调查 NaCl 度对 CO2 的影响 水化合物形成动力学: CO2 封存的实验和建模见解
Eti Pagar1, Avinash V Palodkar2,3, Vimal Kumar1
1Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India.
Chem & bio engineering
|March 4, 2026
概括
二氧化碳 (CO2) 在气体水合物中被封存,可在海洋沉积物中安全储存. 这项研究表明,较高的盐度会抑制二氧化碳水合物形成,但l-leucine会增强它,改善储存能力.
科学领域:
- 地质化学和海洋地质学
- 化学工程是化学工程的重要组成部分.
- 环境科学 环境科学
背景情况:
- 基于气体水合物的二氧化碳 (CO2) 捕获是一种有前途的方法,可以在海洋环境中永久存储二氧化碳,因为它具有稳定性和安全性.
- 海水的盐度,以NaCl为特征,显著影响二氧化碳水合物形成动力学,热力学稳定性和储存能力,这带来了以前单度研究尚未完全解决的挑战.
研究的目的:
- 系统地研究二氧化碳水合物形成的动力学在砂矩阵在一个广泛的NaCl度 (0-5.0重量%) 的范围.
- 用化学潜力驱动模型阐明不同盐含量对二氧化碳水化合物形成动态的影响.
- 为了评估l-leucine (LL) 在高盐度条件下作为动态水合物促进剂的有效性,以增强二氧化碳封存.
主要方法:
- 在和不同度的NaCl溶液中的二氧化碳水合物形成动力学的实验研究.
- 开发和应用化学潜力驱动模型来分析动力数据.
- 评估二氧化碳水合物形成速度和气体吸收率,有或没有添加l-leucine.
主要成果:
- 较高的NaCl度 (≥3重 %) 显著抑制了CO2水合物形成的速度,证实了盐度的抑制作用.
- 添加2.0重%的l-leucine在5.0重%NaCl的存在下,增加了大约2.6倍的气体吸收,证明了其作为促进剂的有效性.
- 拟议的模型准确地反映了不同盐度水平和添加场景的二氧化碳水合物形成动态.
结论:
- 盐度是控制二氧化碳水合物形成动力学的关键因素,NaCl度的增加阻碍了这一过程.
- 可生物降解的氨基酸l-leucine显示出作为一种运动促进剂的显著潜力,以克服盐诱导的抑制,增强CO2储存能力在水合物形成.
- 开发的模型为了解和优化使用盐水环境中的气体酸盐的二氧化碳封存策略提供了有价值的工具.
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