采用共沉淀法制备了CeO2, Co3O4和一系列Co3O4/CeO2复合氧化物催化剂,在400°C下含SO2的氧化气氛中对催化剂进行了硫中毒处理,通过原位红外光谱、X射线衍射、程序升温脱附和X射线光电子能谱对新鲜和硫中毒的样品进行了表征.结果表明,所有测试的硫中毒样品上均形成了硫酸盐, CeO2上累积的硫酸盐明显比Co3O4上的多, Co3O4/CeO2复合氧化物在硫中毒过程中形成了硫酸钴和硫酸铈.对新鲜和硫化样品在NO/O2气氛下进行了催化炭黑燃烧实验,发现Co3O4/CeO2复合氧化物的活性和抗硫性能优于CeO2,但抗硫性能低于Co3O4.
CeO2, Co3O4, and a series of Co3O4/CeO2 composite oxides prepared by co-precipitation were ex-posed to SO2 under an oxidizing environment at 400 °C. These fresh and SO2-poisoned samples were characterized by in situ diffuse reflectance infrared Fourier transform spectroscopy, X-ray diffraction, temperature-programmed desorption, and X-ray photoelectron spectroscopy. Sulfates were formed on the oxides, with more sulfates on CeO2 than on Co3O4. On the Co3O4/CeO2 composite oxides, both cobalt sulphate and ceria sulfate were formed. Fresh and sulfated samples were tested for soot combustion in a NO/O2 gas flow. The Co3O4/CeO2 composite oxides showed better SO2 tol-erance and higher activity than CeO2 but were more easily poisoned by SO2 than Co3O4.
参考文献
| [1] | Neeft J P A, Makkee M, Moulijn J A. Appl Catal B, 1996, 8:57,1996. |
| [2] | Liu J, Zhao Z, Xu C M. Chin J Catal(刘坚, 赵震, 徐春明. 催化学报), 2004, 25:673,2004. |
| [3] | van Setten B A A L, Makkee M, Moulijn J A. Catal Rev-Sci Eng, 2001, 43:489,2001. |
| [4] | Setiabudi A, Chen J L, Mul G, Makkee M, Moulijn J A. Appl Catal B, 2004, 51:9,2004. |
| [5] | Weng D, Li J, Wu X D, Lin F. Catal Commun, 2008, 9:1898,2008. |
| [6] | Harrison P G, Ball I K, Daniell W, Lukinskas P, Céspedes M, Miró E E, Ulla M A. Chem Eng J, 2003, 95:47,2003. |
| [7] | Dhakad M, Mitshuhashi T, Rayalu S, Doggali P, Bakardjiva S, Subrt J, Fino D, Haneda H, Labhsetwar N. Catal Today, 2008, 132:188,2008. |
| [8] | Liu J, Zhao Z, Wang J Q, Xu C M, Duan A J, Jiang G Y, Yang Q. Appl Catal B, 2008, 84:185,2008. |
| [9] | Sheng Y Q, Zhou Y, Lu H F, Zhang Z K, Chen Y F. Chin J Catal(盛叶琴, 周瑛, 卢晗锋, 张泽凯, 陈银飞. 催化学报), 2013, 34:567,2013. |
| [10] | Bueno-López A. Appl Catal B, 2014, 146:1,2014. |
| [11] | Shan W J, Yang L H, Ma N, Yang J L. Chin J Catal(单文娟, 杨利花,马娜, 杨佳丽. 催化学报), 2012, 33:970,2012. |
| [12] | Aneggi E, Divins N J, de Leitenburg C, Llorca J, Trovarelli A. J Catal, 2014, 312:191,2014. |
| [13] | Liotta L F, Di Carlo G, Pantaleo G, Venezia A M, Deganello G. Appl Catal B, 2006, 66:217,2006. |
| [14] | Kang M, Song M W, Lee C H. Appl Catal B, 2003, 251:143,2003. |
| [15] | van Setten B A A L, Schouten J M, Makkee M, Moulijn J A. Appl Catal B, 2000, 28:253,2000. |
| [16] | Teraoka Y, Nakano K, Kagawa S, Shangguan W F. Appl Catal B, 1995, 5:L181,1995. |
| [17] | Fino D, Russo N, Saracco G, Specchia V. J Catal, 2003, 217:367,2003. |
| [18] | Luo T, Vohs J M, Gorte R J. J Catal, 2002, 210:397,2002. |
| [19] | Smirnov M Yu, Kalinkin A V, Pashis A V, Sorokin A M, Noskov A S, Kharas K C, Bukhtiyarov V I. J Phys Chem B, 2005, 109:11712,2005. |
| [20] | Teterin Yu A, Teterin A Yu, Lebedev A M, Utkin I O. J Electron Spec Related Pheno, 1998, 88-91:275,1998. |
| [21] | Liotta L F, Carlo G, Pantaleo G, Venezia A M, Deganello G. Top Catal, 2009, 52:1989,2009. |
| [22] | Goodman A L, P Li Usher C R, Grassian V H. J Phys Chem A, 2001, 105:6109,2001. |
| [23] | Luo T, Gorte R J. Appl Catal B, 2004, 53:77,2004. |
| [24] | Waqif M, Bazin P, Saur O, Lavalley J C, Blanchard G, Touret O. Appl Catal B, 1997, 11:193,1997. |
| [25] | Mul G, Kapteijn F, Doornkamp C, Moulijn J A. J Catal, 1998, 179:258,1998. |
| [26] | Peralta M A, Milt V G, Cornaglia L M, Querini C A. J Catal, 2006, 242:118,2006. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%