气体水合物合成研究进展
Research progress of gas hydrate synthesis
吴财芳 1高彬 1李清 2陈贞龙2
作者信息
- 1. 中国矿业大学教育部煤层气资源与成藏过程重点实验室,江苏徐州 221116;中国矿业大学资源与地球科学学院,江苏徐州 221116
- 2. 中国石化华东油气分公司,江苏南京 210000
- 折叠
摘要
水合物法捕集与封存CO2气体可服务于大规模减排的技术需求,加速"碳中和"目标的实现,对应对气候变化具有重要意义.从气体水合物的基本性质、生成机理及模型,多孔介质中水合物合成,水合物合成的分子动力学模拟等方面,综述了前人针对水合物合成领域的研究现状,提出了气体水合物合成过程中存在的科学问题,并对气体水合物的发展及煤系地层CO2水合物的封存方向进行了评价.研究认为,CO2气体的溶解度是限制准确计算多孔介质中水合物储气量的关键因素;气体水合物的局部结构化(成核)机制复杂,仍需深入研究;高纬度及永久冻土区煤系地层可作为水合物法封存CO2气体的地下空间.
Abstract
The utilization of hydrate-based capture and storage of CO2 presents a promising avenue for substantial emissions reduction,contributing significantly to achieving carbon neutrality goals and addressing climate change.This paper delves into the foundational aspects of gas hydrates,including their properties,formation mechanisms,and models,as well as hydrate synthesis within porous media and the use of molecular dynamics simulations for understanding hydrate formation.Key challenges identified in the synthesis process of gas hydrates include the limited solubility of CO2 in porous media,which poses a significant hurdle in precisely determining the storage capacity of CO2 hydrates.Additionally,the local structural mechanisms,particularly nucleation processes involved in gas hydrate formation,are highlighted as complex areas that warrant further investigation.The paper also evaluates the potential of coal-bearing strata,especially in high-latitude and permafrost regions,as viable underground repositories for CO2 storage via hydrate formation.This approach not only offers a method for reducing atmospheric CO2 levels but also leverages the unique geological characteristics of these regions to enhance the efficiency and stability of CO2 storage.In summary,while hydrate-based CO2 capture and storage technologies hold considerable promise for climate change mitigation,addressing the scientific and technical challenges identified in this review is crucial for advancing the field and optimizing the efficacy of this storage method.
关键词
水合物/碳中和/煤基介质/CO2水合物合成/研究进展Key words
hydrate/carbon neutralization/coal-based medium/CO2 hydrate synthesis/research progress引用本文复制引用
基金项目
国家自然科学基金面上项目(41872170)
国家自然科学基金重点项目(42130802)
贵州省科技计划([2022]ZD001)
贵州省科技计划(CXTD[2022]016)
出版年
2024
NETL
NSTL
万方数据