Since it was patented by Bosch and Wild at 1914, the Fe/Cr-based mixed oxide catalyst has been used for water-gas shift reactions (WGSRs). Until the present, this catalyst has been used as the primary catalyst for industrial high-temperature shift (HTS) reactions. However, because environmental concerns about chromium elements were raised in the early 1980s, the replacement of chromium in HTS catalysts has been intensely studied by many groups. These studies have contributed notable insights into HTS catalysis using Fe-based oxides, especially about the reaction mechanism and functions of promoter elements. In some cases, the potential of using a substituent metal previously neglected because of properties inferior to those of chromium was rediscovered after noteworthy improvements were produced by combining it with other metals in promoting the Fe-oxide catalyst. This paper reviews the recent studies of Cr-free Fe-based HTS catalysts, especially focusing on the roles and functions of the non-chromium promoters in the catalysts.
Bibliographical noteFunding Information:
Dr. Dae-Won Lee is supported by a Korea University grant.
This work was supported from GTL-FPSO project (KIST, 2M29760) funded by the Korean government, Ministry of Knowledge Economy (Project number: MKE2011T100200023) and Industries (DSME, KOGAS, JNK Heaters, Hy-lok Korea).
This work was supported by the Human Resources Development of the Korea Institute of Energy Technology Evaluation and Planning ( 20114010203050 ) grant funded by the Korea government Ministry of Knowledge Economy .
- Fe/Cr catalysts: Cr-free catalysts
- High-temperature shift
- Water-gas shift reaction
ASJC Scopus subject areas
- General Chemistry