Adsorptive Removal of Vapors of Toxic Sulfur Compounds using Activated Carbons
Adsorption of CS2 vapors has been studied on
different types of activated carbons obtained from different source
raw materials. The activated carbons have different surface areas and
are associated with varying amounts of the carbon-oxygen surface
groups. The adsorption of CS2 vapors is not directly related to surface
area, but is considerably influenced by the presence of carbonoxygen
surface groups. The adsorption decreases on increasing the
amount of carbon-oxygen surface groups on oxidation and increases
when these surface groups are eliminated on degassing. The
adsorption is maximum in case of the 950°-degassed carbon sample
which is almost completely free of any associated oxygen. The
kinetic data as analysed by Empirical diffusion model and Linear
driving force mass transfer model indicate that the adsorption does
not involve Fickian diffusion but may be considered as a pseudo first
order mass transfer process. The activation energy of adsorption and
isosteric enthalpies of adsorption indicate that the adsorption does not
involve interaction between CS2 and carbon-oxygen surface groups,
but hydrophobic interactions between CS2 and C-C atoms in the
carbon lattice.
[1] S. Tanada, K. Boki and K. Matsumoto, "Adsorption properties of methyl
sulfide and methyl disulfide on activated carbon, zeolite, and silicate,
and their porous structure" Chem. Pharm. Bull., Vol. 26, pp.1527-1532,
1978.
[2] S. Tanada and K. Boki, "Studies on the physicochemical properties of
activated carbon, zeolites and silicates for adsorption removal of
hydrogen sulfide, methyl mercaptan, dimethyl sulfide, trimethyl amine
and ammonia gases" Tokushima Bunri Daigaku Kenkyu Kiyo, Vol. 15,
pp 33-38, 1976.
[3] R.W. Glass and R.A. Ross, "Surface studies of the adsorption of sulfurcontaining
gases at 423 K on porous adsorbents .I. The adsorption of
hydrogen sulfide, methanethiol, ethanethiol and dimethylsulfide on silica
gels" The Journal of Physical Chemistry, Vol. 77, pp. 2571-2576 , 1973.
[4] S. Tsutsui and S. Tanada, "Adsorption of hydrogen sulfide, dimethyl
sulfide, and their binary mixtures into pores of nitrogen-containing
activated carbon", Chem. Pharm. Bull., Vol. 35, pp. 1238-1242, 1987
[5] R.W. Glass and R.A. Ross, "Surface studies of the adsorption of sulfurcontaining
gases at 423 K on porous adsorbents .I. The adsorption of
hydrogen sulfide, methanethiol, ethanethiol and dimethylsulfide on
alumina" Journal of Physical Chemistry, Vol. 77, pp. 2576-2578 , 1973
[6] H.L. Fan, C.H. Li and H.X. Guo, "A study on removal of organic sulfur
compound with modified activated carbon "Journal of Natural Gas
Chemistry, Vol. 8, pp. 151-156, 1999.
[7] H.L. Fan, G. J. Jin, J. Shangguan, H. X. Guo and Y.A. Li, " Study on
kinetic behaviour of adsorbing CS2 and CS2 + H2O by activated carbon
using thermogravimetric technique" Acta Scientiae Circumstantiae, Vol.
19, pp. 489-493, 1999.
[8] B. Guo, L. Chang and K. Xie "Study of the behavior of adsorbing CS2
by activated carbon" Fuel Processing Technology, Vol. 87, pp. 873-881,
2006.
[9] R.C. Bansal and M. Goyal, Activated Carbon Adsorption, Taylor &
Francis, CRC Group, New York, 2005.
[10] R.C. Bansal, J.B. Donnet and F. Stoeckli, Active Carbon, Marcel
Dekker, New York, 1988.
[11] J.B. Donnet, R.C. Bansal and F. Wang, Carbon Black, Marcel Dekker,
New York, 1993.
[12] R.C. Bansal, N. Bhatia and T.L. Dhami, "Surface characteristics and
surface behaviour of polymer carbons .III. Surface acidity of polymer
carbons", Carbon, Vol. 16, pp. 65-68, 1978.
[13] S.S. Barton, D. Gillespie and B.H. Harrison, "Surface studies of carbon.
Acidic oxides on spheron 6", Carbon, Vol. 11, pp. 649-654, 1973.
[14] B.R. Puri and R.C. Bansal, "Surface chemistry of carbon blacks. II.
Surface acidity in relation to chemisorbed oxygen", Carbon, Vol. 1, pp.
457-464, 1964.
[15] M. Goyal, V.K. Rattan, D. Aggarwal and R.C. Bansal, "Removal of
copper from aqueous solutions by adsorption on activated carbons",
Colloids Surf. A: Physicochemical and Engineering Aspects, Vol. 190,
pp. 229- 238, 2001.
[16] J. Crank, The Mathematics of Diffusion, 2nd ed., Clarendon Press,
Oxford, 1975
[17] N.J. Foley, K.M. Thomas, P.L. Forshaw, D. Stanton and P.R. Norman,
"Kinetics of water vapor adsorption on activated carbon", Langmuir,
Vol. 13, pp. 2083-2089, 1997.
[18] J. Yang, P. Juan, Z. Shen, R. Guo, J. Jia, H. Fang and Y. Wang,
"Removal of carbondisulfide from water via adsorption on activated
carbon fiber" Carbon , Vol. 44, pp. 1367-1375, 2006.
[1] S. Tanada, K. Boki and K. Matsumoto, "Adsorption properties of methyl
sulfide and methyl disulfide on activated carbon, zeolite, and silicate,
and their porous structure" Chem. Pharm. Bull., Vol. 26, pp.1527-1532,
1978.
