Changes in mineral fraction and pore morphology of coal with acidification treatment: contribution of clay minerals to methane adsorption.
Acid treatment
Clay minerals
Methane adsorption
Mineral
Pore morphology
Journal
Environmental science and pollution research international
ISSN: 1614-7499
Titre abrégé: Environ Sci Pollut Res Int
Pays: Germany
ID NLM: 9441769
Informations de publication
Date de publication:
Nov 2023
Nov 2023
Historique:
received:
11
06
2023
accepted:
08
10
2023
medline:
29
11
2023
pubmed:
25
10
2023
entrez:
24
10
2023
Statut:
ppublish
Résumé
The accurate calculation of the contribution which provided by clay minerals in coal on methane adsorption not only bares a significant importance for evaluating the effectiveness of acid stimulation in improving permeability and estimating the coalbed methane reserves but also serves a guide for the governance and utilization of methane resources. In this study, hydrochloric acid (HCl) and hydrofluoric acid (HF) were used to remove specific minerals in Qingdong coal samples. We firstly analyzed the mineral compositions of coal samples with different acidification treatments based on the X-ray diffraction (XRD) experiments, together with analysis of the changes in pore morphology and adsorption capacity. The results showed that acidification did not significantly change the shape of the pores, which remained slit-/plate-like pore. However, the altered adsorption capacity of the coal samples was attributed to changes in pore structure and mineral distribution. Acid erosion of mesopores promoted the transition from mesopores to macropores, contributing to an increase of 8.4% and 24.36% in the percentage of macropores in coal samples treated with HCl and HF, respectively. Fractal dimension D
Identifiants
pubmed: 37875755
doi: 10.1007/s11356-023-30414-x
pii: 10.1007/s11356-023-30414-x
doi:
Substances chimiques
Clay
T1FAD4SS2M
Hydrochloric Acid
QTT17582CB
Coal
0
Hydrofluoric Acid
RGL5YE86CZ
Methane
OP0UW79H66
Minerals
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
114886-114900Subventions
Organisme : National Natural Science Foundation of China
ID : 52174216
Organisme : National Natural Science Foundation of China
ID : 51974300
Organisme : Fundamental Research Funds for the Central Universities
ID : 2021YCPY0206
Organisme : Fundamental Research Funds for the Central Universities
ID : 2020ZDPY0224
Organisme : Shandong Engineering Research Center of Mine Gas Disaster Control Open Project
ID : LMYK2022001
Organisme : Shandong Engineering Research Center of Mine Gas Disaster Control Open Project
ID : LMYK2022002
Informations de copyright
© 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
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