Fe掺杂对Pt-Sn-K/γ-Al_2O_3异丁烷脱氢催化剂性能的影响  

Effects of Fe doping on the performance of Pt-Sn-K/γ-Al_2O_3 catalyst for isobutane dehydrogenation

作　　者：荣欣[1,2] 时宇[1,2] 李先如[1,2] 顾彬[1,2] 于杨[1,2] 孙承林[1] 

机构地区：[1]中国科学院大连化学物理研究所洁净能源国家实验室,辽宁大连116023 [2]中国科学院大学,北京100049

出　　处：《工业催化》2016年第4期48-54,共7页Industrial Catalysis

摘　　要：采用共沉淀法制备不同Fe含量的Fe(x)-γ-Al_2O_3复合氧化物载体,并采用真空浸渍法制备了Pt-Sn-K/Fe(x)-γ-Al_2O_3催化剂。对制备的催化剂进行XRD、N_2物理吸附-脱附和NH_3-TPD表征,研究Fe的掺杂对Pt-Sn-K/Fe(x)-γ-Al_2O_3催化剂的结构及其催化异丁烷脱氢反应性能的影响。结果表明,Fe的引入可以改变催化剂的反应活性和产物选择性,当Fe_2O_3掺杂质量分数为4%时,催化剂具有最高的异丁烯收率,50 h的平均收率达到42.9%。A series of Fe（x）-γ-Al2O3 carriers with different contents of Fe were prepared by coprecipitation method. Pt-Sn-K/Fe（x）-γ-Al2O3 catalysts were prepared by vacuum impregnation method and characterized by XRD, N2-physisorption and NH3-TPD methods. The effects of Fe doping on the structure and catalytic properties of Pt-Sn-K/Fe（x）γ-Al2O3 catalysts for isobutane dehydrogenation were investigated. The results showed that the addition of Fe changed the reactivity of the catalyst and the selectivity to the product. When the doping mass fraction of Fe2O3 was 4% ,the catalyst possessed the optimal isobutene yield, and isobutene average yield was 42.9% for reaction 50 h.

关 键 词：催化化学 FE掺杂 Pt—Sn—K/Fe(x)-γ-Al2O3催化剂 共沉淀 异丁烷脱氢 

分 类 号：TQ426.4[化学工程] O643.36[理学—物理化学]