Journal Title
Title of Journal: Silicon
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Publisher
Springer Netherlands
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Authors: Jingqiang Wang Pengfei Xing Xinghong Du Xuetao Luo Yanxin Zhuang Tian Lyu Xue Dong
Publish Date: 2016/05/28
Volume: 9, Issue: 2, Pages: 265-272
Abstract
The kinetics of leaching silica sand in hydrochloric acid solution under conventional stirring and ultrasoundassisted conditions was studied Acid concentration temperature stirring speed ultrasound frequency and particle size had significant effects on the leaching rate while the influence of ultrasound power was negligible The leaching kinetics followed the shrinking core model with product layer diffusion control as the ratecontrolling step for the conventional stirring and ultrasoundassisted leaching process The apparent activation energies in the presence and absence of ultrasound irradiation was determined to be 436 and 675 kJ/mol respectively The presence of ultrasound not only increases the diffusion rate of mass but also promotes chemical reaction
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