采用浸渍法制备了Al2O3负载的5种过渡金属氧化物催化剂,考察了它们在常温下催化臭氧氧化甲苯的性能,并运用程序升温还原、程序升温氧化、N2吸附-脱附和X射线光电子能谱对催化剂进行了表征.结果表明,NiO/Al2O3,CoO/Al2O3和MnO2/Al2O3催化剂上活性氧中心数量较少,臭氧与甲苯转化率较高;而Fe2O3/Al2O3和CuO/Al2O3催化剂上则相反.催化降解臭氧效率较高的催化剂上甲苯转化率也较高,在本文实验条件下,CO2产率低于30%.当甲苯浓度为666 mg/m3,O3浓度从193mg/m3提高至965mg/m3时,甲苯转化率从15.2%提高至46.7%,并且使反应后催化剂表面产物和晶格氧含量增加.原位漫反射红外光谱研究发现,反应过程中生成了含COO-,C=O和C-O官能团的物质,O3浓度的提高加速了COO-向C=O与C-O的转化,前者在573KO2气氛下几乎不发生反应,而后者在373K开始分解.基于此,提出了常温下臭氧催化氧化甲苯的反应机理.
参考文献
[1] | Durme J V;Duwulf J;Leys C;Langenhove H V .[J].Applied Catalysis B:Environmental,2008,78:324. |
[2] | Chen H L;Lee H M;Chen S H;Chang M B Yu S J Li S N .[J].Environmental Science and Technology,2009,43:2216. |
[3] | Guo Y F;Ye D Q;Chen K F;He J C Chen W L .[J].Journal of Molecular Catalysis A:Chemical,2006,245:93. |
[4] | 关绣娟,叶代启,黄海保.介质阻挡放电-催化降解空气中甲苯的研究[J].环境工程学报,2008(07):977-982. |
[5] | Jarrige J;Vervisch P .[J].Applied Catalysis B:Environmental,2009,90:74. |
[6] | 黄炯,杨利娴,龙丽萍,冯发达,付名利,吴军良,黄碧纯,叶代启.介质阻挡放电联合催化臭氧化降解甲苯[J].环境工程学报,2010(06):1373-1378. |
[7] | Naydenov A;Mehandjiev D .[J].Applied Catalysis A:General,1993,97:17. |
[8] | Oyama S T;Li W;Zhang W M .[J].Studies in Surface Science and Catalysis,1999,121:105. |
[9] | Radhakrishnan R;Oyama S T .[J].Journal of Catalysis,2001,199:282. |
[10] | 杨俊鹏,史文晶,施建伟,上官文峰.MnO2/ZSM-5上臭氧协同催化去除甲醛的性能研究[J].分子催化,2009(04):334-338. |
[11] | Wang H C;Liang H S;Chang M B .[J].Journal of Hazardous Materials B:Environmental Technologies,2011,186:1781. |
[12] | Wang, HC;Chang, SH;Hung, PC;Hwang, JF;Chang, MB .Catalytic oxidation of gaseous PCDD/Fs with ozone over iron oxide catalysts[J].Chemosphere,2008(2):388-397. |
[13] | Wang H C;Chang S H;Hung P C;Hwang J F Chang M B .[J].Journal of Hazardous Materials B:Environmental Technologies,2009,164:1452. |
[14] | Sekiguchi K;Sanada A;Sakamoto K .[J].Catalyst Communication,2003,4:247. |
[15] | Yu K P;Lee W M .[J].Applied Catalysis B:Environmental,2007,75:29. |
[16] | Kim S C .[J].Journal of Hazardous Materials B:Environmental Technologies,2002,91:285. |
[17] | Dhandapani B;Oyama S T .[J].Applied Catalysis B:Environmental,1997,11:129. |
[18] | 余全伟,赵明,刘志敏,张晓玉,郑灵敏,陈耀强,龚茂初.整体式锰基催化剂催化分解地表臭氧[J].催化学报,2009(01):1-3. |
[19] | 张竞杰,张彭义,张博,王军伟.活性炭负载金催化分解空气中低浓度臭氧[J].催化学报,2008(04):335-340. |
[20] | 张博,张彭义,史蕊,王化军.溶胶负载法制备的Au/AC催化分解低浓度臭氧[J].催化学报,2009(03):235-241. |
[21] | Reed C;Lee Y K;Oyama S T .[J].Journal of Physical Chemistry B,2006,110:4207. |
[22] | Chao C Y H;Kwong C W;Hui K S .[J].Journal of Hazardous Materials B:Environmental Technologies,2007,143:118. |
