An adsorption model for cylindrical pore and its method to calculate pore size distribution of coal by combining NMR

吸附 大孔隙 介孔材料 多孔性 材料科学 半径 体积热力学 矿物学 化学 热力学 复合材料 有机化学 物理 计算机科学 计算机安全 催化作用
作者
Chaolin Wang,Kunpeng Zhang,Yu Zhao,Jing Bi,Lin Ning,Kun Zhang
出处
期刊:Chemical Engineering Journal [Elsevier BV]
卷期号:450: 138415-138415 被引量:26
标识
DOI:10.1016/j.cej.2022.138415
摘要

Coalbed methane (CBM) adsorption is closely related to pore size distribution in coal, the study of its adsorption state and pore characteristics of coal are of great significance to its exploitation and storage. In this paper, an extended simplified local density adsorption (SLD) model is proposed, which can be applied to cylindrical pores. Combining with the nuclear magnetic resonance (NMR) tests, the extended SLD model can predict the adsorption amount and pore size distribution of the whole sample without destroying its original pore structure. Three coal samples collected from different areas are selected for NMR test to measure T2 distribution and Magnetic Resonance Imaging (MRI) image. Then, the adsorption amount of the samples are obtained under constant temperature and different pressures. The fitting coefficients of the extend SLD model and experimental data of the three samples are all greater than 0.99, indicating that the proposed model matches the experimental results well. The two parameters obtained by fitting, transverse surface relaxivity (K) and the total number of pore (N), combined with T2, can get the radius and number of each pore in the sample. The inversion results show that the number summation of micropores and mesopores of the three samples are all exceeds 99%. However, due to the small pore size of micropores and mesopores, the pore volume summation of the three coal samples occupied by fractures and macropores are all over 27%. Further observation of cylindrical pore size and fluid molecular position shows that the distance between fluid-solid molecules is the main factor affecting the adsorption. The results of this paper are beneficial to predict and calculate the adsorption amount and pore size distribution of coal.
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
3秒前
科研通AI5应助大橙子采纳,获得10
4秒前
Rubby应助科研通管家采纳,获得10
4秒前
4秒前
5秒前
传奇3应助科研通管家采纳,获得10
5秒前
5秒前
俏皮火完成签到 ,获得积分10
5秒前
一一一应助Bin_Liu采纳,获得10
5秒前
6秒前
啾啾啾完成签到,获得积分20
7秒前
Wang完成签到,获得积分10
8秒前
10秒前
啾啾啾发布了新的文献求助10
10秒前
CHSLN完成签到 ,获得积分10
11秒前
biofresh发布了新的文献求助30
11秒前
11秒前
12秒前
超级无敌奥特大王完成签到,获得积分10
12秒前
NexusExplorer应助小包子采纳,获得10
12秒前
努力向前看完成签到,获得积分10
14秒前
14秒前
14秒前
agnes完成签到,获得积分10
15秒前
失眠的向日葵完成签到 ,获得积分10
15秒前
大橙子发布了新的文献求助10
16秒前
18秒前
19秒前
qq完成签到,获得积分10
20秒前
王二哈完成签到,获得积分10
21秒前
行者无疆发布了新的文献求助10
22秒前
令散内方完成签到,获得积分10
22秒前
外向的雁玉完成签到,获得积分10
22秒前
慧灰huihui发布了新的文献求助10
23秒前
Ava应助Desire采纳,获得10
24秒前
量子星尘发布了新的文献求助10
27秒前
风信子完成签到,获得积分10
27秒前
小熊完成签到 ,获得积分10
29秒前
33秒前
shu完成签到,获得积分10
33秒前
高分求助中
【提示信息,请勿应助】关于scihub 10000
Les Mantodea de Guyane: Insecta, Polyneoptera [The Mantids of French Guiana] 3000
徐淮辽南地区新元古代叠层石及生物地层 3000
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
Handbook of Industrial Diamonds.Vol2 1100
Global Eyelash Assessment scale (GEA) 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 550
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 4038201
求助须知:如何正确求助?哪些是违规求助? 3575940
关于积分的说明 11373987
捐赠科研通 3305747
什么是DOI,文献DOI怎么找? 1819274
邀请新用户注册赠送积分活动 892662
科研通“疑难数据库(出版商)”最低求助积分说明 815022