Dissolution Rate of Paper White Mud at Constant pH

Jian Li Zhao; Zhao Yan Fan; Ying Jie Li; Kui Hua Han; Chun Mei Lu

doi:10.4028/www.scientific.net/AMR.356-360.1371

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 356-360Dissolution Rate of Paper White Mud at Constant pH

Dissolution Rate of Paper White Mud at Constant pH

Abstract:

The dissolution of paper white mud(PWM) has been studied by pH-stat method in various parameters such as the pH values(4.3, 5.4, 6.0, 7.5), sorbent particle sizes (0-0.097mm, 0.097-0.105mm, 0.105-0.3mm), and the reaction temperature (30°C, 40°C, 50°C) in order to investigate the feasibility of using PWM as wet flue gas desulphurization sorbent. The results show that: the lower the pH value is, the higher the dissolution rate; particle size is the direct function of dissolution rate, the smaller the size is, the higher the dissolution rate, the optimal particle size in this work is 0-0.097mm; and reaction temperature has slightly influence on PWM dissolution. Kinetic analysis of the results show that the PWM dissolution is controlled by fluid film diffusion according to shrinking core model and the activation energy is 11.9±0.7 kJmol-1.