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Title: Calibrated dilatometer exercise to probe thermoplastic properties of coal in pressurized CO 2

This research was aimed at testing a hypothesis, that at elevated CO 2 pressure coal can soften at temperatures well below those obtained in the presence of other gases. That could have serious negative implications for injection of CO 2 into deep coal seams. Here, we have examined the experimental design issues and procedures used in the previously published studies, and experimentally investigated the physical behavior of a similar coal in the presence of CO 2 as a function of pressure and temperature, using the same high-pressure micro-dilatometer refurbished and carefully calibrated for this purpose. No notable reduction in coal softening temperature was observed in this study.
Authors:
 [1] ;  [1] ;  [1]
  1. National Energy Technology Lab. (NETL), Pittsburgh, PA, (United States)
Publication Date:
Report Number(s):
NETL-PUB-20273
Journal ID: ISSN 2095-8293; PII: 171
Type:
Accepted Manuscript
Journal Name:
International Journal of Coal Science & Technology
Additional Journal Information:
Journal Volume: 4; Journal Issue: 3; Journal ID: ISSN 2095-8293
Publisher:
Springer
Research Org:
National Energy Technology Lab. (NETL), Pittsburgh, PA, and Morgantown, WV (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 36 MATERIALS SCIENCE; 47 OTHER INSTRUMENTATION; 58 GEOSCIENCES; 54 ENVIRONMENTAL SCIENCES; Dilatometer; Carbon Dioxide; Coal; Plasticization
OSTI Identifier:
1404701