High yield hydrogen from the pyrolysis-catalytic gasification of waste tyres with a nickel/dolomite catalyst

FUEL

卷:106

Article

Elbaba, Ibrahim F.¹  Williams, Paul T.¹ 

[1] Univ Leeds, Energy Res Inst, Leeds LS2 9JT, W Yorkshire, England

关键词: Hydrogen;    Catalyst;    Pyrolysis;    Gasification;    Tyre;   

DOI  :  10.1016/j.fuel.2012.12.067

来源: Elsevier

【 摘 要 】

Nickel/dolomite catalysts have been prepared and investigated for their suitability for the production of hydrogen from the two-stage pyrolysis-gasification of waste tyres. Experiments were conducted at a pyrolysis temperature of 500 degrees C and gasification temperature was kept constant at 800 degrees C with a catalyst/waste tyres ratio of 0.5. Fresh and reacted catalysts were characterised using a variety of methods, including, BET, X-ray diffraction (XRD), thermogravimetric analysis (TGA) and scanning electron microscopy (SEM)-energy dispersive X-ray spectrometry (EDXS). The results indicated that the gas yield was significantly increased from 30.3 to 49.1 wt.% and the potential H-2 production was doubled with the introduction of 5% Ni into the calcined dolomite catalyst. The results show also a further increase in the gas yield and the potential H-2 production with increasing Ni loading from 5 to 20 wt.%. The coke deposited on the catalyst surface was 3.1, 0.9, 2.8 and 3.7 wt.%, when the Ni loading was 0, 5, 10 and 20 wt.% for the calcined dolomite catalyst, respectively. The results showed that the calcined Ni dolomite catalysts became deactivated by filamentous carbons. (C) 2013 Elsevier Ltd. All rights reserved.

【 授权许可】

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