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Two types of natural graphite host matrix for composite activated carbon adsorbents
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Wang, L. W., Metcalf, Steven J., Critoph, Robert E., Tamainot-Telto, Zacharie and Thorpe, Roger (2013) Two types of natural graphite host matrix for composite activated carbon adsorbents. Applied Thermal Engineering, Vol.50 (No.2). pp. 1652-1657. doi:10.1016/j.applthermaleng.2011.07.011
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Official URL: http://dx.doi.org/10.1016/j.applthermaleng.2011.07...
Abstract
Two types of host for activated carbon (AC) adsorbents intended for use in compressed systems are studied: expanded natural graphite (ENG) and expanded natural graphite treated with acid (ENG-TA). Results show that compressed ENG-TA has much higher thermal conductivity than the compressed ENG. For a density of 830 kg/m3 the thermal conductivity of compressed ENG-TA is 336 W/(mK), and it is of the order of one hundred times higher compared with compressed ENG having similar density. The permeability of compressed ENG-TA is much more critical than the compressed ENG. For example for similar density of 300 kg/m3, the permeability of compressed ENG-TA is 2.01 × 10−15 m2 while the permeability of compressed ENG is 1.07 × 10−13 m2. Compressed composite adsorbents of AC with ENG as host were produced with a high density in the range 700–720 kg/m3. Considering that the permeability will be too low using composite AC with ENG-TA as host in high density, the density range was restricted to less than 500 kg/m3. The thermal conductivity of AC/ENG-TA composite is much higher than the thermal conductivity of AC/ENG composite, and it is about 7 times higher than the optimal value of AC/ENG composite.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Divisions: | Faculty of Science > Engineering | ||||
| Journal or Publication Title: | Applied Thermal Engineering | ||||
| Publisher: | Pergamon | ||||
| ISSN: | 1359-4311 | ||||
| Official Date: | February 2013 | ||||
| Dates: |
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| Volume: | Vol.50 | ||||
| Number: | No.2 | ||||
| Page Range: | pp. 1652-1657 | ||||
| DOI: | 10.1016/j.applthermaleng.2011.07.011 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Description: | Combined Special Issues: ECP 2011 and IMPRES 2010 |
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