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Mn-TiO2催化剂烟气脱汞性能及反应机理

DOI: 10.13334/j.0258-8013.pcsee.2015.13.016, PP. 3331-3337

Keywords: 锰掺杂,二氧化钛,脱汞,催化氧化,烟气

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Abstract:

采用溶胶凝胶法制备了二氧化钛和掺杂锰离子的二氧化钛(Mn(x)-TiO2),利用BET比表面积测试仪,X射线衍射仪和X射线光电子能谱仪对催化剂进行表征分析。在模拟烟气条件下,利用制备的Mn(x)-TiO2在自制固定床反应器中进行了催化氧化脱除Hg0的实验研究。同时,也得到了烟气组分对催化剂脱汞性能的影响规律。结果表明,Mn的掺杂能提高催化剂的比表面积以及改善催化剂的孔隙结构;Mn的掺杂抑制TiO2晶粒的生长;Mn在催化剂表面主要存在形式为MnO2。结果表明,催化剂的脱汞性能随着Mn掺杂量的增加而提高;O2和NO对催化剂脱汞表现为促进作用,SO2和H2O对催化剂脱汞有抑制作用。在N2/SO2气氛下,SO2具有明显的抑制作用;而O2和NO能削弱SO2的抑制作用。提出了Mn(x)-TiO2催化氧化单质汞的反应机理。

