Hydrogen generation from hydrolysis of activated Al-Bi, Al-Sn powders prepared by gas atomization method

Yuheng Liu, Xingjun Liu, Xinren Chen, Shuiyuan Yang, Cuiping Wang

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)

Abstract

Highly activated Al-based composite powders with compositions of Al-20Bi and Al-20Sn (wt.%) were prepared by gas atomization method for hydrogen generation. The Al-20Bi powders formed incomplete core–shell structure with Bi aggregating on the powder surface, while the Al-20Sn powders presented eutectic structure with Sn distributed homogeneously on the grain boundaries of Al. The hydrolysis characteristics of these powders were investigated in distilled water. The results showed that the Al-20Bi and Al-20Sn powders exhibited high hydrolysis performance and violently reacted with distilled water at 30 °C. Elevated temperature could significantly shorten the incubation time, as well as improve hydrogen generation rate and conversion yield of the powders. The hydrolysis mechanism and oxidation resistance property of the powders were carefully investigated too. The miscibility gap and the large difference of linear thermal expansion coefficient between Al and Bi are responsible for the activation and high oxidation resistance of the Al-20Bi powders.

Original languageEnglish
Pages (from-to)10943-10951
Number of pages9
JournalInternational Journal of Hydrogen Energy
Volume42
Issue number16
DOIs
Publication statusPublished - 2017 Apr 20
Externally publishedYes

Keywords

  • Al-based powders
  • Gas atomization
  • Hydrogen generation
  • Hydrolysis reaction

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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