Preparation of Activated Carbon from Green Coconut Shell and its Characterization

Adsorption has appeared as one of the promising methods for CO2 capture and sequestration due to its low energy consumption, costeffectiveness, relatively simple technological process, non-corrosive to the equipments and it is applicable over a relatively wide range of temperatures and pressures. Development of new and highefficient solid adsorbents is crucial to enhance competitiveness of this process.

Zeolites or activated carbons are good adsorbents that are used for capturing CO2 from flue gas through physical adsorption, due to its porous structure. The extensive use of activated carbon is used now days, due to its large micro porosity, large specific surface area. The activated carbon is seems to be black in color and have large micro porosity. Activated carbon adsorption also used for treating low concentrations of wastewater streams at extremely low cost. The removal efficiency of Activated carbon is very high for harmful pollutants. As environmental pollution is the major problem now a day’s so need of activated carbon is growing day by day. Its texture characteristics and surface properties depend on the raw material and on the method used for its preparation.

For AC, the removal of moisture is not required and it is easy for regeneration and has a high CO2 adsorption capacity at ambient pressure and also its good adsorption properties. Activated carbons can be prepared by either a physical method or chemical method. It is produced from a large number of carbonaceous raw materials like coal, lignite, wood and some agricultural product like rice husk , nut shell, coconut shell, pea nut, sugarcane bagassage, tamarind wood, saw dust and industrial waste products.