Open AccessMineral CO2 Sequestration by Carbonation of Glauberite
Author(s) -
Kuanwei Rong,
Aixiang Wu,
Shenghua Yin,
Hongyan Li
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/300/3/032092
Subject(s) - carbonation , carbon sequestration , dissolution , ammonia , environmental science , materials science , waste management , chemistry , carbon dioxide , chemical engineering , engineering , composite material , organic chemistry
CO 2 mineral sequestration has significant advantages such as safety and permanence, but its industrial application is limited by high costs. Combining CO 2 mineral sequestration with existing industrial processes can make it economically viable by integrating ore extraction, crushing and grinding, and avoiding the construction of new carbonation plant. In this paper, CO 2 mineral sequestration was combined with the leaching of sodium sulfate from glauberite. The dissolution behavior and carbonation process of glauberite ore were studied in detail. The influences of key parameters such as ammonia dosage, CO 2 pressure and temperature were also investigated. The results showed that under the optimal conditions (ammonia dosage 110%, CO 2 pressure 5 bar, temperature 100°C), the carbonation rate of glauberite can reach 93.4%, while the concentrations of sodium ion and sulfate ion were 25.8g/L and 53.8g/L, respectively. The increase of ammonia dosage and CO 2 pressure contributed to the dissolution and carbonation of glauberite. Temperature, however, affected them in two very different ways.