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Comparative assessment between different sample preparation methodologies for PTGA CO2 adsorption assays—Pellet, powder, and fragment samples
Pontifical Catholic University of Rio Grande do Sul, Brazil.
Pontifical Catholic University of Rio Grande do Sul, Brazil.
Pontifical Catholic University of Rio Grande do Sul, Brazil.
Pontifical Catholic University of Rio Grande do Sul, Brazil.
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2018 (English)In: Adsorption Science and Technology, ISSN 0263-6174, E-ISSN 2048-4038, p. 1-15Article in journal (Refereed) Epub ahead of print
Abstract [en]

The carbon dioxide sorption process at coal seams is very important for understanding the trapping mechanisms of carbon capture and storage. The gas retention capacity of coal seams can be estimated using indirect methods based on the adsorption/desorption isotherms obtained in the laboratory. However, the gas sorption capacity can be overestimated or underestimated depending on the sample preparation. This work evaluates different sample preparations and their theoretical adsorption capacity using coal samples from the Cambui coal field (Parana Basin), southern Brazil. Experiments using a thermogravimetric balance were done to calculate the theoretical adsorption capacity, while sample characterization was done through immediate analysis, elementary analysis, and mineralogical studies. The sample preparations used in this work were powder, pellets, and fragments. While the powder form presents an average behavior, without any experimental complication, the pellet is extremely sensitive to any variation in the sample preparation, such as fractures, and the fragment requires a much longer experiment time than the other sample preparations, being impracticable for some cases.

Place, publisher, year, edition, pages
2018. p. 1-15
Keywords [en]
Thermogravimetric balance, coal, carbon dioxide, adsorption, Pressurized ThermoGravimetric Analyzer (PTGA)
National Category
Analytical Chemistry
Research subject
Natural Science, Chemistry
Identifiers
URN: urn:nbn:se:lnu:diva-74747DOI: 10.1177/0263617418779459OAI: oai:DiVA.org:lnu-74747DiVA, id: diva2:1211408
Available from: 2018-05-30 Created: 2018-05-30 Last updated: 2018-08-10

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Ketzer, João Marcelo M.

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CiteExportLink to record
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  • apa
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  • vancouver
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  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
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  • Other locale
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Output format
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