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Kim, Kwang S.
Center for Superfunctional Materials (CSM)
Research Interests
  • Theoretical/experimental nanosciences, molecular electronics spectroscopy, energy materials

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Activated carbon derived from waste coffee grounds for stable methane storage

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Title
Activated carbon derived from waste coffee grounds for stable methane storage
Author
Kemp, K. ChristianBaek, Seung BinLee, Wang-GeunMeyyappan, M.Kim, Kwang S.
Issue Date
2015-09
Publisher
IOP PUBLISHING LTD
Citation
NANOTECHNOLOGY, v.26, no.38, pp.385602
Abstract
An activated carbon material derived from waste coffee grounds is shown to be an effective and stable medium for methane storage. The sample activated at 900 degrees C displays a surface area of 1040.3 m(2) g(-1) and a micropore volume of 0.574 cm(3) g(-1) and exhibits a stable CH4 adsorption capacity of similar to 4.2 mmol g(-1) at 3.0 MPa and a temperature range of 298 +/- 10 K. The same material exhibits an impressive hydrogen storage capacity of 1.75 wt% as well at 77 K and 100 kPa. Here, we also propose a mechanism for the formation of activated carbon from spent coffee grounds. At low temperatures, the material has two distinct types with low and high surface areas; however, activation at elevated temperatures drives off the low surface area carbon, leaving behind the porous high surface area activated carbon
URI
https://scholarworks.unist.ac.kr/handle/201301/17444
URL
http://iopscience.iop.org/article/10.1088/0957-4484/26/38/385602/meta;jsessionid=21E201A4C7D41DA10C0A617C6E9E2780.c1
DOI
10.1088/0957-4484/26/38/385602
ISSN
0957-4484
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CHM_Journal Papers
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