Highly efficient hydrolysis of magnetic milled powder from waste aluminum (Al) cans with low-concentrated alkaline solution for hydrogen generation

Hangqi Yang, Honglei Zhang, Ruichao Peng, Shanshan Zhang, Xiurong Huang, Zengdian Zhao

Research output: Journal PublicationArticlepeer-review

20 Citations (Scopus)

Abstract

Currently, recycling waste aluminum materials are of significant importance for reducing environmental pollution and improving economic efficiency. In this paper, aluminum (Al) powder prepared from waste Al cans with magnetic grinding method was directly used in hydrolysis for hydrogen generation. The prepared waste Al cans powder was characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET), atomic absorption spectrophotometer (AAS), and density analysis. The results showed that grinding time, NaOH concentration, and reaction temperature affected the hydrolysis rate and hydrogen yield markedly; 1 g of Al cans powder with grinding time of 40 minutes could produce 1296-mL hydrogen within 6 minutes under the optimal reaction conditions. The reaction kinetics study demonstrated that the hydrolysis of Al cans powder is kinetically controlled while hydrolysis of Al cans flakes is diffusively controlled. The hydrolysis mechanism was also predicted based on the experimental results and kinetic study. The generation of hydrogen from hydrolysis of waste Al cans powder with low-concentrated alkaline solution is a promising way to diminish environmental pollution and instrument corrosion.

Original languageEnglish
Pages (from-to)4797-4806
Number of pages10
JournalInternational Journal of Energy Research
Volume43
Issue number9
DOIs
Publication statusPublished - Jul 2019
Externally publishedYes

Keywords

  • alkaline solution
  • aluminum cans
  • hydrogen
  • hydrolysis
  • kinetics

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology

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