电石渣制备球霰石型CaCO3的影响因素研究

摘要/Abstract

摘要： 为了高附加值利用电石渣以及封存CO₂,以电石渣为原料,使用多种添加剂,常压制备了球状球霰石。利用粉末X射线衍射仪、扫描电子显微镜、傅里叶变换红外光谱仪等考察了添加剂种类、反应温度、电石渣中杂质、反应体系对合成CaCO₃中球霰石的影响。结果表明,甘氨酸和丝氨酸对诱导生成球霰石的效果显著,反应温度的增加不利于球霰石的生成,电石渣中的杂质Al₂O₃和SiO₂可以诱导Ca(OH)₂矿化CO₂体系形成方解石。不同反应体系会影响所制备球霰石的晶体大小,电石渣-CO₂体系制备的晶体尺寸最小。在15 ℃的电石渣-CO₂反应体系中,通过添加甘氨酸可以制备单分散的表面有粗糙突起的球霰石型CaCO₃。以上研究结果为利用电石渣等碱性工业废渣制备高附加值球霰石,同时安全有效封存大量CO₂温室气体提供了一种简便方法。

关键词: 电石渣, 球霰石, 甘氨酸, 丝氨酸, 二氧化碳

Abstract: For high value-added utilization of carbide slag and sequestration of CO₂, spherical vaterite was prepared at atmospheric pressure using carbide slag as raw material and various additives. The effects of additive types, reaction temperature, impurities in carbide slag and reaction system on vaterite in calcium carbonate synthesis were investigated by X-ray diffraction, scanning electron microscope and fourier transform infrared spectroscopy. The results show that glycine and serine have significant effect on the formation of vaterite. The increase of reaction temperature is not conducive to the formation of vaterite. The impurities Al₂O₃ and SiO₂ in carbide slag induce Ca(OH)₂ mineralization CO₂ system to form calcite. Different reaction systems affect the crystal size of prepared vaterite, and the crystal size prepared by carbide slag-CO₂ system is the smallest. In the carbide slag-CO₂ reaction system at 15 ℃, monodisperse vaterite type CaCO₃ with rough protrusions on the surface can be prepared by adding glycine. The above results provide a simple method for preparing high value-added vaterite from alkaline industrial wastes such as carbide slag, and safely and effectively storing a large amount of CO₂ greenhouse gases.

Key words: carbide slag, vaterite, glycine, serine, carbon dioxide

中图分类号:

TQ172.4⁺4

李昱蓓, 刘松辉, 朱建平, 管学茂. 电石渣制备球霰石型CaCO₃的影响因素研究[J]. 硅酸盐通报, 2023, 42(8): 2799-2807.

LI Yubei, LIU Songhui, ZHU Jianping, GUAN Xuemao. Influencing Factors of Preparation of Vaterite Type CaCO₃by Carbide Slag[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(8): 2799-2807.

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电石渣制备球霰石型CaCO₃的影响因素研究

Influencing Factors of Preparation of Vaterite Type CaCO₃by Carbide Slag

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