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对CO2捕获到AMP/PZ/DME固体液体双相溶剂中的反应动力学

Xiaoyun Chen¹, Guohua Jing¹, Bihong Lv¹

¹Department of Environmental Science & Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, Fujian 361021, China.

Journal of environmental sciences (China)

|September 21, 2024

概括

这项研究研究了使用新型固体液体溶剂的二氧化碳捕获动力学. 较高的温度通过降低质量转移阻力来提高吸收率,这对于有效的碳捕获至关重要.

科学领域:

化学工程是化学工程的重要组成部分.
环境科学环境科学
材料科学材料科学材料科学

背景情况:

非水性固体-液体双相溶剂在二氧化碳捕获方面具有优势,包括高负载和再生效率.
与液体-液体系统相比,这些固体-液体系统中二氧化碳吸收的反应动力学理解程度较低.

研究的目的:

为了研究二氧化碳吸收到2-氨基-2-甲基-1-醇 (AMP) /皮佩拉зин (PZ) /二烯糖醇二甲基乙醇 (DME) 固体-液体双相溶剂中的反应动力学.
确定动力模型并确定影响二氧化碳吸收率的因素.

主要方法:

使用双水反应器研究二氧化碳吸收动力学.
分析反应数据以确定动力模型,总反应速率常数 (k_ov) 和增强因子 (E).
研究了温度和吸收负荷对质量转移电阻的影响.

主要成果:

二氧化碳吸收反应通过zwitterion机制遵循一个伪第一阶动力模型.
总反应速率常数 (k_ov) 和增强因子 (E) 都随着温度的增加而增加.
总质量转移阻力随着温度的增加而降低,随着吸收负载而增加.

结论:

更高的反应温度有利于AMP/PZ/DME系统中二氧化碳的吸收.
液相质量转移阻力是限制二氧化碳吸收率的主要因素.
了解这些动力学对于优化碳捕获技术中固体-液体双相溶剂性能至关重要.

关键词:

) 捕获的二氧化碳.热负担是热负担.反应动力学反应动力学固体 - 液体相变 - 变相

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