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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

作者： Wang, Junting 1 ; Wang, Yingyi 1 ; Liu, Xiaohan 1 ; Xiao, Qiang 2 ; Demir, Muslum 3 ; Almesfer, Mohammed K. 5 ; Colak, Suleyman Gokhan 6 ; Wang, Linlin 7 ; Hu, Xin 1 ; Liu, Ya 1 ;

作者机构： 1.Zhejiang Normal Univ, Key Lab, Minist Educ Adv Catalysis Mat, Jinhua 321004, Peoples R China

2.Beijing Acad Agr & Forestry Sci, Inst Plant Nutr Resources & Environm, Beijing 100097, Peoples R China

3.Bogazici Univ, Dept Chem Engn, TR-34342 Istanbul, Turkiye

4.TUBITAK Marmara Res Ctr, Mat Inst, TR-41470 Gebze, Turkiye

5.King Khalid Univ, Coll Engn, Chem Engn Dept, KSA & Cent Labs, Abha 61413, Saudi Arabia

6.Iskenderun Tech Univ, Fac Engn & Nat Sci, Dept Biomed Engn, TR-31200 Hatay, Turkiye

7.Zhejiang Normal Univ, Coll Engn, Key Lab Urban Rail Transit Intelligent Operat & Ma, Jinhua 321004, Peoples R China

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.

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