Waste-derived activated carbons for control of nitrogen oxides

Amal S.S. Al-Rahbi, Chunfei Wu, Mohamad A. Nahil, Paul T. Williams

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Activated carbons were produced from waste and investigated for their efficiency for the removal of mono-nitrogen oxides (NOx) in simulated flue gases at a low temperature. The wastes used were waste biomass (date seeds), processed municipal solid waste in the form of refuse-derived fuel and waste tyres. The morphology, porous texture and surface chemistry of the prepared activated carbons were evaluated by scanning electron microscopy, energy-dispersive X-ray spectrometry, nitrogen adsorption and Boehm titration, and were compared with several commercial activated carbons. The carbons were then investigated in terms of their use in adsorbing NOx at a low temperature. The waste-derived activated carbons had NOx adsorption efficiencies at 50°C which were between 50 and 70% of those achieved for the commercial activated carbons. Increasing the adsorption temperature from 25 to 100°C significantly reduced nitrogen oxide (NO) adsorption. It was also shown that the NO adsorption efficiency depends on the porous structure, particularly the presence of micropores in the activated carbon, but to a lesser extent on the surface area of the carbons and acid-base surface groups on the carbon surface.

Original languageEnglish
Pages (from-to)30-41
Number of pages12
JournalProceedings of Institution of Civil Engineers: Waste and Resource Management
Volume169
Issue number1
DOIs
Publication statusPublished - 01 Feb 2016

Keywords

  • Environment
  • Pollution
  • Waste management & disposal

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Waste Management and Disposal

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