碳化法制备多孔碳酸钙的工艺研究

doi:10.19964/j.issn.1006-4990.2022-0594

Abstract

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

CLC Number:

TQ127.1

CHEN Yanmeng, MO Huiling, ZHONG Jiamei, YANG Pengfei, LAN Junfeng. Study on preparation process of porous calcium carbonate by carbonization[J]. Inorganic Chemicals Industry, 2023, 55(8): 102-108.

Figures/Tables 14

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Study on preparation process of porous calcium carbonate by carbonization

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