Dynamic adsorption on activated carbons of SO2 traces in air I.: Adsorption capacities

被引:33
作者
Martin, C
Perrard, A
Joly, JP
Gaillard, F
Delecroix, V
机构
[1] Univ Lyon 1, CNRS, UMR 5634, Lab Applicat Chim Environm, F-69622 Villeurbanne, France
[2] CNRS, UPR 5401, Inst Rech Catalyse, F-69626 Villeurbanne, France
[3] Messier Bugatti Div Carbone Ind, F-69627 Villeurbanne, France
关键词
activated carbon; adsorption;
D O I
10.1016/S0008-6223(02)00108-2
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Sulphur dioxide is an atmospheric Pollutant which, among numerous others, has to be eliminated by habitacle filters. Breakthrough curves of low concentration SO2 streams through beds of activated carbons have been obtained. Two carbons were studied, an activated PAN fiber (CF) and a granulated activated carbon (CN) under SO2, concentrations lower than 100 ppm. Carbon CN used 'as received' is able to trap SO2 in air at concentrations as low as 2.5 ppm. At this concentration, the adsorption of SO2 is essentially irreversible. The fraction of reversibly adsorbed SO2 rapidly increases when SO2, content in air increases from 2.5 to 100 ppm. As expected, the amounts of SO2 adsorbed per gram of carbon are much smaller than in the case of high SO2 contents in air ( > 1000 ppm). The presence of water in carbon micropores, enhances both reversible and irreversible adsorption of SO2. The reversibly adsorbed part is physisorbed while the irreversibly adsorbed part results in oxidation of SO2 at the carbon surface. This oxidation was evidenced by TPD from carbon samples after adsorption. The mechanism of SO2 adsorption is discussed in relation to the mechanisms proposed in literature for high SO2, contents (>1000 ppm). (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:2235 / 2246
页数:12
相关论文
共 28 条
  • [1] *AIR LIQ DIV SCI, 1976, ENC GAZ, P1121
  • [2] ADSORPTION OF SULFUR-DIOXIDE ON THERMALLY TREATED ACTIVE-CARBON
    DAVINI, P
    [J]. FUEL, 1989, 68 (02) : 145 - 148
  • [3] ADSORPTION AND DESORPTION OF SO2 ON ACTIVE-CARBON - THE EFFECT OF SURFACE BASIC GROUPS
    DAVINI, P
    [J]. CARBON, 1990, 28 (04) : 565 - 571
  • [4] Adsorption of SO2 on bituminous coal char and activated carbon fiber
    DeBarr, JA
    Lizzio, AA
    Daley, MA
    [J]. ENERGY & FUELS, 1997, 11 (02) : 267 - 271
  • [5] Derbyshire F, 2001, CHEM PHYS CARBON, V27, P1
  • [6] *DIN, 71460 DIN
  • [7] Jungten H., 1989, CHEM PHYS CARBON, V22, P145
  • [8] LEE JK, 1994, CHEM ENG SCI, V49, P4483
  • [9] Removal of SO2 over ethylene tar pitch and cellulose based activated carbon fibers
    Ling, L
    Li, K
    Liu, L
    Miyamoto, S
    Korai, Y
    Kawano, S
    Mochida, I
    [J]. CARBON, 1999, 37 (03) : 499 - 504
  • [10] Adsorption of sulfur dioxide by active carbon treated by nitric acid: II. Effect of preheating on the adsorption properties
    Lisovskii, A
    Shter, GE
    Semiat, R
    Aharoni, C
    [J]. CARBON, 1997, 35 (10-11) : 1645 - 1648