Abstract
Water-gas-shift (WGS) reaction is important for hydrogen production process and synthesis gas production process. In the industrial process, high-temperature-shift (HTS) reaction is carried out at 593-723 K using iron-chromium catalyst, and low-temperature-shift (LTS) reaction is carried out below 573 K using copper-zinc catalyst, respectively. There are some problems that the iron-chromium catalyst has low activity at low temperature, and the copper-zinc catalyst is deactivated by cyclic operation like as DSS. Recently we reported that the activity of Pd/Pt/LaCoO3 was higher than the activity of the copper-zinc catalyst and the catalyst did not require reductive pretreatment. The noble metal catalyst is comparatively stable, but the cost of the noble metal catalyst is higher than the iron-chromium catalyst and the copper-zinc catalyst. Therefore it is important to reduce the amount of noble metal.
The purpose of this study is to develop the novel catalyst for the WGS reaction in order to decrease the reaction temperature, and we examined the iron oxide catalyst and perovskite type oxide catalyst, expecting to improve the activity and the heat stability with redox properties.
