无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2023, Vol. 55 ›› Issue (9): 57-65.doi: 10.19964/j.issn.1006-4990.2022-0652

• 研究与开发 • 上一篇    下一篇

钙硅酸盐矿物湿法碳酸化封存二氧化碳实验研究

常承兵1,2(), 刘生玉1,2,3(), 张雷1, 杨志超1,2, 郭建英1,2, 栗褒1,2   

  1. 1.太原理工大学矿业工程学院, 山西 太原 030024
    2.山西浙大新材料与化工研究院, 山西 太原 030032
    3.太原理工大学原位改性采矿教育部重点实验室, 山西 太原 030024
  • 收稿日期:2022-11-03 出版日期:2023-09-10 发布日期:2023-09-19
  • 通讯作者: 刘生玉(1969— ),男,教授,博士生导师,工学博士,主要从事界面分选理论及应用、低值与废弃资源加工与利用方面的研究; E-mail:liusytyut@126.com
  • 作者简介:常承兵(1996— ),男,硕士研究生在读,主要研究方向为矿物封存二氧化碳;E-mail:1447624095@qq.com
  • 基金资助:
    山西浙大新材料与化工研究院研发项目(2022SX-TD009);山西省基础研究计划项目(202203021211165)

Experimental study on carbon dioxide sequestration by wet carbonation of calcium silicate minerals

CHANG Chengbing1,2(), LIU Shengyu1,2,3(), ZHANG Lei1, YANG Zhichao1,2, GUO Jianying1,2, LI Bao1,2   

  1. 1.College of Mining Engineering,Taiyuan University of Technology,Taiyuan 030024,China
    2.Shanxi -Zheda Institute of Advanced Materials and Chemical Engineering,Taiyuan 030032,China
    3.Key Laboratory of In situ Property-improving Mining of Ministry of Education,Taiyuan University of Technology,Taiyuan 030024 China
  • Received:2022-11-03 Published:2023-09-10 Online:2023-09-19

摘要:

钙硅酸盐矿物湿法碳酸化封存CO2是具有发展前景的固碳技术。为了比较不同种类的含钙硅酸盐矿物固碳效果的差异,研究了温度、压力、液固比(mL/g)、粒度及矿物添加剂(NaHCO3和NaCl)对硅灰石和钙长石湿法碳酸化封存CO2效果的影响。结果表明,硅灰石和钙长石的碳酸化产物分别是方解石和文石,热重实验结果显示,方解石的热稳定性强于文石。各实验条件下硅灰石碳酸化转化率均高于钙长石,两种矿物碳酸化转化率随压力增大、粒度减小、NaHCO3和NaCl的加入而增大;获得了硅灰石和钙长石的最大碳酸化转化率分别为83.62%、16.20%,二者差异显著。在温度为120~210 ℃两种矿物溶解吉布斯自由能(ΔGr )的计算表明,硅灰石溶解过程的吉布斯自由能始终小于钙长石溶解吉布斯自由能,说明硅灰石溶解速率和溶解反应自发进行的程度都大于钙长石,这是影响钙硅酸盐矿物碳酸化反应活性的关键因素。

关键词: 硅灰石, 钙长石, 湿法碳酸化, 封存CO2, 固碳技术

Abstract:

Wet carbonation of calcium silicate minerals for CO2 sequestration is a promising carbonsequestration technology.To compare the carbon sequestration effects of different calcium silicate minerals,the effects of temperature,pressure,liquid-solid ratio(mL/g),particle size and mineral additives(NaHCO3 and NaCl) on CO2 sequestration by wet carbonation of wollastonite and anorthite were investigated.The results showed that the carbonation products of wollastonite and anorthite were calcite and aragonite,respectively,and the results of the thermogravimetric experiment indicated that the thermostability of calcite was higher than that of aragonite.The carbonation conversion of wollastonite was higher than that of anorthite under all test conditions,and the carbonation conversion of the two minerals was increased with increasing pressure,decreasing particle size,and the addition of NaHCO3 and NaCl.The maximum carbonation conversions of 83.62% and 16.20% were obtained for wollastonite and anorthite,respectively,with significant differences.The results of Gibbs free energy of dissolution(ΔGr ) showed that,in the range of 120~210 ℃,the ΔGr of wollastonite was always lower than that of anorthite,indicating that the rate of dissolution and the spontaneously occurring extent of dissolution reaction of wollastonite were both greater than that of anorthite.It was a key factor affecting the activity of the carbonation reaction for calcium silicate minerals.

Key words: wollastonite, anorthite, wet carbonation, sequestered CO2, carbon sequestration technology

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