期刊文献+

过渡金属离子复合掺杂的六铝酸盐催化剂的脱硝性能 被引量:2

Denitrification properties of hexaaluminates co-doped with different transition metals
下载PDF
导出
摘要 采用CO为还原气催化还原NO,考察了Mn与Fe复合掺杂六铝酸盐对催化剂结构和NO+CO反应活性的影响,采用X射线衍射(XRD)、比表面积、H2-程序升温还原(H2-TPR)等对形成的SrMnFexAl11-xO19-δ系列催化剂(x为铁的掺杂量,x为1、2、4、6、8;δ为校正系数,在多数情况下小于0.5)进行表征。结果表明:(1)Fe的掺杂量较少时,样品形成了较为完整的六铝酸盐结构,Fe掺杂量继续增加反而不利于六铝酸盐晶胞的形成;(2)随着Fe掺杂量的增加,产生单体Fe2O3,六铝酸盐的还原性变差,不利于提高催化活性;(3)SrMnFexAl11-xO19-δ系列催化剂具有较好的热稳定性,当反应温度达到800℃时,仍具有极高的催化活性,可适用在高温环境下进行脱硝反应;(4)SrMnFexAl11-xO19-δ系列催化剂可用于化工厂中烟气的脱硝过程,并可以利用重整过程中的气体再生。 Series of hexaaluminate catalysts SrMnFexAl11-xO19-δ(x was Fe adopting quantity,x =1,2,4,6,8,δ was adjusting coefficient) was prepared by coprecipitation method,the obtained catalysts was applied for catalyzed NO reduction with CO as reducing gas.The SrMnFexAl11-xO19-δ were characterized by powder X-ray diffraction(XRD),surface area and pore structure determination(BET),hydrogen temperature programmed reduction(H2-TPR) to investigate the effect of Mn and Fe adopting on structure and property of catalyst.Results showed that the relatively complete structure of hexaaluminate was formed when the Fe dulteration amount was low;Fe2O3 would be produced when increasing the Fe dulteration amount,which was not conducive to form hexaaluminate conventional cell.The SrMnFexAl11-xO19-δ catalysts showed perfect thermal stability in CO+NO reaction and the catalysis activities was high especially even the temperature was higher than 800 ℃.Therefore,this kind of catalysis could be used in flue gas denitrification and gas regeneration.
出处 《环境污染与防治》 CAS CSCD 北大核心 2011年第9期4-7,共4页 Environmental Pollution & Control
基金 国家自然科学基金资助项目(No.21076025)
关键词 NO 六铝酸盐催化剂 CO还原 催化活性 NO hexaaluminate catalysts CO reduction catalytic activity
  • 相关文献

参考文献13

二级参考文献72

共引文献92

同被引文献20

  • 1董国君,韩成喜,张浩,刘玺.堇青石蜂窝陶瓷载CuO选择催化还原NO的研究[J].工业催化,2007,15(3):62-65. 被引量:5
  • 2贾毅峰,兰雯.浅谈氮氧化物的污染与治理技术[J].广西轻工业,2007,23(9):98-99. 被引量:6
  • 3Ferreira A P, Capela S, Da Costa P, et al. Air Pollution Abatement Catalysis (APAC) Symposium CH4-SCR of NO over Co and Pd ferrierite catalysts: Effect of preparation on catalytic performance [J]. Catalysis Today, 2007, 119(1-4): 156-165.
  • 4Xue Xuye, Lu Guanzhong, Guo Yun,et al. Effect of pretreatment method of activated carbon on the catalytic reduction of NO by carbon over CuO[J]. Applied Catalysis B: Environmental, 2008,79(3):262-269.
  • 5《石油炼制与化工》编辑部. 流化催化裂化手册[M]. 北京:中国石化出版社,2002:120.
  • 6Masato Maehida, Koiehi Eguchi, Hiromiehi Arai. Effect of additives on the surface area of oxide supports for catalytic combustion[J]. Journal of Catalysis, 1987, 103:385-393.
  • 7Svensson E E, Boutonnet M, J?r?s S G. Stability of hexaaluminate-based catalysts for high-temperature catalytic combustion of methane[J].Applied Catalysis B: Environmental, 2008, 84(1-2): 241-250.
  • 8Tian M, Wang A Q, Wang X D, et al. Effect of large cations (La^3+ and Ba^2+) on the catalytic performance of Mn-substituted hexaaluminates for N2O decomposition[J].Applied Catalysis B: Environmental, 2009, 92(3-4): 437-444.
  • 9Bukhtiyarova M V, IvanovaA S, Plyasova L M, et al. Selective catalytic reduction of nitrogen oxide by ammonia on Mn(Fe)-substituted Sr(La) aluminates[J].Applied Catalysis A: General, 2009, 357(2):193-205.
  • 10Groppi G, Assandri F, Bellotto M, et al. The crystal structure of Ba-β-alumina materials for high-temperature catalytic combustion[J]. Journal of Solid State Chemistry, 1995, 114(2):326-336.

引证文献2

二级引证文献3

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部