Improving steam-reforming performance by nanopowdering CuCrO2

Te Wei Chiu, Ruei Teng Hong, Bing Sheng Yu, Yung Han Huang, Satoshi Kameoka, An Pang Tsai

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

In this study, the delafossite type CuCrO2 nanopowder was used as a precursor for preparing Cu-based catalyst for steam reforming of methanol (SRM). The efficiency of hydrogen generation was greatly improved by reducing the size of CuCrO2 to nanoscale. The reduction temperature of Cu metal particles from CuCrO2 decreased from 600 °C to 200 °C due to this size effect. Additionally, because of lowered activation energy, CuCrO2 nanopowder could be reduced by methanol vapor. Thus the CuCrO2 nanopowder, prepared by GNP method, had much higher SRM efficiency than bulk CuCrO2 and the commercial SRM catalyst, even without H2 activation process. The SEM images revealed that the powder retained a cotton candy-like porous structure after reduction treatment. The TEM images showed that the Cu particles were about 5 nm in diameter and well dispersed on Cr2O3 after the reduction of CuCrO 2 nanopowder at 500 °C. The catalyst was evaluated by the generation rate with steam reforming of methanol, and the peak hydrogen generation rate read as high as 2550 ml/min g-cat at 360 °C with hydrogen activation. CuCrO2 nanopowder showed high catalytic activity even without reduction treatment, and hydrogen generation rate read as high as 1740 ml/min g-cat at 360 °C.

Original languageEnglish
Pages (from-to)14222-14226
Number of pages5
JournalInternational Journal of Hydrogen Energy
Volume39
Issue number26
DOIs
Publication statusPublished - 2014 Sep 3

Keywords

  • Cu-based catalyst
  • Hydrogen generation
  • Steam reforming

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Improving steam-reforming performance by nanopowdering CuCrO<sub>2</sub>'. Together they form a unique fingerprint.

Cite this