有效的CO2吸附使用奇托,石墨烯氧化物和氧化复合物
Farnoush Fathalian1, Hamidreza Moghadamzadeh2, Alireza Hemmati3
1Department of Chemical Engineering, Faculty of Engineering, Islamic Azad University, South Tehran Branch, Tehran, Iran.
Scientific reports
|February 7, 2024
概括
一种由素 (CTS),石墨烯氧化物 (GO) 和氧化 (ZnO) 纳米颗粒制成的新型复合吸附剂被开发出来,用于高效的二氧化碳 (CO2) 捕获. 这种材料显示出出色的二氧化碳吸收能力和良好的可重复使用性,适用于工业应用.
科学领域:
- 材料科学与工程 材料科学与工程
- 环境科学与技术 环境科学与技术
- 化学工程是化学工程的重要组成部分.
背景情况:
- 对大气中二氧化碳 (CO2) 水平的日益关注迫使开发高效的二氧化碳捕获技术.
- 复合材料提供可调节的性能,以提高吸附性能.
- 基托 (CTS),石墨烯氧化物 (GO) 和氧化 (ZnO) 在二氧化碳吸附方面的潜力正在被探索.
研究的目的:
- 为了合成和描述一种新的CTS/GO/ZnO复合物,以实现高效的二氧化碳吸附.
- 使用基于响应表面方法 (RSM) 的实验设计 (DOE) 优化二氧化碳吸附过程,采用盒式设计 (BBD).
- 研究吸附机制,动力学和热力学,并评估吸附剂的可重复使用性.
主要方法:
- 合成CTS/GO/ZnO复合材料,具有不同的GO和ZnO负载.
- 卷度吸附装置用于测量在不同温度 (25-65°C) 和压力 (1-9bar) 下的二氧化碳吸收量.
- RSM-BBD用于实验设计和优化;同热,动力和热力学建模.
主要成果:
- 优化的复合材料 (23.8%重量GO,18.2%重量ZnO) 在30.1°C和8.6 bar时达到470.43 mg/g的最大二氧化碳吸收率.
- 弗洛伊德利希和分数顺序模型最好地描述了吸附等热量和动力学,分别 (R2 = 0.99).
- 热力学分析显示出一种外热,自发和物理吸收过程 (ΔH° = -19.121 kJ/mol, ΔG° = -9.608 kJ/mol).
- 吸附剂表现出良好的强度,在经过十个再生周期后,效率损失仅为4.35%.
结论:
- 开发的CTS/GO/ZnO复合物是一种高效和可再生的吸收剂,用于二氧化碳捕获.
- 该研究使用RSM-BBD成功优化了吸附过程参数.
- 这些发现支持这种复合材料在工业二氧化碳捕获应用中的潜力.
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