Effects of gasification temperature and catalyst ratio on hydrogen production from catalytic steam pyrolysis-gasification of polypropylene

Chunfei Wu, Paul T. Williams*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)

Abstract

A two-stage reaction system was used for the pyrolysis-gasification of polypropylene in the presence of stearn and a Ni/CeO2/ Al2O3 catalyst. The influence of catalyst ratio 0, 0.25, 0.5, 1.0, and 2.0 and gasification temperature 600, 700, 800, and 900 °C) on the production of hydrogen were investigated. The reacted catalysts were characterized using thermogravimetric analysis and scanning electron microscopy-energy dispersive X-ray spectrometry. The maximum potential hydrogen production was only 5 wt % without the catalyst, however it increased to 52.8 wt % in the presence of the Ni/CeO2 /Al2O3 catalyst at a catalyst/ polypropylene ration of 1. Increasing the catalyst:polypropylene ratio resulted in an increase in hydrogen production and a decrease of coke deposited on the catalyst surface but showed little influence on the CO and CO2 concentrations. Increasing the gasification temperature resulted in a marked increase in potential hydrogen production from 13.4 to 52.0 wt %, as the gasification temperature was increased from 600 to 900 °C. In addition, the CO concentration increased from 9.3 to 27.2 vol %, and CO2 concentration decreased from 17.8 to 4.5 vol % with increasing gasification temperature.

Original languageEnglish
Pages (from-to)4125-4132
Number of pages8
JournalEnergy and Fuels
Volume22
Issue number6
DOIs
Publication statusPublished - 01 Nov 2008
Externally publishedYes

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology

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