摘要
采用气相流动吸附法制备TiO_2/γ-Al_2O_3复合载体,以TiO_2含量为0.18gTiO_2/gγ-Al_2O_3的样品为典型载体,用干混法和浸渍法制得MoO_3/TiO_2/γ-Al_2O_3催化剂。用XRD和LRS等技术研究了MoO_3在TiO_2/γ-Al_2O_3复合载体表面的分散状态和最大分散量。结果表明,在420℃下焙烧的催化剂,MoO_3在复合载体表面的最大分散量为0.24gMoO_3/gTiO_2/γ-Al_2O_3(相当于0.12gMoO_3/100m^2TiO_2/γ-Al_2O_3),最大分散量随催化剂焙烧温度的上升而增加。
A TiO_2/γ-Al_2O_3 complex support was prepared by a gas-flow continuum adsorption method. With a typical sample containing 0.18 g TiO_2/gγ-Al_2O as the support,MoO_3/gTiO_2/γ-Al_2O_3 catalysts were made by impregnation and dry mixed methods.XRD,LRS etc.techniques were employed in examining the maximum dispersion capacity and dispersion state.The data collected suggest that the maximum dispersion capacity of MoO_3 on the complex support surface is 0.24MoO_3/gTiO_2/γ-Al_2O_3(equivalent to 0.12MoO_3/100m^2TiO_2/γ-Al_2O_3)for the catalyst calcinated at 420℃.The maximum dispersion capacity is raised with the increase of catalyst calcination temperature.
出处
《天然气化工—C1化学与化工》
CAS
CSCD
北大核心
1992年第6期6-11,共6页
Natural Gas Chemical Industry
关键词
钼系
催化剂
加氢脱硫
复合载体
TiO_2/γ-Al_2O_3 complex support
Mobased catalyst
monolayer dispersion
maximum dispersion capacity
X-Ray diffraction quantitative nieasurement
Laser Raman spectroscopy
