全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
环境化学  2015 

钙钛矿型催化剂La0.8M0.2CoO3(M=Sr,Ce,Ba,Ca)催化燃烧VOCs的活性与抗硫性研究

Keywords: VOCs,钙钛矿复合氧化物,催化燃烧,抗硫性

Full-Text   Cite this paper   Add to My Lib

Abstract:

用柠檬酸溶胶-凝胶法制备了La0.8M0.2CoO3(M=Sr,Ce,Ba,Ca)4种钙钛矿型复合氧化物催化剂.甲苯催化燃烧活性测试表明,4种催化剂均具有很好的催化活性,转化率达到90%时反应温度都在340℃以下,比LaCoO3下降20℃-70℃,催化性能依次为La0.8Sr0.2CoO3>La0.8Ce0.2CoO3>La0.8Ca0.2CoO3>La0.8Ba0.2CoO3.抗SO2性能测试结果表明,4种催化剂都具有一定的抗硫性能,ΔT50%在60℃以内,大小依次为La0.8Ce0.2CoO3>La0.8Sr0.2CoO3>La0.8Ba0.2CoO3>La0.8Ca0.2CoO3.通过XRD、XPS和SEM等表征可知经含硫气体作用后中毒的催化剂钙钛矿结构有所破坏,表面均不同程度地生成了金属硫酸盐、硫化物等新物质,在催化剂表面形成屏蔽效应致使催化剂失活.

References

[1]  Misono M. Recent progress in the practical applications of heteropolyacid and perovskite catalysts: Catalytic technology for the sustainable society [J]. Catalysis Today,2009,144(3/4) :285-291
[2]  牛建荣.La1-xSrxMO3±δ(M=Co,Mn)纳米粒子制备及其对乙酸乙酯和甲苯氧化反应的催化性能究.北京:北京工业大学硕士学位论文,2006
[3]  崔梅生,李明来,张顺利,等.钙钛矿催化材料La1-xCexCoO3+δ的制备、表征及甲烷燃烧催化性质[J].中国有色金属学报,2004,14(9):1580-1584
[4]  Li W B, Wang J X, Gong H. Catalytic combustion of VOCs on non-noble metal catalysts[J].Catalysis Today, 2009,148(1/2):81-87
[5]  Yamazoe N, Teraoka Y. Oxidation catalysis of perovskites-relationships to bulk structure and composition[J].Catalysis Today, 1990,8(2):175-199
[6]  Ciambellia P, Ciminob S, De Rossc S, et al. AFeO3(A=La,Nd,Sm) and LaFe1-xMgxO3 perovskites as methane combustion and CO oxidation catalysts:structural, redox and catalytic properties[J]. Applied Catalysis B: Environmental , 2001,29(4):239-250
[7]  Baiker A, Marti P E,Keusch P, et al.Influence of the A-site cation in ACoO3(A=La,Pr,Nd,and Gd) perovskite-type oxides on catalytic activity for methane combustion[J]. Journal of Catalysis,1994,146(1):268-276
[8]  Mathieu-Deremince V, Nagy J B, Verbist J J. Structure and catalytic activity of mixed oxides of perovskite structure [J]. Studies in Surface Science and Catalysis, 1995, 96:393-404
[9]  谢云龙, 李小年, 王作仁, 等. 堇青石负载La-Mn-O复合氧化物催化剂的甲苯催化燃烧性能[J].中国稀土学报,2006,24:19-23
[10]  Rousseau S, Loridant S, Delichere P, et al. La(1-x)SrxCo(1-y)FeyO3 perovskites prepared by sol-gel method: Characterization and relationships with catalytic properties for total oxidation of toluene[J]. Applied Catalysis B: Environmental, 2009, 88(3/4):438-447
[11]  Zhu Yongfa , Tana Ruiqin,Feng Jie, et al. The reaction and poisoning mechanism of SO2 and perovskite LaCoO3 film model catalysts[J]. Applied Catalysis A:General,2001,209(1/2):71-77
[12]  沈柳青.钙钛矿型催化剂催化燃烧VOCs的活性、抗毒性和稳定性研究.浙江:浙江工业大学硕士学位论文,2008
[13]  Wang H, Zhu Y F, Tan R Q, et al. Study on the poisoning mechanism of sulfur dioxide for perovskite La0.9Sr0.1CoO3 model catalysts[J]. Catalysis Letters,2002,82:199-204
[14]  BULGANG,梁淑惠,滕飞,等.Ce掺杂对La1-xCexCoO3催化剂的结构和催化氧化性能的影响[J].物理化学学报,2008,24(2):205-210
[15]  Auer R, Alifanti M, Delmon B, et al.Catalytic combustion of methane in the presence of organic and inorganic compounds over La0.9Ce0.1CoO3 catalyst[J]. Applied Catalysis B: Environmental , 2002,39(4):311-318
[16]  Alifanti M, Auer A, Kirchnerova J, et al. Activity in methane combustion and sensitivity to sulfur poisoning of La1-xCexMn1-yCoyO3 perovskite oxides[J]. Applied Catalysis B: Environmental,2003,41(1/2):71-81

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133