Influence of mixed molten carbonate composition on hydrogen formation by steam gasification

Tohru Kamo, Beili Wu, Yuriko Egami, Hajime Yasuda, Hideki Nakagome

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Steam gasification in the presence of carbonate compounds is an effective method to recover useful materials from electronic waste streams by converting plastics into gaseous products that can be used for energy production and avoiding the expensive manual disassembly process. We investigated steam gasification of activated carbon in the presence of various mixtures of lithium carbonate, sodium carbonate, and potassium carbonate. The activated carbon was almost completely converted into hydrogen and carbon dioxide at 700°C under 0. 1 MPa pressure in the presence of carbonate mixtures. Carbon dioxide was also derived from partial decomposition of lithium carbonate. Steam gasification was accelerated in the presence of various carbonate mixtures and at increasing steam partial pressures. These experimental results show that fluidity of carbonates, the potassium content of the carbonate, and the steam partial pressure are important factors in accelerating steam gasification.

Original languageEnglish
Pages (from-to)50-55
Number of pages6
JournalJournal of Material Cycles and Waste Management
Volume13
Issue number1
DOIs
Publication statusPublished - 2011 Mar
Externally publishedYes

Keywords

  • Activated carbon
  • Carbonate
  • Hydrogen
  • Molten carbonates
  • Steam gasification

ASJC Scopus subject areas

  • Waste Management and Disposal
  • Mechanics of Materials

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