用于低温液相合成甲醇的Cu/MgO/ZnO催化剂
Study on Cu/MgO/ZnO Catalyst for Low-temperature Synthesis of Methanol
查看参考文献23篇
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文摘
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采用并流共沉淀法制备了不同Cu: (Mg+Zn)及Mg: Zn摩尔比的铜基催化剂Cu/MgO/ZnO, 用于低温液相甲醇的合成, 并对比了Cu/ZnO及Cu/MgO催化剂, 分析了催化剂中载体MgO的作用.结果表明, MgO的引入有利于催化剂中Cu~+的生成并均匀分散在载体中, 可提高催化剂的催化活性.以合成气CO+H_2为原料, 在443 K和5.0 MPa条件下, 采用液体石蜡作溶剂, 考察了催化剂的催化性能.结果表明, Cu/MgO/ZnO催化剂的活性优于Cu/ZnO和Cu/MgO催化剂, 且当Cu: Mg: Zn=2: 1: 1时催化性能最好, 此时合成气中CO的转化率为63.56％, 甲醇的选择性为99.09％, 时空收率为5.413 mol/(kg·h).分析了Cu/MgO催化剂在高温反应条件下的失活现象, 认为铜烧结是其失活的主要原因 |
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其他语种文摘
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A series of Cu/MgO/ZnO catalysts with different Cu:(Mg+Zn) and Mg: Zn molar ratios were prepared by conventional cco-precipitation method, which are used for low-temperature methanol synthesis. And Cu/ZnO and Cu/MgO catalysts were prepared as well. Comparison was made among them by characterization. Addition of MgO to Cu/ZnO catalyst could introduce more dispersed Cu~+ sites, therefore the catalytic activity was promoted. At 443 K and 5.0 MPa, the activities of prepared catalysts were tested in a slurry reactor using liquid paraffin as solvent. The results indicated that the activity of Cu/MgO/ZnO catalyst was superior to that of Cu/ZnO and Cu/MgO, and when Cu: Mg: Zn=2:1:1, the catalyst had the highest activity: the conversion rate of CO was as high as 63.56%, and the selectivity and space time yield of methanol reached 99.09% and 5.413 mol/(kg·h) respectively. The deactivation phenomenon of Cu/MgO/ZnO catalyst was observed under high reaction temperature, and the characterization results indicated that it was due to the sintering of Cu particles |
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来源
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过程工程学报
,2010,10(4):781-787 【核心库】
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关键词
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低温
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液相
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甲醇
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合成气
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铜基催化剂
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地址
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中国科学院过程工程研究所, 多相复杂系统国家重点实验室, 北京, 100190
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1009-606X |
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学科
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化学工业 |
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基金
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国家自然科学基金国家杰出青年科学基金
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中国科学院知识创新工程领域前沿项目
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中国科学院知识创新工程重要方向项目
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国家973计划
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文献收藏号
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CSCD:3973020
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