References

[1]  袁媛,张军营,樊国祥,等.静电纺丝法制备TiO 2 -WO 3 纳米纤维及光催化脱汞的研究[J].中国电机工程学报,2012,32(32):44-49.Yuan Yuan,Zhang Junying,Fan Guoxiang,et al.Electrospum TiO 2 -WO 3 Nanofibers for Photocatalytic Removal of Mercury[J].Proceedings of the CSEE,2012,32(32):44-49(in Chinese).
[2]  Burtraw D,Palmer K,Paul A,et al.Secular trends,environmental regulations,and electricity markets[J].The Electricity Journal,2012,25(6):35-47.
[3]  Wang Q C,Shen W G,Ma Z G.Estimation of mercury emission from coal combustion in China[J].Environmental Science & Technology,2000,34(13):2711-2713.
[4]  Wang Y J,Duan Y F,Yang L G,et al.Experimental study on mercury transformation and removal in coal-fired boiler flue gases[J].Fuel Processing Technology,2009,90(5):643-651.
[5]  Li Y,Murphy P D,Wu C Y,et al.Development of silica/vanadia/titania catalysts for removal of elemental mercury from coal-combustion flue gas[J].Environmental Science & Technology,2008,42(14):5304-5309.
[6]  Wang J,Yang J,Liu Z.Gas-phase elemental mercury capture by a V 2 O 5 /AC catalyst[J].Fuel Processing Technology,2010,91(6):676-680.
[7]  Ji L,Sreekanth P M,Smirniotis P G,et al.Manganese oxide/titania materials for removal of NO x and elemental mercury from flue gas[J].Energy & Fuels,2008,22(4):2299-2306.
[8]  Qiao S,Chen J,Li J F,et al.Adsorption and catalytic oxidation of gaseous elemental mercury in flue gas over MnO x /alumina[J].Industrial & Engineering Chemistry Research,2009,48(7):3317-3322.
[9]  Xie J K,Yan N Q,Yang S J,et al.Synthesis and characterization of nano-sized Mn-TiO 2 catalysts and their application to removal of gaseous elemental mercury[J].Research on Chemical Intermediates,2012,38(9):2511-2522.
[10]  任建莉,陈俊杰,罗誉娅,等.活性炭纤维脱除烟气中气态汞的试验研究[J].中国电机工程学报,2010,30(5):28-34.Ren Jianli,Chen Junjie,Luo Yuya,et al.Characteristics of the mercury vapor removal from flue gas by activated carbon fibers[J].Proceedings of the CSEE,2010,30(5):28-34(in Chinese).
[11]  洪亚光,段钰锋,朱纯,等.载溴高硫石油焦活性炭脱汞实验研究[J].中国电机工程学报,2014,34(11):1762-1768.Hong Yaguang,Duan Yufeng,Zhu Chun,et al.Experimental Study on Mercury Removal of High-Sulfur Petroleum Coke Activated Carbon Impregnated With Bromine[J].Proceedings of the CSEE,2014,34(11):1762-1768(in Chinese).
[12]  Spurr R A,Myers H.Quantitative Analysis of Anatase-Rutile Mixtures with an X-ray Diffractometer [J].Analytical Chemistry,1957,29(5):760-762.
[13]  黄华伟,罗津晶.飞灰各组分对汞形态转化的影响[J].中国电机工程学报,2010,30( S):70-75.Huang Huawei,Luo Jinjing.Effect of Various Fly Ash Compositions on Mercury Speciation Transformation[J].Proceedings of the CSEE,2010,30(S):70-75(in Chinese).
[14]  王钧伟,刘瑞卿.活性焦负载 MnO 2 对气态Hg 0 的吸附脱除研究[J].环境科学学报,2012,32(9):2261-2266.Wang Junwei,Liu Ruiqing.2012.Hg 0 removal by an activated coke-supported MnO 2 catalyst[J].Acta Scientiae Circumstantiae,2012,32(9):2261-2266(in Chinese).
[15]  袁媛,张军营,李小龙,等.TiO 2 -V 2 O 5 纳米纤维光催化氧化烟气中的Hg 0 [J].化工学报,2012,63(S2):69-75.Yuan Yuan,Zhang Junying,Li Xiaolong,et al.Photocatalytic oxidation of Hg 0 in flue gas using TiO 2 -V 2 O 5 nanofibers[J].CIESC Journal,2012,63(S2):69-75(in Chinese).
[16]  Li S C,Jacobson P,Zhao S L,et al.Trapping Nitric Oxide by Surface Hydroxyls on Rutile TiO 2 (110)[J].The Journal of Physical Chemistry C,2012,116(2):1887-1891.
[17]  Wen X Y,LI C T,Fan X P,et al.Experimental study of gaseous elemental mercury removal with CeO 2 /γ-Al 2 O 3 [J].Energy & Fuels,2011,25(7):2939-2944.
[18]  张海茹,刘浩,王萌,等.复杂烟气条件下太西活性焦脱除Hg 0 的实验研究[J].燃料化学学报,2012,40(10):1269-1275.Zhang Hairu,Liu Hao,Wang Meng,et al.Experimental study on mercury removal by Taixi activated coke under complex atmosphere of flue gases[J].Journal of Fuel Chemistry and Technology,2012,40(10):1269-1275(in Chinese).
[19]  孔凡海,邱建荣,刘豪,等.NO/SO 2 对纳米氧化铁脱除单质汞性能的影响[J].中国电机工程学报,2010,30(35):43-48.Kong Fanhai,Qiu Jianrong,Liu Hao,et al.Effect of NO/SO 2 on elemental mercury adsorption by nano-Fe 2 O 3 [J].Proceedings of the CSEE,2010,30(35):43-48(in Chinese).
[20]  Li Hailong,Wu ChangYu,Li Ying,et al.Role of flue gas components in mercury oxidation over TiO 2 supported MnO x -CeO 2 mixed-oxide at low temperature[J].Journal of Hazardous Materials,2012(243):117-123.
[21]  赵波,刘小伟,斯俊平,等.富氧燃烧模拟烟气中SO 2 和H 2 O对活性炭吸附汞的影响[J].中国电机工程学报,2013,33(17):24-29.Zhao Bo,Liu Xiaowei,Si Junping,et al.Impact of SO 2 and H 2 O on mercury removal by activated carbon in simulated flue gas of oxy-coal combustion[J].Proceedings of the CSEE,2013,33(17):24-29(in Chinese).
[22]  Liu Hao,Zhang Hairu,Yang Hongmin.Photocatalytic removal of nitric oxide by multi-walled carbon nanotubes- supported TiO 2 [J].Chinese Journal of Catalysis,2014,35(1):66-77.
[23]  Henderson Michael A.An HREELS and TPD study of water on TiO 2 (110):the extent of molecular versus dissociative adsorption[J].Surface Science,1996,355(1):151-166.

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