中文摘要：

制备了中孔分子筛SBA-15,以SBA-15为载体采用真空浸渍法制备了负载型Ru基水煤气变换反应的催化剂。利用透射电子显微镜、X-射线粉末衍射等方法对样品进行了表征。结果表明,合成的SBA-15分子筛孔径约为8 nm,粒径约为1 nm的Ru纳米粒子均匀分布在分子筛孔道中,添加适量的La2O3助剂可以显著提高催化剂的低温活性。当Ru和La2O3的负载量分别为4%和8%时,R4L8/SBA-15催化剂对CO转化率在255℃和265℃下分别达到56%和98%。

英文摘要：

The supported Ru-based catalyst promoted by lanthanum oxide was prepared by impregnating the SBA-15 carrier with aqueous Ru（Ac）3 and La（NO3）3 solution using vacuum absorbing method.The as-prepared catalysts were investigated by means of X-ray powder diffraction,transmission electron microscopy,and catalytic activity measurement for water-gas shift reaction.SBA-15 silica synthesized with P123 by reaction at 80 ℃ for 24 h proved to be a mesoporous product with a mean pore size of 8 nm.Metallic Ru was well dispersed on SBA-15 carrier as nanoparticles in 1 nm size.The results indicated that the optimized content of ruthenium and lanthanum oxide in catalyst is 4% and 8%,respectively.Under conditions of SV=2 000 h-1 and Vsteam/Vgas=1,the CO conversion is 56% at 255 ℃ and 98% at 265 ℃ for catalyst R4L8/SBA-15.