Frontiers of Chemical Science and Engineering
>> 2019,
Volume 13,
Issue 4
doi:
10.1007/s11705-019-1871-7
RESEARCH ARTICLE
A combination process of mineral carbonation with SO2 disposal for simulated flue gas by magnesia-added seawater
. School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China.. Hebei Collaborative Innovation Center of Modern Marine Chemical Technology, Tianjin 300130, China.. Quanzhou Normal University, Fujian 362000, China.. Shandong Haihua Group Co., Ltd., Shandong 262737, China
Accepted: 2019-11-08
Available online: 2019-11-08
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Abstract
The desulfurization by seawater and mineral carbonation have been paid more and more attention. In this study, the feasibility of magnesia and seawater for the integrated disposal of SO and CO in the simulated flue gas was investigated. The process was conducted by adding MgO in seawater to reinforce the absorption of SO and facilitate the mineralization of CO by calcium ions. The influences of various factors, including digestion time of magnesia, reaction temperature, and salinity were also investigated. The results show that the reaction temperature can effectively improve the carbonation reaction. After combing SO removal process with mineral carbonation, Ca removal rate has a certain degree of decrease. The best carbonation condition is to use 1.5 times artificial seawater (the concentrations of reagents are 1.5 times of seawater) at 80°C and without digestion of magnesia. The desulfurization rate is close to 100% under any condition investigated, indicating that the seawater has a sufficient desulfurization capacity with adding magnesia. This work has demonstrated that a combination of the absorption of SO with the absorption and mineralization of CO is feasible.
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