在潮湿条件下吸附CO2的昆虫衍生生物炭:解吸附机制和与水分子的竞争性相互作用
Jee Young Kim1, Dong-Jun Lee2, Jonghyun Park1
1Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, Republic of Korea.
The Science of the total environment
|January 4, 2025
概括
脱脂的黑兵幼虫生物炭通过化学吸收有效地捕获二氧化碳 (CO2). 较低的温度会增加二氧化碳吸附,尽管水的存在和再生周期会影响效率.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 生物炭的二氧化碳吸附能力受到生物质来源和物理化学特性的影响.
- 温度,二氧化碳度和湿度显著影响吸附性能.
- 脱脂的黑兵幼虫 (BSFL) 生物质为捕获二氧化碳的生物炭提供了潜在的来源.
研究的目的:
- 为了研究从脱脂的BSFL生物质中提取的生物炭的二氧化碳吸附能力.
- 了解吸附机制和影响参数 (温度,湿度).
- 评估BSFL生物炭的循环稳定性,以捕获二氧化碳.
主要方法:
- 描述BSFL生物炭的结构和元素组成.
- 在不同温度 (25-35°C) 和相对湿度下进行二氧化碳吸附实验.
- 使用朗格穆尔异温和动力建模进行分析,以确定吸附机制.
- 循环吸附-脱附试验,以评估材料的可重复使用性.
主要成果:
- BSFL生物炭具有高性和性金属含量的性/半孔性结构,有助于CO2的化学吸收.
- 最佳的二氧化碳吸附发生在25°C,吸附后的Langmuir异温 (单层吸附).
- 物理吸附在化学吸附上占主导地位,水分子与二氧化碳竞争吸附地点.
- 在第一个吸附-脱吸周期后,二氧化碳吸附能力下降了~11%.
结论:
- 由于其有利的物理化学特性,BSFL衍生生物炭是直接捕获二氧化碳的有希望的材料.
- 温度起着至关重要的作用,较低的温度可以提高吸附效率.
- 需要进一步的研究来优化再生过程并改善实际应用的循环稳定性.
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