Characterization of porous alkali-activated fly ash composite as a solid absorbent. (June 2019)

• Record Type: Journal Article
• Authors: Chindaprasirt, Prinya; Rattanasak, Ubolluk
• Is Part Of: International journal of greenhouse gas control. Volume 85(2019)
• Page Start: 30
• Page End: 35
• Publication Date: 2019-06
• Subjects: Porous alkali-activated fly ash -- High-calcium fly ash -- CO2 capture -- Absorbent; Greenhouse gases -- Environmental aspects -- Periodicals; Air -- Purification -- Technological innovations -- Periodicals; Gaz à effet de serre -- Périodiques; Gaz à effet de serre -- Réduction -- Périodiques; Air -- Purification -- Technological innovations; Greenhouse gases -- Environmental aspects; Periodicals; 363.73874605
• DOI: 10.1016/j.ijggc.2019.03.011
• Languages: English
• ISSNs: 1750-5836

Abstract

Highlights: Waste fly ash from coal power plant was utilized as porous material. Porous alkali-activated fly ashes were synthesized for CO2 capture application. Production process was simple and cost effectiveness. Zinc stearate/H2 O2 and Al powder were used to produce the pore in materials. Abstract: This research proposed the synthesis of porous alkali-activated fly ash (AA-fly ash) composites with a simple method for CO2 capture application. Two types of foaming agents, viz., zinc stearate/H2 O2 and Al powder, were used to produce pores in the materials. Results revealed that porous AA-fly ash composite with a density of 1 g/cm 3 could be fabricated. Using Al powder, the method obtained a porous AA-fly ash paste with surface area of 36 m 2 /g, values which were higher than those of zinc stearate/H2 O2 . The AA-fly ash composite was crushed and applied as the CO2 gas absorbent. The absorption rate was 0.12 g CO2 per gram of porous AA-fly ash composite, suggesting that the porous AA-fly ash composite can be used as a solid absorbent. In addition, the production process is simple and cost effective.