Microporous activated carbons prepared from palm shell by thermal activation and their application to sulfur dioxide adsorption.

Textural characterization of activated carbons prepared from palm shell by thermal activation with carbon dioxide (CO(2)) gas is reported in this paper. Palm shell (endocarp) is an abundant agricultural solid waste from palm-oil processing mills in many tropical countries such as Malaysia, Indonesia, and Thailand. The effects of activation temperature on the textural properties of the palm-shell activated carbons, namely specific surface area (BET method), porosity, and microporosity, were investigated. The activated carbons prepared from palm shell possessed well-developed porosity, predominantly microporosity, leading to potential applications in gas-phase adsorption for air pollution control. Static and dynamic adsorption tests for sulfur dioxide (SO(2)), a common gaseous pollutant, were carried out in a thermogravimetric analyzer and a packed column configuration respectively. The effects of adsorption temperature, adsorbate inlet concentration, and adsorbate superficial velocity on the adsorptive performance of the prepared activated carbons were studied. The palm-shell activated carbon was found to have substantial capability for the adsorption of SO(2), comparable to those of some commercial products and an adsorbent derived from another biomass.

[1]  K. Sing.  Reporting physisorption data for gas/solid systems with special reference to the determination of surface area and porosity (Recommendations 1984) , 1985 .

[2]  R. T. Yang,et al.  Gas Separation by Adsorption Processes , 1987 .

[3]  A. Youssef,et al.  Coal-Based Activated Carbons for the Removal of Sulphur Dioxide via Adsorption , 1997 .

[4]  H. Jüntgen.  New applications for carbonaceous adsorbents , 1977 .

[5]  Masaaki Yoshikawa,et al.  Removal of SOx and NOx over activated carbon fibers , 2000 .

[6]  J. J. Rodríguez,et al.  Preparation and characterization of activated carbons from eucalyptus kraft lignin , 1993 .

[7]  T. Bose,et al.  New dielectric method for the measurement of physical adsorption of gases at high pressure , 1987 .

[8]  M. Douglas LeVan,et al.  Fundamentals of Adsorption , 1996 .

[9]  H. Yücel,et al.  Characterization of activated carbon produced from almond shell and hazelnut shell , 1994 .

[10]  A. Lua,et al.  Preparation and characterization of chars from oil palm waste , 1998 .

[11]  A. P. Mathews,et al.  Effects of Particle Stratification on Fixed Bed Absorber Performance , 1999 .

[12]  Odd Busmundrud,et al.  Vapour breakthrough in activated carbon beds , 1993 .

[13]  Desorption processes: Supercritical fluid regeneration of activated carbon , 1989 .

[14]  E. Teller,et al.  ADSORPTION OF GASES IN MULTIMOLECULAR LAYERS , 1938 .

[15]  G. Madras,et al.  Supercritical carbon dioxide extraction of organics from soil , 1993 .

[16]  K. Gergova,et al.  Effects of activation method on the pore structure of activated carbons from apricot stones , 1996 .

[17]  V. Gómez-Serrano,et al.  Characterization study of char and activated carbon prepared from raw and extracted rockrose , 1993 .

[18]  Y. Ogino,et al.  Physical adsorption of gases at high pressure: V. An Extension of a Generalized Adsorption Equation to Systems with Polar Adsorbents , 1981 .

[19]  A. Pandolfo,et al.  Activated carbons prepared from shells of different coconut varieties , 1994 .

[20]  M. Molina-Sabio,et al.  Adsorption of CO2 and SO2 on activated carbons with a wide range of micropore size distribution , 1995 .

[21]  J. F. Stampfer,et al.  Adsorption rate coefficients for gases and vapors on activated carbons , 1993 .

[22]  E. Vansant,et al.  Carbon molecular sieves produced from walnut shell , 1995 .

[23]  T. Otowa,et al.  Removal of single component chlorinated hydrocarbon vapor by activated carbon of very high surface area , 1999 .

[24]  M. Izquierdo,et al.  Influence of low-rank coal char properties on their SO2 removal capacity from flue gases: I. Non-activated chars , 1997 .