石油天然气股份有限公司天然气销售湖北分公司,湖北武汉430077

出　　处：《辽宁石油化工大学学报》2023年第6期44-47,共4页Journal of Liaoning Petrochemical University

基　　金：国家重点研发计划项目(2020YFB1506301);大连市科技创新基金项目(2022JJ12GX021)。

摘　　要：在甲醇自热重整反应中,所需的热量由甲醇氧化反应提供,因此甲醇氧化催化剂的活性直接影响氢气的产率。Pt/γ-Al_(2)O_(3)催化剂因其较高的反应活性而被广泛关注,但其稳定性较差,Pt活性中心易团聚。为了解决上述问题,采用旋蒸微乳法制备Pt/γ-Al_(2)O_(3)催化剂,通过BET、XRD等方法对Pt/γ-Al_(2)O_(3)催化剂进行了表征,并考察了环己烷质量分数、PEG-600(聚乙二醇600)与正丁醇的质量比对催化甲醇氧化活性的影响。结果表明,旋蒸微乳法可提高活性组分的分散度和利用率;通过改变环己烷质量分数、PEG-600与正丁醇的质量比,可使活性组分Pt均匀、牢固地负载在γ-Al_(2)O_(3)上,提高催化剂的抗烧结能力;在环己烷质量分数为50%、PEG-600与正丁醇的质量比为3∶7的条件下制备的Pt/γ-Al_(2)O_(3)催化剂,催化甲醇氧化活性可达88%。In the methanol autothermal reforming reaction,the required heat is provided by the methanol oxidation reaction,so the activity of the methanol oxidation catalyst directly affects the yield of hydrogen.Pt/γ-Al_(2)O_(3)catalysts have attracted wide attention because of its high reactivity,but their stability is poor,and the Pt activity center is easy to agglomerate.In order to solve the above problems,Pt/γ-Al_(2)O_(3)catalysts were prepared by rotary microemulsion,and Pt/γ-Al_(2)O_(3)catalysts were characterized by BET,XRD and other methods,and the effects of cyclohexane mass fraction,mass ratio of PEG-600 and n-butanol on the oxidation activity of methanol were investigated.The results show that the microemulsion method could improve the dispersion and utilization rate of the active components.By changing the mass fraction of cyclohexane and the mass ratio of PEG-600 to n-butanol,the active component Pt can be uniformly and firmly loaded onγ-Al_(2)O_(3),and the sintering resistance of the catalyst can be improved.The Pt/γ-Al_(2)O_(3)catalyst prepared under the condition of cyclohexane mass fraction of 50%and the mass ratio of PEG-600 to n-butanol is 3∶7,and the catalytic activity of methanol oxidation can reach 88%.

关 键 词：甲醇氧化 旋蒸微乳法 自热重整 催化氧化 Pt基催化剂 

分 类 号：TQ9[化学工程] O64[理学—物理化学]