[2] S. Tanada and K. Boki, "Studies on the physicochemical properties of
activated carbon, zeolites and silicates for adsorption removal of
hydrogen sulfide, methyl mercaptan, dimethyl sulfide, trimethyl amine
and ammonia gases" Tokushima Bunri Daigaku Kenkyu Kiyo, Vol. 15,
pp 33-38, 1976.
[3] R.W. Glass and R.A. Ross, "Surface studies of the adsorption of sulfurcontaining
gases at 423 K on porous adsorbents .I. The adsorption of
hydrogen sulfide, methanethiol, ethanethiol and dimethylsulfide on silica
gels" The Journal of Physical Chemistry, Vol. 77, pp. 2571-2576 , 1973.
[4] S. Tsutsui and S. Tanada, "Adsorption of hydrogen sulfide, dimethyl
sulfide, and their binary mixtures into pores of nitrogen-containing
activated carbon", Chem. Pharm. Bull., Vol. 35, pp. 1238-1242, 1987
[5] R.W. Glass and R.A. Ross, "Surface studies of the adsorption of sulfurcontaining
gases at 423 K on porous adsorbents .I. The adsorption of
hydrogen sulfide, methanethiol, ethanethiol and dimethylsulfide on
alumina" Journal of Physical Chemistry, Vol. 77, pp. 2576-2578 , 1973
[6] H.L. Fan, C.H. Li and H.X. Guo, "A study on removal of organic sulfur
compound with modified activated carbon "Journal of Natural Gas
Chemistry, Vol. 8, pp. 151-156, 1999.
[7] H.L. Fan, G. J. Jin, J. Shangguan, H. X. Guo and Y.A. Li, " Study on
kinetic behaviour of adsorbing CS2 and CS2 + H2O by activated carbon
using thermogravimetric technique" Acta Scientiae Circumstantiae, Vol.
19, pp. 489-493, 1999.
[8] B. Guo, L. Chang and K. Xie "Study of the behavior of adsorbing CS2
by activated carbon" Fuel Processing Technology, Vol. 87, pp. 873-881,
2006.
[9] R.C. Bansal and M. Goyal, Activated Carbon Adsorption, Taylor &
Francis, CRC Group, New York, 2005.
[10] R.C. Bansal, J.B. Donnet and F. Stoeckli, Active Carbon, Marcel
Dekker, New York, 1988.
[11] J.B. Donnet, R.C. Bansal and F. Wang, Carbon Black, Marcel Dekker,
New York, 1993.
[12] R.C. Bansal, N. Bhatia and T.L. Dhami, "Surface characteristics and
surface behaviour of polymer carbons .III. Surface acidity of polymer
carbons", Carbon, Vol. 16, pp. 65-68, 1978.
[13] S.S. Barton, D. Gillespie and B.H. Harrison, "Surface studies of carbon.
Acidic oxides on spheron 6", Carbon, Vol. 11, pp. 649-654, 1973.
[14] B.R. Puri and R.C. Bansal, "Surface chemistry of carbon blacks. II.
Surface acidity in relation to chemisorbed oxygen", Carbon, Vol. 1, pp.
457-464, 1964.
[15] M. Goyal, V.K. Rattan, D. Aggarwal and R.C. Bansal, "Removal of
copper from aqueous solutions by adsorption on activated carbons",
Colloids Surf. A: Physicochemical and Engineering Aspects, Vol. 190,
pp. 229- 238, 2001.
[16] J. Crank, The Mathematics of Diffusion, 2nd ed., Clarendon Press,
Oxford, 1975
[17] N.J. Foley, K.M. Thomas, P.L. Forshaw, D. Stanton and P.R. Norman,
"Kinetics of water vapor adsorption on activated carbon", Langmuir,
Vol. 13, pp. 2083-2089, 1997.
[18] J. Yang, P. Juan, Z. Shen, R. Guo, J. Jia, H. Fang and Y. Wang,
"Removal of carbondisulfide from water via adsorption on activated
carbon fiber" Carbon , Vol. 44, pp. 1367-1375, 2006.
@article{"International Journal of Chemical, Materials and Biomolecular Sciences:63996", author = "Meenakshi Goyal and Rashmi Dhawan", title = "Adsorptive Removal of Vapors of Toxic Sulfur Compounds using Activated Carbons", abstract = "Adsorption of CS2 vapors has been studied on
different types of activated carbons obtained from different source
raw materials. The activated carbons have different surface areas and
are associated with varying amounts of the carbon-oxygen surface
groups. The adsorption of CS2 vapors is not directly related to surface
area, but is considerably influenced by the presence of carbonoxygen
surface groups. The adsorption decreases on increasing the
amount of carbon-oxygen surface groups on oxidation and increases
when these surface groups are eliminated on degassing. The
adsorption is maximum in case of the 950°-degassed carbon sample
which is almost completely free of any associated oxygen. The
kinetic data as analysed by Empirical diffusion model and Linear
driving force mass transfer model indicate that the adsorption does
not involve Fickian diffusion but may be considered as a pseudo first
order mass transfer process. The activation energy of adsorption and
isosteric enthalpies of adsorption indicate that the adsorption does not
involve interaction between CS2 and carbon-oxygen surface groups,
but hydrophobic interactions between CS2 and C-C atoms in the
carbon lattice.", keywords = "Adsorption, surface groups, adsorption kinetics,
isosteric enthalpy of adsorption.", volume = "3", number = "3", pages = "191-6", }
