Sulfuric acid decomposition on Pt/SiC-coated-alumina catalysts for SI cycle hydrogen production

Seoung Young Lee, Heon Jung, Won Joo Kim, Yong Gun Shul, Kwang Deog Jung

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19 Citations (Scopus)

Abstract

Sulfuric acid decomposition was conducted at atmospheric pressure and a GHSV of 72,000 mL/gcat h in the temperature ranges from 650 to 850 °C. The Pt-Al (1wt% Pt/Al2O3) and and Pt-SiC-Al (1wt% Pt/SiC-coated-Al2O3) catalysts were prepared by an impregnation method. The Pt-Al catalyst rapidly deactivated at 650 and 700 °C, but was stable at 750 and 850 °C. The aluminum sulfate was observed on the spent Pt-Al catalyst by an FT-IR, an X-ray spectroscopy and a TGA/DSC analyzer, which was suggested to be a cause of the deactivation at lower reaction temperature. The alumina support was coated with SiC by a CVD method with methyltrichlorosilane (MTS) to get a non-corrosive support (SiC-Al) with high surface areas. The thermal analysis of the spent Pt-SiC-Al showed that the aluminum sulfate formation was suppressed during the sulfuric acid decomposition. The Pt-SiC-Al catalyst was not only active higher than the Pt-Al catalyst, but was also stable at all the tested reaction temperature.

Original languageEnglish
Pages (from-to)6205-6209
Number of pages5
JournalInternational Journal of Hydrogen Energy
Volume38
Issue number14
DOIs
Publication statusPublished - 2013 May 10

Bibliographical note

Funding Information:
The authors wish to acknowledge the financial support from MEST of Korea and KAERI. This work has been carried out under the Nuclear Hydrogen Development and Demonstration Project (NHDD).

All Science Journal Classification (ASJC) codes

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

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