A comparative study of the nanopore structure characteristics of coals and Longmaxi shales in China
文献类型:期刊论文
作者 | Zhou SW1,2; Liu HL1,2; Chen H1,2; Wang HY1,2; Guo W1,2; Liu DX1,2; Zhang Q1,2; Wu J1,2; Shen WJ (沈伟军)3 |
刊名 | ENERGY SCIENCE & ENGINEERING |
出版日期 | 2019-09-05 |
页码 | 14 |
ISSN号 | 2050-0505 |
关键词 | adsorption capacity CBM nanopore structure SEM shale gas specific surface area |
DOI | 10.1002/ese3.458 |
英文摘要 | Both of the coalbed methane (CBM) and shale gas reservoirs are dominated by nanometer-scale pores with their nanopore structures controlling the occurrence, enrichment, and accumulation of natural gas. Low-pressure nitrogen gas adsorption (LP-N(2)GA), low-pressure carbon dioxide gas adsorption (LP-CO(2)GA), high-pressure methane adsorption (HPMA), and field emission scanning electron microscope (FE-SEM) experiments were conducted on 14 different-rank coal samples and nine Longmaxi shale samples collected from various basins in China to compare their nanopore characteristics. The FE-SEM results indicate that the pore structures of both the coal and shale samples consist of nanometer-sized pores that primarily developed in the organic matter. The types of their isothermal adsorption curves are similar. However, the coal and shale samples possess various hysteresis loops, which suggest that the nanopores in shale are open-plated, whereas those in coal are semi-open. Furthermore, the specific surface area (SSA) and pore volume (PV) of the micropores in coal are much larger than those of the mesopores, with the micropore SSAs accounting for 99% of the total SSA in the coal samples. However, the micropore SSAs in the shale samples only account 42.24% of the total SSA. These different nanopore structures reflect their different methane adsorption mechanisms. The methane adsorption of coal is primarily controlled by the micropore SSA, whereas that of shale is primarily controlled by the mesopore SSA. If we use mesopore SSA to analyze its impact on methane adsorption capacity of coal and shale, it will be mismatched. However, no mismatching relationship exists between the total SSAs and adsorption capacities of coal and shale. This study highlights the controlling effect of total SSA on methane adsorption capacity. |
分类号 | Q3 |
WOS关键词 | PORE STRUCTURE CHARACTERIZATION ; NUCLEAR-MAGNETIC-RESONANCE ; CH4 ADSORPTION CAPACITY ; GAS-ADSORPTION ; RANK COALS ; SIZE DISTRIBUTIONS ; METHANE ADSORPTION ; FRACTURE NETWORKS ; MERCURY INTRUSION ; N-2 ADSORPTION |
资助项目 | National Science and Technology Major Project[2017ZX05035002-002] |
WOS研究方向 | Energy & Fuels |
语种 | 英语 |
WOS记录号 | WOS:000485051500001 |
源URL | [http://dspace.imech.ac.cn/handle/311007/79408] |
专题 | 力学研究所_流固耦合系统力学重点实验室(2012-) |
通讯作者 | Liu HL |
作者单位 | 1.PetroChina Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China 2.Natl Energy Shale Gas R&D Expt Ctr, Langfang, Peoples R China 3.Chinese Acad Sci, Inst Mech, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Zhou SW,Liu HL,Chen H,et al. A comparative study of the nanopore structure characteristics of coals and Longmaxi shales in China[J]. ENERGY SCIENCE & ENGINEERING,2019:14. |
APA | Zhou SW.,Liu HL.,Chen H.,Wang HY.,Guo W.,...&Shen WJ .(2019).A comparative study of the nanopore structure characteristics of coals and Longmaxi shales in China.ENERGY SCIENCE & ENGINEERING,14. |
MLA | Zhou SW,et al."A comparative study of the nanopore structure characteristics of coals and Longmaxi shales in China".ENERGY SCIENCE & ENGINEERING (2019):14. |
入库方式: OAI收割
来源:力学研究所
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