Abstract
High-purity silica derived from rice husk, a low-cost and abundant agricultural byproduct, was utilized to synthesize NaY zeolite via hydrothermal. The resulting NaY zeolite, with a specific surface area of 666 m 2 /g, was modified with various amines to enhance direct air CO 2 capture performance. 30wt% MEA/NaY sorbent exhibited the highest CO 2 uptake, achieving approximately 14.5 mgCO 2 /g at 30 °C. Sorbent retained about 96 percent of its initial capacity after ten cycles. Kinetic analysis using Avrami’s model indicated a low activation energy of 9.01 kJ/mol. Also, cost analysis showed that 13 USD/kg is needed to produce NaY zeolite from rice husk.
Publication details
- Authors: Nokpho, P., Phianchana, K., Wang, X., Boonprasop, S., Piumsomboon, P., Chalermsinsuwan, B.
- Published in: (2025) Case Studies in Chemical and Environmental Engineering, 11, pp. 101235.
- Year: 2025
- DOI: 10.1016/j.cscee.2025.101235