Coal microstructural and mechanical alterations induced by supercritical CO2 exposure: Role of water

超临界流体 煤矿开采 溶解 化学工程 材料科学 饱和(图论) 微观结构 化学 复合材料 有机化学 工程类 数学 组合数学
作者
Yongbo Yang,Pengchao Xing,Linchao Dai,Xianfeng Liu,Baisheng Nie
出处
期刊:Fuel [Elsevier]
卷期号:352: 128952-128952 被引量:9
标识
DOI:10.1016/j.fuel.2023.128952
摘要

Injection of CO2 into deep unminable coal reservoirs is regarded as an effective method to reduce greenhouse gas emissions. Coal seams with burial depth > 800 m are the potential reservoirs for CO2 sequestration, and CO2 is stored in the form of supercritical state. The interactions between supercritical CO2 (ScCO2) and coal are a complex process, which has influence on coal structures and strength. Recent studies are rarely reported regarding the impact of ScCO2-coal-water reactions on coal microstructures and mechanical strength. In this paper, comparative analysis was conducted on the microstructural changes and mechanical degradation of coal induced by ScCO2 treatment and ScCO2-water saturation. The results show that water has great influence on coal pore structure, functional groups, mineral compositions and mechanical properties during the reaction. ScCO2 saturation only triggers a small decline of 11.27–17.65% in aliphatic groups in coal, while approximately 62.75–85.92% of aliphatic groups are extracted by ScCO2-water. The largest hysteresis loops are found in samples saturated by ScCO2-water, followed by the specimens treated by ScCO2, illustrating that the complexity of coal pore structure is enhanced by ScCO2 interaction, and the presence of water can further increase the pore roughness. The UCS is reduced by < 13% after ScCO2 saturation on dry coal, but it is greatly decreased by 26.58–44.21% in the presence of water. In the process of interaction, water accelerates the hydrocarbon extraction and mineral dissolution to aggravate the degradation of coal strength. This work is conducive to understanding the process of CO2 geological sequestration.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
大幅提高文件上传限制,最高150M (2024-4-1)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
monere应助cyt9999采纳,获得10
1秒前
qwerasd发布了新的文献求助10
1秒前
科研通AI2S应助ZZZ采纳,获得10
2秒前
顾矜应助唐三神奇采纳,获得10
2秒前
LJ徽完成签到 ,获得积分10
3秒前
领导范儿应助suanquan采纳,获得10
6秒前
6秒前
6秒前
脑洞疼应助鸡腿子采纳,获得10
7秒前
8秒前
8秒前
9秒前
万能图书馆应助胖虎采纳,获得10
9秒前
10秒前
桃桃发布了新的文献求助10
10秒前
11秒前
12秒前
12秒前
12秒前
李健的小迷弟应助宓凌青采纳,获得10
12秒前
12秒前
MorningStar应助杨芬采纳,获得10
13秒前
14秒前
14秒前
14秒前
英俊的铭应助bushuiniao采纳,获得10
14秒前
Lyu发布了新的文献求助10
14秒前
香蕉乐瑶发布了新的文献求助10
15秒前
lv发布了新的文献求助10
16秒前
16秒前
16秒前
ljie发布了新的文献求助10
18秒前
Sky发布了新的文献求助10
18秒前
田様应助和谐的如柏采纳,获得10
19秒前
完美世界应助和谐的如柏采纳,获得10
19秒前
19秒前
20秒前
蓝不住发布了新的文献求助10
20秒前
嘎嘎嘎嘎发布了新的文献求助10
20秒前
20秒前
高分求助中
The late Devonian Standard Conodont Zonation 2000
Nickel superalloy market size, share, growth, trends, and forecast 2023-2030 2000
The Lali Section: An Excellent Reference Section for Upper - Devonian in South China 1500
Mantiden: Faszinierende Lauerjäger Faszinierende Lauerjäger 800
PraxisRatgeber: Mantiden: Faszinierende Lauerjäger 800
Saponins and sapogenins. IX. Saponins and sapogenins of Luffa aegyptica mill seeds (black variety) 500
Fundamentals of Dispersed Multiphase Flows 500
热门求助领域 (近24小时)
化学 医学 生物 材料科学 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 基因 遗传学 催化作用 物理化学 免疫学 量子力学 细胞生物学
热门帖子
关注 科研通微信公众号,转发送积分 3260482
求助须知:如何正确求助?哪些是违规求助? 2901663
关于积分的说明 8316456
捐赠科研通 2571234
什么是DOI,文献DOI怎么找? 1396896
科研通“疑难数据库(出版商)”最低求助积分说明 653598
邀请新用户注册赠送积分活动 632040