Study on the difference of pore structure of anthracite under different particle sizes using low-temperature nitrogen adsorption method

Qi, Lingling; Zhou, Xiaoqing; Peng, Xinshan; Chen, Xiangjun; Wang, Zhaofeng; An, Fenghua

doi:10.1007/s11356-022-22533-8

Cited by 5 publications

(2 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, due to the fact that the type of coal cannot reproduce the real fracture structure of raw coal, the experimental results are different from the actual situation. At present, scanning electron microscopy, CT scanning, MIP, nitrogen adsorption, and NMR technology − are increasingly used in the characterization of the fracture structure of coal rock. Many scholars have made important achievements in the study of coal imbibition based on the above testing techniques.…”

Section: Introductionmentioning

confidence: 99%

Study on the Evolution Law and Mechanism of Fracture Imbibition in Loaded Coal Based on Micro-CT

Yu,

Li,

Gao

et al. 2023

Energy Fuels

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Study on the Evolution Law and Mechanism of Fracture Imbibition in Loaded Coal Based on Micro-CT

Yu,

Li,

Gao

et al. 2023

Energy Fuels

View full text Add to dashboard Cite

“…based on the CT scanning and three-dimensional reconstruction technology, the spatial distribution characteristics of the pore structure were investigated under the aspects of porosity, pore size, and coordination number (Liu et al, 2023;Quan et al, 2022;Jozef et al, 2022). based on mercury intrusion and nitrogen adsorption experiments at low temperatures, the pore structure was investigated from the aspects of adsorption isotherm, pore volume, specific pore surface area, and pore size distribution (Qi et al, 2022;Yuan et al, 2022b). based on the SEM images of the rock, the evolution of cracks is investigated from the aspects of surface microstructure, crack density and damage degree (Xin et al, 2022;Song et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Study on evolution law of pore characteristics of freeze-thaw coal based on fractal theory

Yuan,

Chen,

Wang

et al. 2023

Preprint

View full text Add to dashboard Cite

To investigate the characteristics of pore structure change of coal under freeze-thaw cycles, the surface and internal pore structure distribution of coal samples with long flame and different freeze-thaw times were measured by scanning electron microscopy (SEM) and low-temperature nitrogen adsorption method, and the law of pore structure change of coal after freeze-thaw was analyzed by fractal theory. The results of scanning electron microscopy experiments show that after freeze-thaw, the phenomenon of crack pore enlargement on the surface of coal samples occurs to different extents, and the phenomenon of crack pore enlargement on the surface of coal samples increases with the duration of freeze-thaw; at the same time, the porosity and fractal dimension DS of microcracks on the surface increased by 214.2% and 8.8%, respectively, corresponding to the change of macrocracks. The low-temperature nitrogen adsorption results show that the freezing and thawing changes the internal pore structure from simple to complex, and the maximum nitrogen adsorption capacity, specific surface area and pore volume in the pore parameters increase by 67.57%, 49.12% and 35.55%, respectively, compared with those before freezing and thawing. After freezing and thawing, the fractal dimension of the pores decreased to different degrees in the high-pressure and low-pressure stages. It decreased by 6.6% in the high pressure stage and by 8.9% in the low pressure stage. The change in fractal dimension DL in the low-pressure stage is greater than that of fractal dimension DH in the high-pressure stage, and the difference between the two decreases with increasing number of freeze-thaw cycles.

show abstract

Effects of Different Concentrations of Weak Acid Fracturing Fluid on the Microstructure of Coal

Rui,

Shaojie,

Junting

et al. 2024

Nat Resour Res

View full text Add to dashboard Cite

Study on the difference of pore structure of anthracite under different particle sizes using low-temperature nitrogen adsorption method

Cited by 5 publications

References 58 publications

Study on the Evolution Law and Mechanism of Fracture Imbibition in Loaded Coal Based on Micro-CT

Study on the Evolution Law and Mechanism of Fracture Imbibition in Loaded Coal Based on Micro-CT

Study on evolution law of pore characteristics of freeze-thaw coal based on fractal theory

Effects of Different Concentrations of Weak Acid Fracturing Fluid on the Microstructure of Coal

Contact Info

Product

Resources

About