Scholarlink

<p>In this study, surface modification of a general purpose activated carbon is achieved through impregnation of three common amino acids namely, glycine, serine and lysine for CO<sub>2</sub> adsorption in post-combustion processes at temperature range 298–358&#xa0;K. Glycine, due to its smaller molecular size, higher nitrogen content, and enhanced pore accessibility caused the adsorption to increase by 25% compared to original activated carbon uptake. N<sub>2</sub> adsorption isotherms were measured to comparatively evaluate adsorption preference and infer potential CO<sub>2</sub>/N<sub>2</sub> selectivity. The modified adsorbents with glycine exhibited similar N<sub>2</sub> uptake to initial activated carbon at 358&#xa0;K. All adsorbents exhibited physisorption behavior, with isosteric heat of adsorption values ranging from − 11 to − 33.9&#xa0;kJ/mol for CO<sub>2</sub> and − 15.6 to − 17.8&#xa0;kJ/mol for N<sub>2</sub>. Overall, the results demonstrate that functionalizing by glycine, significantly enhances CO<sub>2</sub> adsorption capacity of activated carbon. These findings provide valuable insights for designing tailored adsorbents for post combustion CO<sub>2</sub> capture.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Enhancement of CO2 capture in post combustion process using actived carbon modified by amino acids

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年3月30日

查看全文
  • Davoud Houshmand,
  • Fariborz Rashidi,
  • Sepideh Amjad-Iranagh,
  • Meysam Hajilari

摘要

In this study, surface modification of a general purpose activated carbon is achieved through impregnation of three common amino acids namely, glycine, serine and lysine for CO2 adsorption in post-combustion processes at temperature range 298–358 K. Glycine, due to its smaller molecular size, higher nitrogen content, and enhanced pore accessibility caused the adsorption to increase by 25% compared to original activated carbon uptake. N2 adsorption isotherms were measured to comparatively evaluate adsorption preference and infer potential CO2/N2 selectivity. The modified adsorbents with glycine exhibited similar N2 uptake to initial activated carbon at 358 K. All adsorbents exhibited physisorption behavior, with isosteric heat of adsorption values ranging from − 11 to − 33.9 kJ/mol for CO2 and − 15.6 to − 17.8 kJ/mol for N2. Overall, the results demonstrate that functionalizing by glycine, significantly enhances CO2 adsorption capacity of activated carbon. These findings provide valuable insights for designing tailored adsorbents for post combustion CO2 capture.