Effect of SO2 and NO on removal of VOC from simulated flue gas by activated carbon fibers at low temperature
-
摘要: 采用H2O2浸渍的方法对活性炭纤维(ACF)进行改性,并利用氮吸附等温线和XPS(X-ray photoelectron spectroscopy)的方法对ACF样品进行表征。通过实验测定改性前后ACF脱除VOC(甲苯作为VOC的代表物)的效果,同时考察二氧化硫(SO2)和一氧化氮(NO)对ACF脱除甲苯的影响。研究发现,双氧水浸渍改性对ACF的BET表面积和孔容没有影响,但使得ACF样品表面的含氧官能团含量大量增加。实验数据也表明,SO2和NO对VOC在ACF上的吸附具有抑制作用,且随着两者浓度的增加,抑制作用也增强。 研究还发现,SO2和NO同时存在比单一的SO2或NO对VOC在ACF上吸附的抑制作用更为明显。Abstract: Volatile organic compounds (VOC) seriously affect the environment and human health. The removal of pollutants from coal-fired power plants based on ACF adsorption is a promising method. In this paper, hydrogen peroxide (H2O2) was used to modify the ACF sample, and the methods of N2 adsorption isotherm and XPS (X-ray photoelectron spectroscopy) were utilized to characterize the ACF samples. The adsorption tests of VOC (toluene as a typical representative) based on ACF were conducted and the effect of SO2 and NO on the adsorption of toluene were investigated. It was found that H2O2 modification had no impact on the BET surface and pore volume of the ACF sample, but increased the oxygen groups on the ACF surface. The results also indicated that SO2 or NO inhibited the adsorption of VOC on ACF, and this inhibition became strong with increasing concentration of SO2 or NO. It is also found that the coexistence of SO2 and NO deteriorated the adsorption VOC on ACF more seriously than the single existence of SO2 or NO.
-
Key words:
- ACF /
- modification /
- VOC /
- XPS /
- surface groups
-
FERNÀNDEZ-MARTíNEZ G, LÓPEZ-MAHíA P, MUNIATEGUI-LORENZO S, PRADA-RODRíGUEZ D, FERNÀNDEZ-FERNÀNDEZ E. Distribution of volatile organic compounds during the combustion process in coal-fired power stations[J]. Atmos Environ, 2001, 35(33):5823-5831. 魏巍, 王书肖, 郝吉明. 中国人为源VOC排放清单不确定性研究[J]. 环境科学, 2010, 32(2):305-312. (WEI Wei, WANG Shu-xiao, HAO Ji-ming. Uncertainty analysis of emission inventory for volatile organic compounds from anthropogenic sources in China[J]. Environmental Science, 2010, 32(2):305-312.) 晏蓉, 康忠汉. 煤燃烧排放有机污染物的试验研究[J]. 华中理工大学学报, 1996, 24(1):4-7. (YAN Rong, KANG Hang-zhong. Research about the VOC from coal fired flue gas[J]. Journal of Huazhong Univ ers ity of Science and Technology. 1996, 24(1):4-7.) 区瑞锟, 陈砺, 严宗诚, 王红林. 低温等离子体-催化协同降解挥发性有机废气[J]. 环境科学与技术, 2011, 34(1):79-84. (OU Rui-kun, CHEN Li, YAN Zong-Cheng, WANG Hong-lin. Decomposition of volatile organic compounds by non-thermal plasma-catalyst hybrid technology[J]. Environmental Science & Technology (China), 2011, 34(1):79-84.) RUDDY E N, CARROLL L A. Select the best VOC control strategy[J]. Chem Eng Prog, 1993, 89(7):28-35. TAYLOR S H, HENEGHAN C S, HUTCHINGS G J, HUDSON I D. The activity and mechanism of uranium oxide catalysts for the oxidative destruction of volatile organic compounds[J]. Catal Today, 2000, 59(3/4):249-259. MORENO-CASTILLA C, RIVERA-UTRILLA J, LÓPEZ-RAMÓN M V, CARRASCO-MARíN F. Adsorption of some substituted phenols on activated carbons from a bituminous coal[J]. Carbon, 1995, 33(6):845-851. 刘振宇, 郑经堂. PAN基活性炭纤维研究及展望[J]. 化工进展, 1998, (1):18-21. (LIU Zhen-yu, ZHENG Jing-tang. Research and prospect about the PAN based activated carbon fiber[J]. Chemical Industry and Engineering Progress, 1998, (1):18-21.) 李全明, 邱发贵, 张梅, 张万喜. 聚丙烯腈基活性碳纤维毡的制备及性能研究(英文)[J]. 中山大学学报(自然科学版), 2007, 46(增刊):267-269. (LI Quan-ming, QU Fa-gu, ZHANG Mei, ZHANG Wan-xi. Study on prepara tion and property of PAN-based activated carbon fiber felt[J] 2007, 46(Suppl):s267-s269.) CHIANG Y-C, CHIANG P-C, HUANG C-P. Effects of pore structure and temperature on VOC adsorption on activated carbon[J]. Carbon, 2001, 39(4):523-534. LI S, TIAN S, FENG Y, LEI J, WANG P, XIONG Y. A comparative investigation on absorption performances of three expanded graphite-based complex materials for toluene[J]. J Hazard Mater, 2010, 183(1/3):506-511. BRUNAUER S, EMMETT P H, TELLER E. Adsorption of gases in multimolecular layers[J]. J Am Chem Soc, 1938, 60(2):309-319. LIPPENS B C, de BOER J H. Studies on pore systems in catalysts:V The t method[J]. J Catal, 1965, 4(3):319-323. MIKHAIL R S, BRUNAUER S, BODOR E E. Investigations of a complete pore structure analysis:I Analysis of micropores[J]. J Colloid Interface Sci, 1968, 26(1):45-53. 陆胜勇, 徐旭, 李晓东, 严建华, 池涌, 岑可法. 燃煤流化床锅炉PAHs排放的试验研究[J]. 环境科学学报, 2002, 22(1):123-125. (LU Sheng-yong, XU Xu, LI Xiao-dong, YAN Jian-hua, CHI Yong, CEN Ke-fa. Experimental study on PAHs emission of circculated fluidized bed boiler(CFBB)[J]. Acta Scientiae Circumstantiae, 2002, 22(1):123-125.) PUZIY A M, PODDUBNAYA O I, SOCHA R P, GURGUL J, WISNIEWSKI M. XPS and NMR studies of phosphoric acid activated carbons[J]. Carbon, 2008, 46(15):2113-2123. QU G-Z, LU N, LI J, WU Y, LI G-F, LI D. Simulataneous pentachlorophenol decomposition and granular activated carbon regeneration assisted by dielectric barrier discharge plasma[J]. J Hazard Mater, 2009, 172(1/3):472-478. 许绿丝. 改性处理活性炭纤维吸附氧化脱除SO2/NOx/Hg的研究. 武汉, 中国:华中科技大学, 2007. (XU Lv-si. Research about the adsorption and removal of SO2/NOx/Hg by modified activated carbon fiber. Wuhan:Huazhong University of Science and Technology, 2007.)
点击查看大图
计量
- 文章访问数: 1863
- HTML全文浏览量: 25
- PDF下载量: 900
- 被引次数: 0