Generation of hydrogen from polyvinyl chloride by milling and heating with CaO and Ni(OH)2

William Tongamp, Qiwu Zhang, Miyagi Shoko, Fumio Saito

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)


This work discusses an alternative process option for the treatment of polyvinyl chloride (PVC) by producing hydrogen (H2) gas, at the same time fixing chlorine for proper environmental control. In the first-stage, a milling operation is performed in a planetary ball mill to obtain a mixture of PVC sample with CaO and Ni(OH)2 to be used as feed in the second-step, involving heating of the milled product. Analyses by thermogravimetry-mass spectroscopy (TG-MS) and gas chromatography (GC) showed H2, CH4, CO and CO2 as main constituents. The results clearly show that addition of Ni(OH)2 to provide nickel as catalyst and CaO as adsorbent to fix CO2 and HCl gases generated during heating, assisted in clean H2 generation with concentration near 90% at temperatures between 450 and 550 °C. Analyses of solids after heating by X-ray diffraction and TG-DTA techniques showed both CaOHCl and CaCO3 as main phases in the product. This process could be developed to treat PVC wastes together with other polymers and/or plastic wastes for production of H2 gas.

Original languageEnglish
Pages (from-to)1002-1006
Number of pages5
JournalJournal of Hazardous Materials
Issue number1-3
Publication statusPublished - 2009 Aug 15


  • Heating
  • Hydrogen gas
  • Milling
  • Planetary mill
  • Plastic wastes
  • Polyvinyl chloride

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis


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