| 孔秀琴,唐兴江,许珊,王晓来.溶胶-凝胶自燃烧法制备的CuO-ZnO/Al2O3及催化二氧化碳加氢制甲醇的性能研究[J].分子催化,2013,(2):159-165 |
| 溶胶-凝胶自燃烧法制备的CuO-ZnO/Al2O3及催化二氧化碳加氢制甲醇的性能研究 |
| Preparation of CuO-ZnO/Al2O3 by Sol-gel Auto-combustionMethod and Its Catalytic Property for Methanol Synthesis from CO2 Hydrogenation |
| 投稿时间：2012-12-11 修订日期：2013-02-13 |
| DOI： |
| 中文关键词: 孔秀琴, 唐兴江, 许珊, 王晓来 |
| 英文关键词:sol-gel auto-combustion citric acid CuO-ZnO/Al2O3 CO2 hydrogenation methanol. |
| 基金项目:电弧放电制备石墨烯负载纳米Cu基催化剂及其在CO2加氢制甲醇反应中催化性能的研究 |
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| 中文摘要: |
| 采用溶胶-凝胶自燃烧法,以柠檬酸为燃料制备了多种CuO-ZnO/Al2O3催化剂。利用N2静态吸附(BET)、X射线衍射(XRD)、扫描电子显微镜（SEM）、H2程序升温还原(H2-TPR)等方法研究了柠檬酸与硝酸盐比例关系对催化剂物化性质, 形貌和还原性能的影响。并将其用于二氧化碳加氢制甲醇反应，考察催化剂的CO2转化率，甲醇选择性以及甲醇时空收率等催化性能。实验结果表明，当柠檬酸用量等于化学计量比时，CuO-ZnO/Al2O3催化剂的催化性能最好，当柠檬酸用量大于化学计量比时，催化性能次之，且变化不大，但当柠檬酸用量小于化学计量比时，催化性能明显降低。这一结果与其物化性质和还原性能有关，当柠檬酸用量等于或大于化学计量比时，催化剂中CuO颗粒较小，分散均匀，且分散度高。 |
| 英文摘要: |
| Various CuO-ZnO/Al2O3 catalysts have been synthesized by citric acid sol-gel auto-combustion method and their performances for methanol synthesis from CO2 hydrogenation have been investigated. The effects of citric acid /nitrate ratio on physicochemical, morphologies and catalytic properties were studied by BET, XRD, SEM and H2-TPR. Catalytic activities of the prepared catalysts for methanol synthesis were tested in fixed-bed flow reactor. The results indicated that when 100% of stoichiometric amount of citric acid was used, the CuO-ZnO/Al2O3 catalyst exhibited an optimum catalytic behavior. The catalyst showed relatively smaller particle size, higher surface area and more uniform Cu dispersion. |
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