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 (8): 102-108.doi: 10.19964/j.issn.1006-4990.2022-0594

• 研究与开发 • 上一篇    下一篇

碳化法制备多孔碳酸钙的工艺研究

陈燕萌(), 莫慧玲, 钟家美, 杨鹏飞, 蓝峻峰()   

  1. 广西科技师范学院食品与生化工程学院,广西 来宾 546199
  • 收稿日期:2022-10-08 出版日期:2023-08-10 发布日期:2023-08-25
  • 通讯作者: 蓝峻峰(1973— ),男,硕士,教授,主要研究方向为碳酸钙改性与应用研究;E-mail:272639515@qq.com
  • 作者简介:陈燕萌(1986— ),女,硕士,高级实验师,主要研究方向为碳酸钙改性与应用研究;E-mail:277153429@qq.com
  • 基金资助:
    广西无机材料绿色制备与应用重点实验室项目(桂科AD20297139);来宾市碳酸钙资源加工和应用重点实验室项目(来科能193203);来宾市科学研究与技术开发计划项目(来科能202408);广西科技师范学院青年科研创新团队—无机材料制备及清洁生产攻关小组项目(GXKS2020QNTD04)

Study on preparation process of porous calcium carbonate by carbonization

CHEN Yanmeng(), MO Huiling, ZHONG Jiamei, YANG Pengfei, LAN Junfeng()   

  1. College of Food & Biochemical Engineering,Guangxi Science & Technology Normal University,Laibin 546199,China
  • Received:2022-10-08 Published:2023-08-10 Online:2023-08-25

摘要:

以石灰石为原料,采用碳化法制备多孔碳酸钙。以多孔碳酸钙的比表面积作为评价指标,探究消化时间、消化温度、液固比、模板剂浓度、碳化温度、CO2流量等对多孔碳酸钙比表面积的影响,得出最佳的制备工艺条件。结果表明,以十二烷基硫酸钠(SDS)为模板剂,在最佳制备条件(消化时间为1 h、消化温度为60 ℃、液固比(体积质量比,g/mL)为14∶1、SDS浓度为0.1 mol/L、碳化温度为30 ℃、碳化CO2流量为400 mL/min)下制备的多孔碳酸钙比表面积可达60.17 m2/g。利用扫描电镜(SEM)、X射线衍射(XRD)等表征手段对所得多孔碳酸钙的颗粒形貌、晶型进行了分析,结果显示在最佳制备工艺条件下制备的多孔碳酸钙颗粒表面粗糙,孔道结构清晰可见,晶型为稳定的方解石型。

关键词: 碳化法, 多孔碳酸钙, 方解石型碳酸钙

Abstract:

Limestone was used as raw material to prepare porous calcium carbonate by carbonization.In order to obtain the best preparation process conditions,the effects of digestion time,digestion temperature,liquid-solid ratio,template concentration,carbonation temperature and carbonation CO2 flow on the specific surface area of porous calcium carbonate were investigated by taking the specific surface area of porous calcium carbonate as the evaluation index.The results showed that sodium dodecyl sulfate(SDS) was used as template,the optimum preparation conditions were as follows:digestion time was 1 h,digestion temperature was 60 ℃,liquid-solid ratio was 14∶1,SDS concentration was 0.1 mol/L,carbonization temperature was 30 ℃,and carbon dioxide flow rate was 400 mL/min.Under these conditions,the specific surface product of porous calcium carbonate could reach 60.17 m2/g.The particle morphology and crystal form of porous calcium carbonate were analyzed by scanning electron microscope(SEM) and X-ray diffraction(XRD).The results showed that the porous calcium carbonate particles prepared under the optimal preparation conditions had rough surface,clearly visible pore structure and stable calcite crystal form.

Key words: carbonization, porous calcium carbonate, calcite type calcium carbonate

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