过渡金属、Zr、Ce三元SCR催化剂的制备和性能

发布时间：2017-12-28 01:12

本文关键词：过渡金属、Zr、Ce三元SCR催化剂的制备和性能　出处：《材料研究学报》2016年02期 　论文类型：期刊论文

【摘要】：制备了由过渡金属M(M=Cr、Mn、V、Fe、Cu、Co)与Zr、Ce氧化物组成的三元选择性催化还原(SCR)催化剂,用低温氮吸附(BET)、X射线衍射分析(XRD)、X射线光电子能谱(XPS)、氨-程序升温脱附(NH3-TPD)、氢-程序升温还原(H2-TPR)等手段表征了样品的比表面和孔结构、晶体结构、元素价态、酸性位类型以及氧化还原能力,研究了催化剂的性能。结果表明,MnZr-Ce三元催化剂的低温(200℃)活性较好,但是高温(250℃)活性较差;Cr-Zr-Ce三元催化剂在低温和高温(100-300℃)下性能均比较稳定,V-Zr-Ce三元催化剂在低温(200℃)下性能较差,但是其高温(300℃左右)活性不断提高。研究了以上3种催化剂的耐硫性,并结合测试结果解释和分析了上述实验现象。
[Abstract]:Prepared by transition metal M (M=Cr, Mn, V, Fe, Cu, Co) three yuan, Zr composition and selective catalytic reduction of Ce oxide (SCR) catalyst with low temperature nitrogen adsorption (BET), X ray diffraction (XRD), X ray photoelectron spectroscopy (XPS) and ammonia temperature programmed desorption (NH3-TPD), hydrogen temperature programmed reduction (H2-TPR) method to characterize the surface area and pore structure, crystal structure, element valence, acid type and redox ability of the catalyst performance. The results show that the MnZr-Ce three catalysts at low temperature (200 DEG C) good activity, but high temperature (250 DEG C) poor activity; Cr-Zr-Ce three catalyst in low temperature and high temperature (100-300 DEG C) properties were stable, V-Zr-Ce three catalysts at low temperature (200 DEG C) under poor performance, but its high temperature (about 300 DEG C continuously improve the activity). The sulfur tolerance of the above 3 catalysts was studied, and the above experimental phenomena were explained and analyzed in combination with the test results.
【作者单位】：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;
【基金】：中国科学院先导专项B(XDB05050400) 国家自然科学基金21107111 中国科学院知识创新工程重要方向项目KZCX2-EW-403资助~~
【分类号】：O643.36
【正文快照】： Preparation and Characterization of Ternary SCR CatalystsConsisted of Transition Metal Oxide,Zirconia and CeiraLIU Haidi**LI Weiman LI Wenhui CHEN Yunfa(State Key Laboratory of Multiphase Complex Systems,Institute of Process Engineering,Chinese Academy o

【相似文献】