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Preparation and kinetic study of organic amine‐loaded ion‐exchange resin as CO 2 adsorbents
Author(s) -
Liu Xinmin,
Qiu Xuexia,
Sun Xin,
Mei Libin,
Wang Lingyun,
Guo Qingjie
Publication year - 2020
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.13476
Subject(s) - adsorption , diffusion , amine gas treating , desorption , chemistry , ion exchange , ion exchange resin , dispersion (optics) , particle (ecology) , chemical engineering , chromatography , ion , inorganic chemistry , organic chemistry , thermodynamics , physics , oceanography , engineering , optics , geology
Organic amine adsorbents prepared by template method using ion exchange resin (D001) as support and polyethyleneimine (PEI) as a modifier, and the preparation process was optimized by orthogonal experiment plan. The results showed that adsorbents prepared under conditions (the copper ion concentration was 0.2 mol/L, the ultrasonic time was 3 hr, and the PEI loadings were 30%) had an excellent CO 2 adsorption properties. The effects of temperature and gas influent velocity on CO 2 adsorption properties were investigated in a fixed bed reactor. When PEI loadings were 30%, the adsorption temperature was 65°C and the gas influent velocity was 40 ml/min, organic amine adsorbents performed a better PEI dispersion, stability, and CO 2 adsorption capacity. Maximum CO 2 adsorption capacity was 4.00 mmol/g. Besides, the CO 2 adsorption capacity decreased by only 10% after 10 cycles of adsorption–desorption tests, attribute to a small amount of PEI was volatilize during the regeneration process. The external diffusion was eliminated by increasing the gas influent velocity, and the adsorption data were well fitted the Weber‐Morris particle diffusion model, indicating that CO 2 adsorption was controlled by internal diffusion.