Production of hydrogen by steam gasification of dehydrochlorinated poly(vinyl chloride) or activated carbon in the presence of various alkali compounds

Tohru Kamo, Kanji Takaoka, Junichiro Otomo, Hiroshi Takahashi

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Steam gasification of dehydrochlorinated poly(vinyl chloride) (PVC) or activated carbon was carried out in the presence of various alkali compounds at 3.0∈MPa and 560°C-660°C in a batch reactor or in a semi-batch reactor with a flow of nitrogen and steam. Hydrogen and sodium carbonate were the main products and methane and carbon dioxide were the minor products. Yields of hydrogen were high in the presence of sodium hydroxide and potassium hydroxide. The acceleration effect of the alkali compounds on the gasification reaction was as follows: KOH > NaOH > Ca(OH)2 > Na 2CO3. The rate of gasification increased with increasing partial steam pressure and NaOH/C molar ratio. However the rate became saturated at a molar ratio of NaOH/C greater than 2.0.

Original languageEnglish
Pages (from-to)109-115
Number of pages7
JournalJournal of Material Cycles and Waste Management
Volume8
Issue number2
DOIs
Publication statusPublished - 2006 Sep
Externally publishedYes

Keywords

  • Alkali compounds
  • Hydrogen
  • PVC
  • Sodium hydroxide
  • Steam
  • Waste

ASJC Scopus subject areas

  • Waste Management and Disposal
  • Mechanics of Materials

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