Desulfurization Performance and Kinetics of Potassium Hydroxide-Impregnated Char Sorbents for SO2 Removal from Simulated Flue Gas

• DOI: 10.1021/acsomega.0c02624
• Publication Date: 2020-07-20T14:27:15Z
• Authors: Jinxiao Dou; Yongqi Zhao; Xiaoxu Duan; Hongning Chai; Lichun Li; Jianglong Yu
• Keywords: Potassium hydroxide; Energy-dispersive X-ray spectroscopy

Potassium hydroxide-impregnated char sorbents (KOH/char) prepared via an ultrasonic-assisted method were used for SO2 removal from flue gas. The desulfurization experiment was analyzed using a fixed-bed reactor under 40-150 °C temperature range, simulated X-ray diffraction (XRD), Fourier-transform infrared spectroscopy, and scanning electron microscopy/energy-dispersive spectroscopy (SEM/EDS) to analyze both the chemical physical characteristics of sorbents. results exposed that complete elimination gas achieved when char/KOH sorbent with mass ratio KOH 11:1. It noted had substantial influence on performance sulfur capacity maximized at 100 °C. Experimental also revealed small amount O2 present in solvent could improve efficiency sorbent. XRD patterns showed K2SO4 main product, which consistent SEM/EDS analysis. experimental well-described Lagergren first-order adsorption kinetics model activation energy (Ea) by KOH/char 20.25 kJ/mol.