Preparation of a highly microporous carbon from a carpet material and its application as CO2 sorbent

Mara Olivares-Marin, M Mercedes Maroto-Valer

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37 Citations (Scopus)

Abstract

In order to increase the use of carpet wastes (pre- and/or post-consumer wastes), this work studies for the first time the preparation and characterisation of a microporous material from a commercial carpet (pile fiber content: 80% wool/20% nylon; primary and secondary backings: woven polypropylene; binder: polyethylene) and its application for CO2 capture. The porous material was prepared from an entire carpet material using a standard chemical activation with KOH and then, characterised in terms of their porous structure and surface functional groups. Adsorption of CO2 was studied using a thermogravimetric analyser at several temperatures (25-100 degrees C) and under different CO2 partial pressures (i.e. pure CO2 flow and a ternary mixture of 15% CO2, 5% 02 and 80% N-2). In order to examine the adsorbent regenerability, multiple CO2 adsorption/desorption cycles were also carried out. The surface area and micropore volume of the porous adsorbent were found to be 1910.17 m(2) g(-1) and 0.85 cm(3) g(-1), respectively. The CO2 adsorption profiles illustrate that the maximum CO2 capture on the sample was reached in less than 10 min. CO2 adsorption capacities up to 8.41 wt.% and 3.37 wt. % were achieved at 25 and 70 degrees C, respectively. Thermal swing regeneration studies showed that the prepared adsorbent has good cyclic regeneration capacities. (C) 2010 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)322-329
Number of pages8
JournalFuel Processing Technology
Volume92
Issue number3
DOIs
Publication statusPublished - Mar 2011

Keywords

  • Microporous carbon
  • KERATIN
  • HIGH-TEMPERATURE
  • FORMALDEHYDE
  • ADSORBENTS
  • CAPTURE
  • WASTE
  • CO2 capture
  • DIOXIDE
  • ACTIVATED CARBON
  • PYROLYSIS
  • ADSORPTION
  • Carpet waste

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