载体表面性质对Cu／ZrO2催化剂CO加氢反应行为的影响  

Effect of zirconia surface properties on the catalytic performance of Cu/ZrO_2 for CO hydrogenation

作　　者：马中义[1] 杨成[2] 周玮[1] 张德胜[1] 李正[1] 魏伟[2] 孙予罕[2] 

机构地区：[1]中国石油吉林石化公司研究院,吉林吉林132021 [2]中国科学院山西煤炭化学研究所煤转化国家重点实验室,山西太原030001

出　　处：《燃料化学学报》2009年第2期217-221,共5页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(20590363)

摘　　要：用XRD、LRS、NH3-TPD、CO2-TPD和CO-FTIR等表征手段考察了不同温度焙烧的氧化锆表面性质的差别,特别是表面酸碱性的差异对Cu/ZrO2催化剂CO加氢反应行为的影响。结果表明,不同温度焙烧的氧化锆表面酸碱性具有较大的差异,其中以450℃焙烧的氧化锆具有较高的表面碱性和最低酸性。这些表面性质的差异对于Cu/ZrO2催化剂的CO吸附行为产生较大的影响,进而影响CO的加氢反应活性。以450℃焙烧的氧化锆为载体时,Cu/ZrO2催化剂具有较好的反应活性。The surface properties of zirconia calcined at different temperatures were characterized by XRD, LRS, NH3-TPD, CO2-TPD and CO-FTIR. The effect of zirconia surface properties on the catalytic performance of Cu/ ZrO2 in CO hydrogenation was investigated. The results indicated that the surface properties of zirconia support, especially the surface base-acid properties, are affected significantly by the calcination temperature; the zirconia calcined at 450 ℃ exhibits high basicity and low acidity. The support surface properties also exhibit a great influence on the performance of Cu/ZrO2 catalyst for CO adsorption and CO hydrogenation. An active Cu/ZrO2 catalyst for CO hydrogenation can be obtained with zirconia calcined at 450 ℃ as the support.

关 键 词：表面性质 氧化锆 Cu/ZrO2 CO加氢 CO吸附 

分 类 号：O643[理学—物理化学]