Abstract: Using separately anatase and rutile TiO2 with similar specific surface areas as supporter,the catalysts supported vanadia and sulfate species are prepared.Their catalytic behaviors for the selective oxidation of methanol are evaluated and compared.It is found that anatase TiO2 supported vanadia catalyst exhibits superior redox and acidity properties than rutile TiO2 supported catalyst.Although these un-doped sulfate catalysts supported by two supporters exhibit a similar conversion of methanol oxidation at 433 K,total selectivity of formaldehyde and methyl formate for the anatase TiO2 based catalyst can reach 63%,higher than the 54% selectivity for rutile TiO2 based catalyst.Addition of sulfate further enhances the conversion of methanol and the selectivity to dimethoxymethane,which is more significant over rutile TiO2 based catalyst that can improve the selectivity of dimethoxymethane to as high as 88%.
刘经伟, 傅玉川, 沈俭一. 载体TiO2晶型对甲醇选择氧化性能的影响[J]. 现代化工, 2018, 38(8): 112-116.
LIU Jing-wei, FU Yu-Chuan, SHEN Jian-yi. Effect of TiO2 crystalline type on selective oxidation performance of methanol. Modern Chemical Industry, 2018, 38(8): 112-116.
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