The Synthesis of B-Doped Porous Carbons via a Sodium Metaborate Tetrahydrate Activating Agent: A Novel Approach for CO2 Adsorption

文献类型： 外文期刊

第一作者： Wang, Junting

作者： Wang, Junting;Wang, Yingyi;Liu, Xiaohan;Hu, Xin;Liu, Ya;Xiao, Qiang;Demir, Muslum;Demir, Muslum;Almesfer, Mohammed K.;Colak, Suleyman Gokhan;Wang, Linlin

作者机构：

关键词： B-doped porous carbons; CO2 adsorption; biomass; sodium metaborate tetrahydrate

期刊名称：MOLECULES （ 影响因子：4.6； 五年影响因子：5.0 ）

ISSN：

年卷期： 2025 年 30 卷 12 期

页码：

收录情况： SCI

摘要： The CO2 capture from flue gas using biomass-derived porous carbons presents an environmentally friendly and sustainable strategy for mitigating carbon emissions. However, the conventional fabrication of porous carbons often relies on highly corrosive activating agents like KOH and ZnCl2, posing environmental and safety concerns. To address this challenge, in the present work sodium metaborate tetrahydrate (NaBO24H(2)O) has been utilized as an alternative, eco-friendly activating agent for the first time. Moreover, a water chestnut shell (WCS) is used as a sustainable precursor for boron-doped porous carbons with varied microporosity and boron concentration. It was found out that pyrolysis temperature significantly determines the textural features, elemental composition, and CO2 adsorption capacity. With a narrow micropore volume of 0.27 cm(3)/g and a boron concentration of 0.79 at.% the representative adsorbent presents the maximum CO2 adsorption (2.51 mmol/g at 25 degrees C, 1 bar) and a CO2/N-2 selectivity of 18 in a 10:90 (v/v) ratio. Last but not least, the as-prepared B-doped carbon adsorbent possesses a remarkable cyclic stability over five cycles, fast kinetics (95% equilibrium in 6.5 min), a modest isosteric heat of adsorption (22-39 kJ/mol), and a dynamic capacity of 0.80 mmol/g under simulated flue gas conditions. This study serves as a valuable reference for the fabrication of B-doped carbons using an environmentally benign activating agent for CO2 adsorption application.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序