[23] | Kwong C W;Chao C Y H;Hui K S;Wan M P .[J].Atmospheric Environment,2008,42:2300. |
[24] | Kwong C W;Chao C Y H;Hui K S;Wan M P .[J].Environmental Science and Technology,2008,42:8504. |
[25] | Mehandjiev D;Cheshkova K;Naydenov A;Georgesku V .[J].Reaction Kinetics and Catalysis Letters,2002,76:287. |
[26] | Koningsberger D C .[J].Japanese Journal of Applied Physics,1993,32:877. |
[27] | Einaga H;Teraoka Y;Ogat A .[J].Catalysis Today,2010,10:067. |
[28] | Einaga H;Futamura S .Catalytic oxidation of benzene with ozone over alumina-supported manganese oxides[J].Journal of Catalysis,2004(2):304-312. |
[29] | 王美艳,朱天乐,樊星.低浓度苯系物在室温下的MnOx/Al2O3催化O3氧化[J].中国环境科学,2009(08):806-810. |
[30] | Einaga H;Futamura S .[J].Applied Catalysis B:Environmental,2005,60:49. |
[31] | Einaga H;Futanura S .[J].Catalyst Communication,2007,8:557. |
[32] | Li W.;Oyama ST.;Gibbs GV. .Mechanism of ozone decomposition on a manganese oxide catalyst. I. In situ Raman spectroscopy and ab initio molecular orbital calculations[J].Journal of the American Chemical Society,1998(35):9041-9046. |
[33] | Imamura S;Ikebata M;Ito T;Ogita T .[J].Industrial and Engineering Chemistry Research,1991,30:217. |
[34] | 陈树伟,闫晓亮,陈佳琪,马静红,李瑞丰.富氧条件下Mn/ZSM-5选择催化CH4还原NO[J].催化学报,2010(09):1107-1114. |
[35] | 胡燚,李慧,赵伟,吴巧巧,韩毓旺.不同合成方法对Fe2O3/γ-Al2O3表面性质及乙醇脱水性能的影响[J].现代化工,2010(08):39-42. |
[36] | 段洪敏,葛庆杰,张微,徐恒泳.乙醇浸渍对Co/SBA-15费托合成催化剂性能的影响[J].催化学报,2009(09):901-906. |
[37] | 邓存.助剂调变对CoO/γ-Al2O3催化性能的影响[J].分子催化,2008(05):449-453. |
[38] | 章青,王会芳,孙果宋,黄科林,方维平,杨意泉.活性炭材料对镍基催化剂乙醇气相羰化性能的影响[J].催化学报,2009(06):555-559. |
[39] | 徐铭遥;陈晓;夏启斌;李忠 .[J].功能材料,2010,41:1083. |
[40] | Radhakrishnan R;Oyama S T;Chen J G;Asakura K .[J].Journal of Physical Chemistry B,2001,10S:4245. |
[41] | Konova P;Stoyanova M;Naydenov A;Christoskova S;Mehandjiev D .Catalytic oxidation of VOCs and CO by ozone over alumina supported cobalt oxide[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2006(0):109-114. |
[42] | Maira A J;Coronado J M;Augugliaro V;Yeung K L Conesa J C Soria J .[J].Journal of Catalysis,2001,202:413. |
[43] | Besselmann S;L(o)ffier E;Muhler M .[J].Journal of Molecular Catalysis A:Chemical,2000,162:401. |
[44] | 中西香尔;P.H.索罗曼.红外光谱分析100例[M].北京:科学出版社,1984:30. |
[45] | Stuart B.Infrares Spectroscopy:Fundamentals and Applications[M].Wiltshire:Wiley & Sons,2004:77. |
[46] | Silverstein R M;Webster F X;Kiemle D J.Spectrometric Identification of Organic Compounds[M].Hoboken:Wiley & Sons,2005:87. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%