Response of Molecular Structures and Methane Adsorption Behaviors in Coals Subjected to Cyclical Microwave Exposure

吸附 甲烷 化学 朗缪尔 碳氢化合物 朗缪尔吸附模型 萃取(化学) 傅里叶变换红外光谱 分析化学(期刊) 化学工程 有机化学 环境化学 工程类
作者
Liankun Zhang,Tianhe Kang,Jianting Kang,Xiaoyu Zhang,Bin Zhang,Jun-Qing Guo,Zhaoyun Chai
出处
期刊:ACS omega [American Chemical Society]
卷期号:6 (47): 31566-31577 被引量:6
标识
DOI:10.1021/acsomega.1c04056
摘要

To better understand the methane adsorption behavior after microwave exposure, the importance of quantitatively characterizing the effect of cyclical microwave exposure on the molecular structures of coals cannot be overemphasized, with implications for enhancing coalbed methane (CBM) extraction. Thus, cyclical microwave exposure experiments of three different metamorphic coals were conducted, and the methane adsorption capacity before and after each microwave exposure (10 in total) for 120 s was evaluated. Fourier transform infrared spectroscopy analysis and peak fitting technology were applied to quantitatively characterize the changes in the structural parameters of coal molecules. The results showed that after modification, the structural parameters like aromatic carbon fraction (fa-F), aromaticity (I1 and I2), degree of condensation (DOC1 and DOC2), and the maturity of organic matter ("C") gradually increased with increasing exposure times, while the length of the aliphatic chain or its branching degree (CH2/CH3) and the hydrocarbon generating capacity ("A") showed a decreasing trend. The Langmuir volume (VL) of three different rank coal samples decreased from 29.2, 32.8, and 40.4 mL/g to 25.7, 29.3, and 35.7 mL/g, respectively; the Langmuir pressure (PL) increased from 0.588, 0.844, and 0.942 MPa to 0.626, 1.007, and 1.139 MPa, respectively. The modification mechanism was investigated by analyzing the relationship between the methane adsorption behaviors and molecular structures in coals. The release of alkane side chains and the oxidation of oxygen-containing functional groups caused by microwave exposure decreased the number of methane adsorption sites. As a result, the methane adsorption capability decreased. In addition, the decomposition of minerals affects methane adsorption behaviors in coals. This work provides a basis for microwave modification of coal as well as in situ enhancement of CBM extraction using microwave exposure.
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
PDF的下载单位、IP信息已删除 (2025-6-4)

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
刚刚
Billie完成签到,获得积分10
刚刚
刚刚
1秒前
111发布了新的文献求助10
1秒前
FnDs完成签到,获得积分10
2秒前
未来完成签到,获得积分10
3秒前
不一样的烟火完成签到,获得积分10
3秒前
3秒前
时钟发布了新的文献求助10
4秒前
4秒前
等等完成签到,获得积分10
5秒前
Willow完成签到,获得积分10
5秒前
华仔应助弗洛莉娅采纳,获得10
5秒前
5秒前
nimo发布了新的文献求助20
5秒前
李健的粉丝团团长应助zz采纳,获得10
5秒前
6秒前
明明明明明明明明z完成签到,获得积分10
6秒前
Ray发布了新的文献求助10
6秒前
小溪溪发布了新的文献求助10
6秒前
青青完成签到,获得积分10
6秒前
7秒前
波波七发布了新的文献求助50
7秒前
7秒前
大模型应助安河桥采纳,获得10
7秒前
小欣完成签到,获得积分10
7秒前
LILI完成签到 ,获得积分20
8秒前
SC发布了新的文献求助10
8秒前
8秒前
amberxie发布了新的文献求助10
8秒前
上好佳发布了新的文献求助10
8秒前
HD完成签到,获得积分10
8秒前
SciGPT应助fyl采纳,获得10
9秒前
sino-ft完成签到,获得积分10
10秒前
10秒前
温婉的从凝完成签到,获得积分20
10秒前
SYLH完成签到,获得积分0
11秒前
阳和启蛰完成签到 ,获得积分10
12秒前
小滨发布了新的文献求助10
12秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Cognitive Neuroscience: The Biology of the Mind 1000
Technical Brochure TB 814: LPIT applications in HV gas insulated switchgear 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Picture Books with Same-sex Parented Families: Unintentional Censorship 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
热门求助领域 (近24小时)
化学 材料科学 医学 生物 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 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3969094
求助须知:如何正确求助?哪些是违规求助? 3514055
关于积分的说明 11171564
捐赠科研通 3249344
什么是DOI,文献DOI怎么找? 1794799
邀请新用户注册赠送积分活动 875377
科研通“疑难数据库(出版商)”最低求助积分说明 804779