Wood-based carbon was studied as a hydrogen sulfide adsorbent in three adsorption/regeneration cy... more Wood-based carbon was studied as a hydrogen sulfide adsorbent in three adsorption/regeneration cycles. The regeneration was done using a constant amount of either hot or cold water. The performance of carbon and efficiency of its regeneration were evaluated on the basis of the amount of hydrogen sulfide adsorbed and on the selectivity of the carbon surface for oxidation of H 2 S to sulfur oxides. The latter, as the products of surface reactions, made the regeneration feasible.
A coconut shell-based activated carbon was studied as hydrogen sulfide adsorbent in four subseque... more A coconut shell-based activated carbon was studied as hydrogen sulfide adsorbent in four subsequent adsorption/regeneration cycles. The regeneration of exhausted carbon was done using washing with cold and hot water with a defined ratio of water volume to the unit weight of carbon. ...
Regeneration of unmodified activated carbons used in New York City sewage treatment plants was ca... more Regeneration of unmodified activated carbons used in New York City sewage treatment plants was carried out using cold water washing and thermal treatment at 300ЊC. The efficiency of the regeneration process was evaluated using adsorption of nitrogen, thermal analysis and dynamic measurement of hydrogen sulfide breakthrough capacity. Although differences in the behavior of samples from different locations exist, the results showed that thermal treatment is more efficient than cold water washing. The latter process was able to remove only a small percentage of sulfur species in the form of sulfuric acid, leaving the deposit of elemental sulfur intact. However, treatment at 300ЊC resulted in the removal of a significant amount of deposited sulfur species. The hydrogen sulfide adsorption capacity of regenerated samples was low due to the alterations in surface chemistry, which occurred during the treatment. The efficient regeneration of the carbon surface was not achieved due to the presence of significant amounts of volatile organic compounds adsorbed from effluent air. ᮊ
Wood-based carbon was studied as a hydrogen sulfide adsorbent in three adsorption/regeneration cy... more Wood-based carbon was studied as a hydrogen sulfide adsorbent in three adsorption/regeneration cycles. The regeneration was done using a constant amount of either hot or cold water. The performance of carbon and efficiency of its regeneration were evaluated on the basis of the amount of hydrogen sulfide adsorbed and on the selectivity of the carbon surface for oxidation of H 2 S to sulfur oxides. The latter, as the products of surface reactions, made the regeneration feasible.
A coconut shell-based activated carbon was studied as hydrogen sulfide adsorbent in four subseque... more A coconut shell-based activated carbon was studied as hydrogen sulfide adsorbent in four subsequent adsorption/regeneration cycles. The regeneration of exhausted carbon was done using washing with cold and hot water with a defined ratio of water volume to the unit weight of carbon. ...
Regeneration of unmodified activated carbons used in New York City sewage treatment plants was ca... more Regeneration of unmodified activated carbons used in New York City sewage treatment plants was carried out using cold water washing and thermal treatment at 300ЊC. The efficiency of the regeneration process was evaluated using adsorption of nitrogen, thermal analysis and dynamic measurement of hydrogen sulfide breakthrough capacity. Although differences in the behavior of samples from different locations exist, the results showed that thermal treatment is more efficient than cold water washing. The latter process was able to remove only a small percentage of sulfur species in the form of sulfuric acid, leaving the deposit of elemental sulfur intact. However, treatment at 300ЊC resulted in the removal of a significant amount of deposited sulfur species. The hydrogen sulfide adsorption capacity of regenerated samples was low due to the alterations in surface chemistry, which occurred during the treatment. The efficient regeneration of the carbon surface was not achieved due to the presence of significant amounts of volatile organic compounds adsorbed from effluent air. ᮊ
Uploads
Papers by Habibur Rahman