多级孔协同胺功能化改性对酒糟基生物炭球吸附CO<sub>2</sub>的影响

周芮; 陈靖; 何璟琳; 王为浩; 苏慧; 王邦达; 靳紫恒; 江霞

doi:10.13205/j.hjgc.202605020

多级孔协同胺功能化改性对酒糟基生物炭球吸附CO₂的影响

doi: 10.13205/j.hjgc.202605020

周芮¹,
陈靖¹,
何璟琳¹,
王为浩²,
苏慧¹,
王邦达¹,
靳紫恒^1, ,,
江霞¹

1. 四川大学碳中和未来技术学院, 成都 610000;
2. 泸州老窖股份有限公司, 四川泸州 646000

基金项目:

国家自然科学基金青年项目（52200168）

详细信息

作者简介:
周芮(2002—),女,硕士研究生,主要研究方向为固废资源化利用。3079659832@qq.com

通讯作者:
靳紫恒(1993—),女,博士,副研究员,主要研究方向为生物质基材料的开发研究。zhjin712@scu.edu.cn

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出版历程
- 收稿日期: 2025-06-26
- 网络出版日期: 2026-06-06

Synergistic effect of hierarchical pores and amine functionalization on CO₂ adsorption performance by distillers' grains-derived biochar spheres

1. College for Carbon Neutrality Future Technology, Sichuan University, Chengdu 610000, China;
2. Luzhou Laojiao Co., Ltd., Luzhou 646000, China

摘要

摘要: 针对工业领域二氧化碳（CO₂）排放占比高的问题，可通过酒糟废弃物制备生物炭，用于吸附工业烟气中的CO₂，从而实现碳减排目标。生物炭因其多孔结构可以作为捕集CO₂的固态吸附剂，但尚存孔道吸附力较弱，难以在高温下实现烟气中CO₂选择性捕集的缺点。为解决上述问题，以酒糟热解生物炭为原料，通过灰分自模板-颗粒自组装对生物炭进行造孔并同步胺负载，制备了胺功能化多级孔炭球。研究结果表明：生物炭球中胺负载量显著增加，提供了更多的CO₂吸附位点，且保留了部分的大孔结构（胺负载后总孔容保持在0.0030~0.0066 cm³/g），有助于提高形貌稳定性和CO₂传质速率。特别地，添加炭粉量最少的胺功能化多级孔炭球（0.2PW-K-CNF-PEI）在100 ℃下表现出对CO₂较优的吸附性能（1.03 mmol/g），较高的CO₂扩散系数（0.0495 min^-¹），且在80 ℃下实现了对CO₂较优的选择性吸附效果（44 mg/g）。该研究为酒糟副产物资源化及低温烟气CO₂捕集提供了解决方案。
- 酒糟炭 /
- 自组装技术 /
- 胺功能化 /
- CO₂吸附
Abstract: To address the issue of high carbon dioxide （CO₂） emission proportion in the industrial sector， distiller's grain waste can be used to prepare biochar， which is then used to adsorb CO₂ from industrial flue gas， thereby achieving the goal of carbon emission reduction. Owing to its porous structure， biochar can serve as a solid adsorbent for CO₂ capture； however， it still has drawbacks， such as weak pore adsorption capacity and difficulties in achieving selective capture of CO₂ from flue gas at high temperatures. To solve the aforementioned problems， in this study， distiller's grain pyrolysis biochar was used as the raw material， and pore-forming of biochar and simultaneous amine loading were carried out through ash self-templating and particle self-assembly methods， resulting in the preparation of amine-functionalized hierarchical porous carbon spheres. The results showed that the amine loading amount in the biochar spheres increased significantly， providing more CO₂ adsorption sites， and part of the macroporous structure was retained （the total pore volume after amine loading remained between 0.0030 cm³/g and 0.0066 cm³/g）， which was conducive to improving the morphological stability and CO₂ mass transfer rate. In particular， the 0.2PW-K-CNF-PEI carbon sphere exhibited excellent CO₂ adsorption capacity （1.03 mmol/g） at 100 ℃， a high CO₂ diffusion coefficient （0.0495 min^-1）， and superior selective CO₂ adsorption capacity （44 mg/g） at 80 ℃. This study provides a solution for the resource utilization of distiller's grain by-products and CO₂ capture from low-temperature flue gas.
- distillers' grains-derived biochar /
- self-assembly technology /
- amine functionalization /
- CO₂ adsorption

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