| 王丹君.共沉淀-蒸氨法制备Cu/ZnO/Al2O3催化剂上二氧化碳加氢制甲醇的研究[J].分子催化,2011,(2):124-129 |
| 共沉淀-蒸氨法制备Cu/ZnO/Al2O3催化剂上二氧化碳加氢制甲醇的研究 |
| Preparation of Cu/ZnO/Al2O3 catalyst via coprecipition-amonia evaporation for methanol synthesis from CO2 and H2 |
| 投稿时间：2011-04-01 修订日期：2011-04-03 |
| DOI： |
| 中文关键词: 甲醇合成 二氧化碳加氢 共沉淀-蒸氨 Cu/ZnO/Al2O3催化剂 |
| 英文关键词:methanol synthesis hydrogen of carbon dioxide coprecipitation-ammonia evaporation Cu/ZnO/Al2O3 catalyst |
| 基金项目:国家重点基础研究发展计划专项（973，No. 2011CB201404） |
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| 中文摘要: |
| 分别以碳酸铵为沉淀剂采用共沉淀-蒸氨法 (CAE)和以碳酸铵(CCA)、碳酸钠(CCS)为沉淀剂采用常规共沉淀法制备了三种Cu/ZnO/Al2O3催化剂，并运用XRD，BET，TPR和N2O滴定技术对催化剂进行了表征。结果表明：采用共沉淀-蒸氨法制备的催化剂具有较小的颗粒尺寸、较大的Cu(0)比表面积；以碳酸铵为沉淀剂常规沉淀法制备的催化剂尽管有最大的比表面积，但Cu(0)比表面积却相对较低；催化剂表面的Na+比NH4+难洗脱，残留Na+导致催化剂表面铜组分聚集，减小了Cu(0)的比表面积。二氧化碳加氢制甲醇的活性评价显示：甲醇收率随催化剂Cu(0)比表面积的增加而增加；CAE法制备的催化剂活性优于传统共沉淀方法制备的催化剂。 |
| 英文摘要: |
| Cu/ZnO/Al2O3 catalyst was prepared by coprecipition-amonia evaporation (CAE) method using ammonium carbonate as precipitating agent. The reference catalysts were prepared by conventional coprecipitation using ammonium carbonate (CCA) and sodium carbonate (CCS) as precipitating agents. XRD, BET, TPR and N2O titration technology were employed to investigate the structure and surface performance of the catalysts. The CAE-derived catalyst showed relatively smaller particle size and higher specific Cu (0) surface area. The CCA-derived catalyst displayed the highest total surface area, but the specific Cu (0) surface area was relatively lower. The residual Na+ was more difficult to be removed than NH4+, and facilely led to the agglomeration of Cu resulting in the lower specific Cu(0) surface area. The catalytic performance of CAE catalyst was better than others, resulting from the higher specific Cu(0) surface area. |
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