一氧化碳中温变换催化剂的研究

STUDY OF FERRITE-TYPE CO SHIFT CATALYST

铁氧体是用铁氧体法处理含铬电镀废水的沉渣,它含有与一氧化碳中温变换铁铬催化剂相类似的组成.一氧化碳中温变换铁铬催化剂是国内需要量极大的一种合成氨生产用催化剂.利用铁氧体为原料制备中温变换催化剂,不但消除污染,而且变废为利,确有实际意义.本文在前一工作的基础上报导由铁氧体为原料制备的一氧化碳中温变换催化剂.

The ferrite-type catalyst was found to have good activitty. The X-ray diffraction andMossbauer spectroscopy measurements show that the active structure of the catalyst is non-stoichiometric magnetite:FeA^(3+)[Fe_(1-3δ^(2+))Fe_(1 +2δ^(3+)□_δ]_BO_4The structure formed after substituting Cr^(3+) for Fe^(3+) seems to be an iron-chromium spinel-like mixed oxide:FeA^(3+)[Fe_(1-x^(3+))Fe^(2+)Cr_x^(3+)]_BO_4