CO2 Sequestration by Direct Aqueous Mineral Carbonation under Low-Medium Pressure Conditions

被引:26
作者
Yan, Heng [1 ]
Zhang, Junying [1 ]
Zhao, Yongchun [1 ]
Liu, Rui [2 ]
Zheng, Chuguang [1 ]
机构
[1] Huazhong Univ Sci & Technol, State Key Lab Coal Combust, Wuhan 430074, Peoples R China
[2] Changchun Inst Technol, Changchun 130012, Peoples R China
关键词
CO2 Sequestration by Mineral Carbonation; Low-Medium Pressure; Wollastonite; Serpentine; Olivine; WOLLASTONITE CARBONATION; DIOXIDE SEQUESTRATION; DISPOSAL; DISSOLUTION; SERPENTINE; CAPTURE; AQUIFER;
D O I
10.1252/jcej.14we381
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
As CO2 is the largest contributor to the greenhouse effect, reducing the total CO2 emissions into the atmosphere has been considered as the breakthrough point of mitigating the greenhouse effect. Mineral carbonation is a potential route for CO2 sequestration. In this paper, the mineral carbonation reaction characteristics of wollastonite, serpentine and olivine under low-medium pressure conditions were investigated. Many tests including XRD, XRF, BET and thermal decomposition were applied. Parameters, such as reaction temperature, reaction pressure, particle size, solution composition and heat-treatment, were discussed in details. The results show that besides increase of reaction temperature and pressure, addition of NaHCO3 and decrease of particle size can also effectively accelerate the carbonation reaction for all the three minerals. Heat-treatment of minerals is only useful for serpentine. Highest carbonation conversion effciency of 83.5%, 47.7% and 16.9% was respectively achieved for wollastonite, serpentine and olivine under the condition of T = 150 degrees C, P = 40 bar and particle sizes <30 mu m. Compared the conversion effciencies, it is indicated that wollastonite was the most reactive mineral and olivine was suggested to be not suitable for CO2 sequestration by direct aqueous mineral carbonation under low-medium pressure conditions.
引用
收藏
页码:937 / 946
页数:10
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