氨基酸辅助作用于以水合物为基础的CO2存储在带盐水的多孔介质中
Amirun Nissa Rehman1, Cornelius Borecho Bavoh2, Mohd Yusuf Khan1
1Interdisciplinary Research Center for Hydrogen Technologies and Carbon Management, King Fahd University of Petroleum & Minerals Dhahran 31261 Saudi Arabia amirunrehman2728@gmail.com.
RSC advances
|March 20, 2024
概括
像l-methionine这样的氨基酸显著增强碳二氧化物 (CO2) 在多孔介质中的水合物中的储存. 这项研究表明,l-氨酸改善了二氧化碳水合物的形成和稳定性,使其成为二氧化碳封存的有希望的促进剂.
科学领域:
- 地质化学和环境科学
- 材料科学与工程 材料科学与工程
背景情况:
- 在多孔介质中的水合物中储存二氧化碳 (CO2) 是一种可行的碳捕集策略.
- 水合物形成的缓慢动力学需要使用促进剂来加速过程.
- 氨基酸被探索为二氧化碳水合物形成和解离的潜在促进剂.
研究的目的:
- 研究氨基酸溶液对二氧化碳水合物形成和石英沙中的解离动力学的影响.
- 评估l-氨酸,l-异氨酸和l-氨酸作为碳水化合物中二氧化碳储存的促进剂.
主要方法:
- 实验是在一个自闭体水合物反应堆中进行的,使用38%的孔径的石英砂 (QS-2).
- 氨基酸 (l-methionine,l-isoleucine,l-threonine) 在含有和没有NaCl的盐水中测试了0.2%重量%.
- 分别在4MPa,274.15K和277.15K时研究了二氧化碳水合物形成和解离动力学.
- 与二硫酸盐 (SDS) 作为常规促进剂进行了比较.
主要成果:
- 氨酸表现出最有效的动力学,在含盐水的石英沙中达到大约93%的气体到水合物转化率.
- 与其他氨基酸相比,L-氨酸表现出最低的解离率,增强了CO2水合物稳定性.
- 与SDS相比,l-氨酸增加了36%的储存能力,并将诱导时间缩短了50%以上.
- 使用l-methionine,高精度 (2,4小时绝对平均偏差) 预测了CO2水合物核化时间.
结论:
- 氨基酸,特别是l-氨酸,是有效的促进剂,可以加速二氧化碳水合物形成,并改善多孔介质中的储存能力.
- L-氨酸增强了二氧化碳水合物稳定性,并为二氧化碳封存应用提供了相对于传统促进剂 (如SDS) 的显著优势.
- 这些发现支持使用氨基酸促进沉积物中的二氧化碳储存作为水合物.
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