Preparation of activated carbon from fly ash and its application for CO2 capture

다국어 초록 (Multilingual Abstract)

Power and desalination plants are one of the main anthropogenic sources for CO2 generation, which is oneof the key elements to cause greenhouse gas effect and thus contribute to the global warming. Fly ash (FA) generated indesalination and power plants was converted into activated carbon (AC) treated with KOH at higher temperature andtested for CO2 capturing efficiency. Morphological characteristics of FA such as BET specific surface area (SSA), porevolume, pore diameter, and pore size distribution (PSD) were performed using N2 adsorption isotherm. CO2 adsorptioncapacity and adsorption isotherms of CO2 over AC were measured by performing thermogravimetric analysis atdifferent temperatures. BET SSA of 161m2g−1 and adsorption capacity of 26mg CO2/g AC can be obtained by activationat KOH/FA ratio of 5 at 700 oC and activation time of 2 h. Therefore, great potential exists for producing AC fromFA, which will have the positive effect of reducing the landfill problem and global warming.

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