Abstract
In this chapter, waste tyre was used as a raw material for the production of activated carbons through pyrolysis. Tyre char (TC) and two tyre derived activated carbons (TAC1 and TAC2) were produced. The TAC1 was activated at 950oC for 4 hr in 85% CO2 and 15% N2 atmosphere while TAC2 was firstly treated with 3M HCl for 18 hr and then pyrolysed at 950oC in steam generated by heating water at 0.45mL/min and 150mL/min of N2 for 4hr. The tyre char and tyre derived activated carbon were characterised with regard to their physical and chemical properties. The adsorption of acid (Acid Blue 25) and basic (Methylene Blue) dyes in aqueous solution were studied. Equilibrium data were fitted to various adsorption isotherms including Langmuir, Freundlich, Redlich-Peterson and Langmuir-Freundlich. It was found that the adsorption capacity of MB was higher than of AB25 for all the adsorbents prepared from tyre. It also showed that the adsorption capacity increased after higher temperature activation and more significantly after acid demineralization treatment. This was due to the fact that tyre char was practically a nonporous material, with a higher temperature treatment, a mesoporous structure was developed. With acid demineralisation, activated carbon with a higher micro- and mesoporosity and an increase in the surface area was further developed.
| Original language | English |
|---|---|
| Title of host publication | Water Production and Wastewater Treatment |
| Publisher | Nova Science Publishers, Inc. |
| Pages | 101-115 |
| Number of pages | 15 |
| ISBN (Print) | 9781617285035 |
| Publication status | Published - Jan 2011 |
| Externally published | Yes |