载体对W基催化剂及其催化合成甲硫醇的影响

Effect of Different Supports on W-based Catalysts and Methanthiol Catalytic Synthesis

利用浸渍法,以K2WO4为活性组分,研究了不同载体制得W基催化剂孔结构、表面化学性质及催化性能。采用BET和化学吸附法等手段对催化剂的孔结构特征和表面化学性质进行了分析表征,催化剂于甲醇-硫化氢体系进行催化性能评价。研究结果表明,不同载体对制得W基催化剂孔结构、表面化学性质及催化性能具有较大的影响;以γ-Al2O3为载体,活性组分K2WO4负载质量分数6%时,制得K2WO4(6%)/γ-Al2O3催化剂表面弱碱量较大、比表面积为215.412 m2·g-1、孔容最大为0.6345 cm3·g-1、CH3SH选择性和收率分别达最大,90.12%和72.65%。

Using K2WO4 as active component, pore structure, surface chemical property and catalytic perform- ance of W-based catalysts prepared with different carriers through impregnation method were studied. With the characterization methods of BET and chemical adsorption, pore structure and surface chemical properties of cata- lysts were analyzed, catalytic performance were evaluated in methanol- hydrogen sulfide system as well. Results show that carriers had great effects on pore structure, surface chemical properties and catalytic performance. When using γ-Al2O3 as catalyst carrier, and the loading content of active component K2WO4 was 6%, K2WO4 （6%） / γ-Al2O3 catalyst showed larger surface base amount, and its specific surface area was 215. 412 m^2· g^-1, maximum pore volume was 0.6345 cm^3 · g^-1, selectivity and yield of CH3SH got 90.12% and 72.65% respectively.