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Effect of Electrolyte pH on CH(4) Adsorption and Desorption Behavior in Electrochemically Modified Lean Coal
[Image: see text] Practical application of the electrochemical method for enhancing coalbed methane (CBM) extraction is limited due to the insufficiency of in-depth experimental and theoretical research. Therefore, H(2)SO(4), Na(2)SO(4), and NaOH electrolytes with different pH values were selected t...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2021
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8340380/ https://www.ncbi.nlm.nih.gov/pubmed/34368561 http://dx.doi.org/10.1021/acsomega.1c02418 |
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author | Li, Ligong Li, Yanbin |
author_facet | Li, Ligong Li, Yanbin |
author_sort | Li, Ligong |
collection | PubMed |
description | [Image: see text] Practical application of the electrochemical method for enhancing coalbed methane (CBM) extraction is limited due to the insufficiency of in-depth experimental and theoretical research. Therefore, H(2)SO(4), Na(2)SO(4), and NaOH electrolytes with different pH values were selected to electrochemically modify lean coals and their CH(4) adsorption and desorption behaviors were tested. The experimental results showed that the amount of CH(4) adsorption decreased after modification using H(2)SO(4) and Na(2)SO(4) electrolytes, and increased after electrochemical modification using the NaOH electrolyte. The ratio of CH(4) desorption increased from 83.20 to 90.10 and 87.84%, respectively, after electrochemical modification using H(2)SO(4) and Na(2)SO(4) electrolytes, and decreased to 81.71% after electrochemical modification using the NaOH electrolyte. The pore volume and average pore size increased, and the specific surface area decreased with the decrease of electrolyte pH. Lower pH electrolytes perform better and the mechanism was analyzed by the change of surface energy, surface groups, and pore structures. The work will provide a basis for the reasonable selection of electrolyte pH when using in situ electrochemical methods for enhancing CBM extraction. |
format | Online Article Text |
id | pubmed-8340380 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-83403802021-08-06 Effect of Electrolyte pH on CH(4) Adsorption and Desorption Behavior in Electrochemically Modified Lean Coal Li, Ligong Li, Yanbin ACS Omega [Image: see text] Practical application of the electrochemical method for enhancing coalbed methane (CBM) extraction is limited due to the insufficiency of in-depth experimental and theoretical research. Therefore, H(2)SO(4), Na(2)SO(4), and NaOH electrolytes with different pH values were selected to electrochemically modify lean coals and their CH(4) adsorption and desorption behaviors were tested. The experimental results showed that the amount of CH(4) adsorption decreased after modification using H(2)SO(4) and Na(2)SO(4) electrolytes, and increased after electrochemical modification using the NaOH electrolyte. The ratio of CH(4) desorption increased from 83.20 to 90.10 and 87.84%, respectively, after electrochemical modification using H(2)SO(4) and Na(2)SO(4) electrolytes, and decreased to 81.71% after electrochemical modification using the NaOH electrolyte. The pore volume and average pore size increased, and the specific surface area decreased with the decrease of electrolyte pH. Lower pH electrolytes perform better and the mechanism was analyzed by the change of surface energy, surface groups, and pore structures. The work will provide a basis for the reasonable selection of electrolyte pH when using in situ electrochemical methods for enhancing CBM extraction. American Chemical Society 2021-07-19 /pmc/articles/PMC8340380/ /pubmed/34368561 http://dx.doi.org/10.1021/acsomega.1c02418 Text en © 2021 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Li, Ligong Li, Yanbin Effect of Electrolyte pH on CH(4) Adsorption and Desorption Behavior in Electrochemically Modified Lean Coal |
title | Effect of Electrolyte pH on CH(4) Adsorption
and Desorption Behavior in Electrochemically Modified Lean Coal |
title_full | Effect of Electrolyte pH on CH(4) Adsorption
and Desorption Behavior in Electrochemically Modified Lean Coal |
title_fullStr | Effect of Electrolyte pH on CH(4) Adsorption
and Desorption Behavior in Electrochemically Modified Lean Coal |
title_full_unstemmed | Effect of Electrolyte pH on CH(4) Adsorption
and Desorption Behavior in Electrochemically Modified Lean Coal |
title_short | Effect of Electrolyte pH on CH(4) Adsorption
and Desorption Behavior in Electrochemically Modified Lean Coal |
title_sort | effect of electrolyte ph on ch(4) adsorption
and desorption behavior in electrochemically modified lean coal |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8340380/ https://www.ncbi.nlm.nih.gov/pubmed/34368561 http://dx.doi.org/10.1021/acsomega.1c02418 |
work_keys_str_mv | AT liligong effectofelectrolytephonch4adsorptionanddesorptionbehaviorinelectrochemicallymodifiedleancoal AT liyanbin effectofelectrolytephonch4adsorptionanddesorptionbehaviorinelectrochemicallymodifiedleancoal |