| 沉淀方式对微波辐射老化制备CuO/ZnO/Al2O3催化剂性能的影响 |
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| 引用本文： | 郑华艳,李博昱,刘岩,陈雄,李忠.沉淀方式对微波辐射老化制备CuO/ZnO/Al2O3催化剂性能的影响[J].燃料化学学报,2012,40(6):743-749. |
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| 作者姓名： | 郑华艳 李博昱 刘岩 陈雄 李忠 |
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| 作者单位： | 1. Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024;
2. Beijing University of Chemical Industry and Chemical Engineering, Beijing 100029 |
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| 基金项目： | 国家重点基础研究发展规划(973计划，国家自然科学基金青年项目 |
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| 摘 要： | 采用微波辐射老化沉淀母液的方法,着重考察了沉淀方式对制备的CuO/ZnO/Al2O3催化剂及其前驱体的结构和催化性能的影响。实验结果表明,沉淀方式对催化剂的活性和稳定性影响较大,其活性顺序为分步沉淀法二＞并流共沉淀法＞分步沉淀法一＞反加法＞正加法。通过XRD、DTG、H2-TPR等表征分析表明,先并流沉淀Al(NO3)3溶液和Na2CO3溶液,再并流沉淀Cu(NO3)2-Zn(NO3)2混合溶液与剩下的Na2CO3溶液,然后微波辐射老化所制备前驱体中含有更多的绿铜锌矿 (Cu,Zn)5 (CO3)2(OH)6物相,焙烧后形成的CuO-ZnO协同作用强,且CuO分散性好,H2还原温度较低,催化活性和稳定性也较高。
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| 关 键 词： | 微波辐射 CuO/ZnO/Al2O3催化剂 合成甲醇 沉淀方式 |
| 收稿时间： | 2011-08-19 |
Effects of precipitation manner on catalytic performance of CuO/ZnO/Al2O3 catalyst aging under microwave irradiation |
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| ZHENG Hua-yan
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LI Bo-yu
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LIU Yan
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CHEN Xiong
,
LI Zhong.Effects of precipitation manner on catalytic performance of CuO/ZnO/Al2O3 catalyst aging under microwave irradiation[J].Journal of Fuel Chemistry and Technology,2012,40(6):743-749. |
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| Authors: | ZHENG Hua-yan LI Bo-yu LIU Yan CHEN Xiong LI Zhong |
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| Institution: | 1(1.Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology,Taiyuan 030024; 2.Beijing University of Chemical Industry and Chemical Engineering,Beijing 100029) |
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| Abstract: | CuO/ZnO/Al2O3 precursors were prepared by different precipitation manner;microwave irradiation was introduced in aging process.The effects of precipitation manner on composition of precursor,micro structure and performance of catalyst were characterized by means of XRD,DTG,H2-TPR.The reaction results indicated that the order of catalytic activity was Stepwise II > Parallel-flow > Stepwise I > Reversed > Forward.When Al(NO3)3 solution and Na2CO3 solution were precipitated first and then Cu(NO3)2-Zn(NO3)2 solution were precipitated with remaining Na2CO3,the prepared precursor contained more(Cu,Zn)5(CO3)2(OH)6,which possessed well-dispersed CuO,strong synergy in CuO-ZnO and low H2-reduction temperature after calcination. |
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| Keywords: | microwave irradiation CuO/ZnO/Al2O3 catalyst methanol synthesis precipitation manner |
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