DOI: 10.1016/j.jcou.2019.01.009
Scopus记录号: 2-s2.0-85061032129
论文题名: Dissolution of heat activated serpentine for CO2 sequestration: The effect of silica precipitation at different temperature and pH values
作者: Farhang F. ; Oliver T.K. ; Rayson M.S. ; Brent G.F. ; Molloy T.S. ; Stockenhuber M. ; Kennedy E.M.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2019
卷: 30 起始页码: 123
结束页码: 129
语种: 英语
英文关键词: Dissolution rate
; Heat activated serpentine
; Mineral carbonation
; Serpentine dissolution kinetics
; Silica precipitation
Scopus关键词: Carbon dioxide
; Carbonation
; Kaolinite
; Metal ions
; pH effects
; Serpentine
; Silica
; Silicate minerals
; Temperature
; Dissolution kinetics
; Dissolution rates
; Effect of temperature
; Magnesium silicate minerals
; Mineral carbonation
; Silica precipitation
; Solid phase formation
; Thermodynamic modelling
; Dissolution
英文摘要: The dissolution of magnesium silicate minerals such as serpentine in aqueous solutions saturated or near saturated with carbon dioxide (CO2) enables its subsequent reaction to form magnesium carbonate, a process called aqueous mineral carbonation. The dissolution rate of magnesium ions (Mg2+) from thermally activated serpentine and the factors influencing the rate and extent of dissolution have been studied in our research group. The current contribution focuses on the effect of temperature and pH on the dissolution of heat activated lizardite (a polymorph of serpentine). The extent of dissolution of thermally activated lizardite was measured experimentally as a function of temperature (25 °C ≤ T ≤ 75 °C) and pH (1.2 ≤ pH ≤ 9.8). It was found that at higher temperatures the level of Mg extraction is greater during the initial stage of dissolution but is then hindered by the re-precipitation of amorphous silica. Thermodynamic modelling was used to assess the susceptibility of solid phase formation and confirmed the likelihood of re-precipitation of amorphous silica from the solutions. For the first time, in this work, the crackling core model (CCM) was used to model experimental data at different pH values. © 2019 Elsevier Ltd. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117296
Appears in Collections: 气候变化与战略
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Recommended Citation:
Farhang F.,Oliver T.K.,Rayson M.S.,et al. Dissolution of heat activated serpentine for CO2 sequestration: The effect of silica precipitation at different temperature and pH values[J]. Journal of CO2 Utilization,2019-01-01,30