Production of low temperature carbonization with H2SO4 adsorbed in aqueous solution and CO2 captured

• Main Authors: Ji-Shian Chen, 陳季賢
• Other Authors: Min-Yun Jang
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/96136917876746535973

碩士 === 國立聯合大學 === 化學工程學系碩士班 === 98 === Chars prepared from rice husk, sugarcane leaves and tea by H2SO4 carbonization method. The obtained chars had specific surface areas 8.36 to 46.03 m2/g. Oxide functional group of carbons according to temperature programmed desorption (TPD). The adsorption kinetics and equilibrium isotherms of methylene blue (MB) and malachite green (MG) from water at 30℃ on the chars were studied. Four simplified models including the Elovich equation, intraparticle diffusion model, pseudo-first-order equation and pseudo-second-order equation were used to test the adsorption kinetics, the adsorption of this work were best fitted by pseudo-second-order equation. Rice husk, sugarcane leaves and tea the maximum monolayer sorption capacity obtained from the Langmuir model was 303, 357 and 333 mg/g for MB dyes, respectively; 384, 345 and 333 mg/g for MG dyes, respectively. CO2 capture capacities were found to be 2.47, 2.63 and 2.44 mmol/g at rice husk, sugarcane leaves and tea, respectively. It is practicable of chars prepared from agricultural waste by H2SO4 carbonization method to removed dyes.