纤维素模板改性钙基CO<sub>2</sub>吸附剂的蒸汽水合活化

吴岩; 荣鼐; 韩龙; 刘开伟; 王久衡; 穆正勇; 王珊珊; 石秀良

doi:10.13205/j.hjgc.202405021

纤维素模板改性钙基CO₂吸附剂的蒸汽水合活化

doi: 10.13205/j.hjgc.202405021

吴岩¹,
荣鼐^1,2, ,,
韩龙³,
刘开伟⁴,
王久衡¹,
穆正勇¹,
王珊珊¹,
石秀良¹

1. 安徽建筑大学环境与能源工程学院, 合肥 230601;
2. 安徽省建设领域碳达峰碳中和战略研究院, 合肥 230601;
3. 浙江工业大学机械工程学院能源与动力工程研究所, 杭州 310014;
4. 安徽建筑大学安徽省先进建筑材料工程实验室, 合肥 230601

基金项目:

国家自然科学基金项目(51706002,51976195,52078002)

安徽省高校优秀科研创新团队(2022AH010018)

安徽省高校优秀青年科研项目(2022AH030034)

详细信息

作者简介:
吴岩(1999-),男,硕士研究生。wuyan@stu.ahjzu.edu.cn

通讯作者:
荣鼐(1988-),男,副教授,主要研究方向为钙循环CO₂捕集。rongnai@ahjzu.edu.cn

计量
- 文章访问数: 28
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- 被引次数: 0
出版历程
- 收稿日期: 2023-04-13
- 网络出版日期: 2024-07-11

STEAM HYDRATION ACTIVATION OF CELLULOSE TEMPLATE MODIFIED Ca-BASED CO₂ SORBENT

1. School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230601, China;
2. Anhui Institute of Strategic Study in Carbon Emissions Peak and Carbon Neutrality in Urban-rural Development, Hefei 230601, China;
3. Institute of Energy and Power Engineering, College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China;
4. Anhui Province Engineering Laboratory of Advanced Building Materials, Anhui Jianzhu University, Hefei 230601, China

摘要

摘要: 采用挤出-滚圆法制备了改性钙基吸附剂颗粒,基于双固定床反应系统测试了吸附剂CO₂循环捕集性能。添加质量分数5%的水泥和10%纤维素模板的吸附剂20个循环后,CO₂吸附量最高为0.19 g/g。为再生其CO₂捕获性能,采用不同蒸汽体积分数和温度对改性钙基吸附剂进行煅烧后单独水合活化。结果表明:体积分数30%蒸汽、300 ℃为最佳活化再生工况,20个循环后改性吸附剂的CO₂吸附量为0.59 g/g。为探究水合处理对吸附剂碳酸化阶段的反应动力学影响,基于热天平进行了水合活化后吸附剂的第1、10、20次碳酸化,发现蒸汽水合活化可提升吸附剂碳酸化过程产物扩散控制阶段的反应速率。水合活化前后吸附剂颗粒的微观形貌、孔隙结构和机械性能测试结果表明,活化后吸附剂表面出现裂隙,破碎力和抗磨性能显著下降。
- CO₂捕集 /
- 钙基吸附剂 /
- 纤维素模板 /
- 蒸汽水合 /
- 机械性能
Abstract: The modified Ca-based sorbent particles were prepared by the extrusion-spheronization method. The cyclic CO₂ capture capacity was tested using the dual fixed bed reaction system. After 20 cycles, the CO₂ uptake of the sorbents with 5% cement and 10% cellulose added was 0.19 g/g. The modified Ca-based absorbents were treated with separate hydration after the calcination under different steam volume fraction and temperature, to regenerate the CO₂ capture performance. The CO₂ sorption of the modified sorbent was 0.59 g/g after 20 cycles, which was realized by the hydration with 30% steam of 300 ℃. The 1st, 10th, 20th carbonation of the sorbent treated with steam hydration was examined by using the thermal gravimetric analyzer, in order to investigate the effect of hydration treatment on the reaction kinetics of the carbonation stage of the sorbent. It was found that steam hydration reactivation improves the reaction rate of the product layer diffusion control stage of carbonation. Furthermore, the test results of the micro-morphology, pore structure, and mechanical properties of the sorbent particles before and after hydration reactivation showed significant cracks on the surface of the adsorbents after activation, and the crushing force and anti-abrasion properties also decreased remarkably.
- CO₂ capture /
- Ca-based sorbents /
- cellulose template /
- steam hydration /
- mechanical property

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