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  • 标题:HIGH ADSORPTION CAPACITIES OF C〇2 OR CH4 ON POROUS CARBON MATERIALS WITH THE ULTRAMICROPORES
  • 本地全文:下载
  • 作者:Yongjie Wei ; Junchao Wang ; Chen Gu
  • 期刊名称:Fresenius Environmental Bulletin
  • 印刷版ISSN:1018-4619
  • 出版年度:2020
  • 卷号:29
  • 期号:8
  • 页码:6617-6625
  • 语种:English
  • 出版社:PSP Publishing
  • 摘要:In this work, five porous carbon materials (PC- 1, PC-2, PC-3, PC-4, PC-5) were prepared by using resorcinol-formaldehyde resin as a precursor and KOH as a chemical activator. The effects of temperature, time, and alkali-carbon ratio on activation were investigated. The optimum activation conditions were at a temperature of650 °C ,a time of 2 h, and an alkali to carbon ratio of 2:1. Under such conditions, the adsorption capacities of CO2 and CH4 reached 7.13 mmol/g and 3.54 mmol/g respectively, measured with the ASAP-2020 automatic physical adsorption instrument at 273.15 K and 1 bar. The structural information of porous carbon materials was obtained by N 2 adsorption and CO2 adsorption. The results measured by N 2 adsorption demonstrate that porous carbon materials w ith large specific surface area and large total pore volume measured are not the best adsorbents for CO2 and CH4 under atmospheric pressure. The results of CO2 adsorption analysis at 0 °C show that the ultramicropores less than 1 nm play a decisive role in the adsorption performance. The adsorption performance of CO2 and CH4 in the low pressure region is mainly determined by the ultramicropores. As the pressure increases, the pores w ith larger pore diameters play an increasing role.
  • 关键词:Porous carbon materials;adsorption performance;pore structure
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