优化CO2捕获:化学功能化对木片生物炭吸附性能的影响
Antonio Faggiano1, Angela Cicatelli1, Francesco Guarino1
1Department of Chemistry and Biology "Adolfo Zambelli", University of Salerno, via Giovanni Paolo II 132, 84084, Fisciano, SA, Italy.
Journal of environmental management
|March 21, 2025
概括
化学功能化的木片生物炭 (WBC) 提高了其二氧化碳 (CO2) 吸附能力. 氧化 (KOH) 处理产生了最高的二氧化碳捕获,为减缓气候变化提供了可持续的解决方案.
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:
- 大气中二氧化碳 (CO2) 度的上升需要有效的碳捕获技术.
- 化石燃料的燃烧和森林砍伐是二氧化碳水平上升的主要驱动因素.
- 木片生物炭 (WBC) 显示了吸附二氧化碳的潜力,但需要加强.
研究的目的:
- 通过化学功能化来研究WBC中二氧化碳吸附的增强.
- 使用中央复合设计 (CCD) 和响应表面方法 (RSM) 确定最佳的功能化条件.
- 评估功能化WBC的吸附能力和机制.
主要方法:
- 使用氧化 (KOH),氧化 (NaOH) 和硫酸铁 (FeSO4) 的WBC的化学功能化.
- 使用CCD和RSM优化功能化条件.
- 对二氧化碳吸附等温体 (Langmuir, Freundlich) 和动力学 (PFO, PSO) 的分析.
主要成果:
- 经KOH处理的WBC表现出最高的CO2吸附能力 (9.89 mmol/g),比未经处理的WBC (4.54 mmol/g) 显著改善.
- 吸附遵循兰格穆尔模型,表明单层吸附.
- 伪二阶 (PSO) 模型最好地描述了化学吸收动力学.
结论:
- 化学功能化WBC,特别是KOH,是捕获二氧化碳的有希望的材料.
- 这种方法为减少二氧化碳排放和废物利用提供了一个环境可持续的途径.
- 优化的生物炭可以为气候变化缓解战略做出贡献,特别是当大规模部署时.
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