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Preparation and Characterization of Modified-ZrO_2 Catalysts for the Reaction of CO Hydrogenation 被引量:1
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作者 QingjieGe a.kiennemann +2 位作者 A.C.Roger WenzhaoLi HengyongXu 《Journal of Natural Gas Chemistry》 CAS CSCD 2004年第1期41-44,共4页
ZrO2 in different structures and CexZr4-xO8 solid solutions have been prepared by a sol-gel related method with propionic acid as the solvent. The results of their characterization and CO hydro-genation performance ev... ZrO2 in different structures and CexZr4-xO8 solid solutions have been prepared by a sol-gel related method with propionic acid as the solvent. The results of their characterization and CO hydro-genation performance evaluation show that t-ZrO2 has better catalytic performance for CO hydrogenation to hydrocarbon than m-ZrO2. Cerium (Ⅲ) acetate and zirconium (Ⅳ) acetylacetonate have been chosen as the most suitable starting materials for CexZr4-xO8 solid solution preparation. Ce-Zr reducibility properties are increased by the incorporation of zirconium oxide in the ceria structure. Ce2Zr2O8 exhibits a higher activity, lower methane selectivity and higher iso-C4 selectivity than tetragonal ZrO2. This implies that the formation mechanism of C4 hydrocarbons, especially that for the iso-C4 fraction is different over Ce2Zr2O8 and t-ZrO2. 展开更多
关键词 CexZr4-xO8 solid solution sol-gel related method carbon monoxide HYDROGENATION hydrocarbons
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CoCuY催化体系上MoO_x的助剂作用和协同效应的研究
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作者 储伟 a.kiennemann +1 位作者 R.KIEFER 熊国兴 《分子催化》 EI CAS CSCD 1993年第3期218-226,共9页
在6MPa的条件下合成气反应的结果表明,为了获得良好的混合醇产率和选择性,铜、钴和钼的协同并存是重要的.CoCuY催化剂上MoO_x的加入显著提高了甲醇和高级醇的产率.在280℃的反应温度下,获得了175g/kg cat/h的混合醇产率,内含45wt%的高级... 在6MPa的条件下合成气反应的结果表明,为了获得良好的混合醇产率和选择性,铜、钴和钼的协同并存是重要的.CoCuY催化剂上MoO_x的加入显著提高了甲醇和高级醇的产率.在280℃的反应温度下,获得了175g/kg cat/h的混合醇产率,内含45wt%的高级醇.在Mo/CoCuY催化剂中,钴、铜和钼的氧化物之间具有强的相互作用和协同还原效应.XRD的结果表明,在合成气反应中助剂MoO_x的存在稳定了催化剂中的Y_2O_3晶相结构,减少了其无定形分散. 展开更多
关键词 催化剂 氧化钼 合成气 甲醇
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