Preparation and characterization of a porous silicate material using a CO2-storage material for CO2 adsorption
Preparation and characterization of a porous silicate material using a CO2-storage material for CO2 adsorption
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利用 CO2 储存材料吸附 CO2 的多孔硅酸盐材料的制备和表征
DOI：
10.1016/j.powtec.2018.04.022
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发表时间：
2018-06
期刊：
影响因子：
--
通讯作者：
Jianbin Zhang
中科院分区：
文献类型：
--
作者：
Xiaoyao Liu;Jianbin Zhang
以硅酸钠为硅源，CO2为酸源，以CO2为储气材料，成功制备了多孔硅材料。系统考察了CO2 SM投加量、粒径、后处理温度、后处理时间对CO2吸附性能的影响，并通过响应面实验确定了最佳条件：10 g CO2 SM用量，50 mL 0.5 M Na 2SiO 3，40-160目，后处理温度80 °C，后处理时间为36 h，在25 °C时，对8%CO2/N2的最大吸附容量为9.74 mg CO2/g吸附剂。以煤矸石中提取的SiO 32 −为硅源，在最佳条件下制备了25 °C时CO2/N2为8%时最大吸附容量为9.02 mg CO2/g吸附剂的PSM。然后，用乙二胺（EDA）浸渍PSM，CO2吸附容量提高到17.14 mgCO 2/g吸附剂。采用傅里叶变换红外光谱、X射线光电子能谱、热重分析、扫描电子显微镜、透射电子显微镜和N2吸附-脱附等温线等手段对优化的PSM进行了表征。虽然所得材料的吸附容量较低，但其硅源价格低廉，对煤矸石的合理利用具有重要意义。
A porous silicon material (PSM) was successfully prepared by using a CO2-storage material (CO2SM) as raw material, in which Na2SiO3was used as a silicon source and the CO2SM was used as an acid source. The effects of CO2SM dosage, particle size, post-treatment temperature, and post-treatment time on CO2adsorption capability was systemically evaluated, and the optimum condition was confirmed by response surface experiments as follows: 10 g CO2SM dosage, 50 mL 0.5 M Na2SiO3, 40–160 mesh, the post-treatment temperature of 80 °C, and the post-treatment time of 36 h with the maximum adsorption capacity of 9.74 mg CO2/g adsorbent for 8% CO2/N2at 25 °C. Based the optimum condition, SiO32−extraction from coal gangue was used as the silicon source to prepare the PSM with the maximum adsorption capacity of 9.02 mg CO2/g adsorbent for 8% CO2/N2at 25 °C. Next, PSM was impregnated with ethanediamine (EDA), after that the CO2adsorption capacity increased to 17.14 mg CO2/g adsorbent. In addition, the optimum PSM was characterized by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, thermogravimetric analysis, scanning electron microscopy, transmission electron microscopy, and N2adsorption-desorption isotherms. Although the resulting materials showed a low adsorption capacity, its silicon source was inexpensive, which was of significance in the rational utilization of coal gangue.
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