研究論文
改質ガス中のCO選択除去触媒の開発
2001 年 26 巻 1 号 p. 23-26
詳細
2001 年 26 巻 1 号 p. 23-26
Methanol and hydrocarbon fuels are the candidates of hydrogen source for PEFCs. However the reformed H2 gas contains CO formed by reverse Shift-reaction and the PEFC electrode reaction is poisoned by the small amount of CO. Au/TiO2 and Au/AlO3 catalysts have been studied for CO selective oxidation in the reformed gas, but the CO selectivity is not enough. Therefore, to promote CO selective oxidation, the effects of Se additive and supporting materials have been investigated. The catalysts were immersed in aqueous SeO2 in order to get Se additive. The activity of CO oxidation in H2,C0,02 (2:2:1) mixture gas was examined at 0℃ .Characteristic of Se added Au/TiO2 was analyzed by XAFS (X-ray Absorption Fine Structure). Addition of Se (Se/Au=2~3%) promoted CO selectivity in such mixture gas. TiO2 supported catalysts have higher CO selectivity than Al2O3 supported catalysts.
