Industrial wastes derived solid adsorbents for CO2 capture: A mini review

Coal combustion in thermal power plants throughout the world produces large amounts of fly ash. Disposal of fly ash is a serious threat to the environment and hence is a worldwide concern for conversion of these wastes into useful products. Synthesis of mesoporous silica materials from coal fly ash has already been proposed as an option which can be utilized as an adsorbent. Adsorption is considered to be one of the more promising technologies for capturing CO2 from flue gases. This paper reviews the recent development of solid adsorbents from industrial waste materials with special reference to fly ash for post-combustion capture of CO2.

Graphical abstractAdsorbents derived from fly ash captures carbon dioxide (CO2) from flue gas of a thermal power plant.Figure optionsDownload full-size imageDownload high-quality image (168 K)Download as PowerPoint slideHighlights► Fly ash derived solid adsorbents appear to be a remedial solution for post-combustion capture of CO2. ► Synthesis of mesoporous silica materials from coal fly ash is proposed as an option which can be utilized as an adsorbent. ► The goal is to provide a realistic assessment for improved, lower-cost technologies for CO2 capture by utilization of fly ash which is posing environment hazards.