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以溶胶凝胶法制备了纳米级的Mn-Ce/Ti-CNTs催化剂粉体,考察了有机膨润土,复合硅酸盐水泥,模数为3.6的硅酸钠以及这三种组合的粘结剂对板状催化剂的粘结度、防水性能和脱硝性能的影响。结果表明,单一复合硅酸盐水泥或硅酸钠粘结剂粘结度都不够,单一有机膨润土粘结剂防水性能差;随着粘结剂含量的增多,脱硝性能也相应降低;复合硅酸盐水泥对催化性能的影响小于硅酸钠。优化后得到,6(w)%有机膨润土+12(w)9,6复合硅酸盐水泥组合的粘结剂,不但能满足一定的粘结度和防水性能。而日拥有最好的脱硝件能。存175℃时,其脱硝忡能可诀80%。250℃的脱硝件能可诀98%以上。

Organo-bentonite, composite portland cement, sodium silicate (3.6 modulus) and their complexes were selected as binders for the formation of pilot scale laminated catalyst of nano-sized MnOx- CeOx/TiO2-CNTs powder prepared by sol-gel method. Effects of different binders on the catalyst adhesion, anti- water solubility and de-NOx activity were studied systematically. Our results indicated that the catalysts formation using composite portland cement and sodium silicate showed sodium silicate decreased the catalyst activity severely. poor adhesions, with a decrease of de-NOx activity, especially The addition of organo-bentonite promoted the catalyst adhesion evidently and kept high de-NOx activity, but exhibited a poor anti-water solubility. By optimizing the binder using their complexes, we found that a binder combination of 6w% organo-bentonite and 12w% composite portland cement showed the highest de-NOx acfvity with good adhesion and waterproof performance, such that a NOx conversion of 80% and 98G were achieved at 175℃ and250℃, respectively.

参考文献

[1] Katariina Rahkamaa-Tolonen;Teuvo Maunula;Mari Lomma;Mika Huuhtanen;Riitta L.Keiski .The effect of NO_2 on the activity of fresh and aged zeolite catalysts in the NH_3-SCR reaction[J].Catalysis Today,2005(3/4):217-222.
[2] Jan Kaspar;Paolo Fornasiero;Neal Hickey .Automotive catalytic converters:current status and some perspectives[J].Catalysis Today,2003,77(04):419-449.
[3] 李伟,林涛,张秋林,龚茂初,陈耀强.整体式MnOx-CeO2/ZrO2-TiO2催化剂用于NH3低温选择性催化还原NO[J].催化学报,2009(02):104-110.
[4] Raziyeh Khodayari;C.U.Ingemar Odenbrand .Regeneration of commercial TiO_2-V_2O_5-WO_3 SCR catlysts used in bio fuel plants[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2001(1/2):87-99.
[5] Wood S.C .Select the right NO,control technology[J].Chemical Engineering Progress,1994,90:32-38.
[6] 沈岳松,祝社民,丘泰,沈树宝.Ti-Zr-V-O复合催化材料的制备及其选择性催化还原NO[J].无机材料学报,2009(03):457-462.
[7] 黄海风;张峰;卢晗锋 等.制备方法对低温NH-SCR脱硝催化剂MnO,/TiO2结构与性能的影响[J].化工学报,2010,61(01):80-85.
[8] 刘炜,童志权,罗婕.Ce-Mn/TiO2催化剂选择性催化还原NO的低温活性及抗毒化性能[J].环境科学学报,2006(08):1240-1245.
[9] 郭风;余剑;朱剑虹 等.Mn-Fe-Ce/Tioz低温NH2选择性催化还原NO[J].过程工程学报,2009,9(06):1192-1197.
[10] 伍斌,黄妍,郑毅,童志权.SO2 对Mn-Cu-Ce/TiO2 低温选择催化还原NO的影响[J].环境科学学报,2008(05):960-964.
[11] Ruiben Jin;Yue Liu;Zhongbiao Wu et al.between SO2 poisoning effects and reaction selective catalytic reduction of NO over Mn al.Relationship temperature for Ce/TiO2 catalyst[J].Catalysis Today,2010,153(3-4):84-89.
[12] Zhongbiao Wu;Ruiben Jin;Haiqiang Wang .Effect of ceria doping on SO2 resistance of Mn/TiO2 for selective catalytic reduction of NO with NH3 at low temperature[J].Catalysis Communications,2009(6):935-939.
[13] Philippe Serp;Massimiliano Corrias;Philippe Kalck .Carbon nanotubes and nanofibers in catalysis[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2003(2):337-358.
[14] Bichun Huang;Rong Huang;Dongjie Jin .Low temperature SCR of NO with NH3 over carbon nanotubes supported vanadium oxides[J].Catalysis Today,2007(3/4):279-283.
[15] 罗瑶,李彩亭,路培,李群,柯琪,田立辉.新型MnOx/CNTs催化剂低温选择性催化还原NO[J].环境工程学报,2009(10):1844-1847.
[16] 白书立,赵江红,王丽,朱珍平.V_2O_5/CNTs 催化剂低温NH_3选择催化还原NO的研究[J].燃料化学学报,2009(05):583-587.
[17] Xiaoyu Fan;Famin Qiu;Hangsheng Yang .Selective catalytic reduction of NO_x with ammonia over Mn-Ce-O_x/TiO2-carbon nanotube composites[J].Catalysis Communications,2011(14):1298-1301.
[18] 李锋 .以纳米TiO<,2>为载体的燃煤烟气脱硝SCR催化剂的研究[D].东南大学,2006.
[19] Jitianu Andrei;Caeeiaguerra Tjomas;Benoit Roland et al.Synthesis and characterization of carbon nanotubes-TiO2 nanoeomposites[J].Carbon,2006,42(5-6):1147-1151.
[20] Marco Baldi;Vicente Sanchez Escribano;Jos Amanuel Gallardo Amores et al.Characterization of manganese and iron oxides as combustion catalysts for propane and propene[J].Applied Catalysis B:Environmental,1998,17(03):175-182.
[21] Jose Manuel Gallardo-Amores;Tiziana Armaroli;Gianguido Ramis;Elisabetta Finocchio;Guido Busca .A study of anatase-supported Mn oxide as catalysts for 2-propanol oxidation[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,1999(4):249-259.
[22] 王艳莉,刘振宇.粘结剂对蜂窝状V2O5/ACH同时脱硫脱硝活性的影响[J].过程工程学报,2009(04):701-706.
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