以商业化副产物聚偏二氯乙烯(PVDC)树脂粉末为碳源制备炭材料并研究了298 K时CO2的吸附性能.研究结果表明,PVDC树脂直接碳化得到比表面积为1220 m2·g-1且孔径小于1.5 nm的纯微孔炭材料,CO2在1 bar下的吸附量高达3.97 mmol·g-1.在此基础上用KOH对微孔炭材料进行活化处理,发现KOH活化在增大炭材料比表面积的同时能保持高微孔率,但1 bar下的CO2吸附量适度降低.高压下CO2吸附量与炭材料的比表面积呈正比,20 bar时在比表面积为2150 m2·g-1样品上的吸附量为18.27 mmol·g-1,这与其他类型高比表面积吸附剂相比都处于较高水平.
Porous carbons were prepared from the waste commercial byproduct of poly (vinylidene chloride) resin powders,and the corresponding CO2 adsorption properties at 298 K were studied.The results indicated that carbons with surface areas of 1220 m2· g-1 were obtained through direct carbonization and all pores were less than 1.5 nm,showing high CO2 uptake of 3.97 mmol·g-1 at 1 bar.KOH activation was applied to adjust pore structure and this process greatly enhanced the surface area and retained high porosity in the resulting carbons.However,CO2 uptake at 1 bar was slightly lowered in activated carbons compared with pristine one and uptake at high pressure was proportional to surface area.The carbon with surface area of 2150 m2· g-1 has CO2 uptake up to 18.27 mmol·g-1 at 20 bar,larger than many other related porous adsorbents.
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