摘要
空气氧化湿法制备的ＭｎＦｅ２Ｏ４在Ｈ２还原下，生成氧缺位铁酸锰ＭｎＦｅ２Ｏ４－δ（０＜δ＜１），利用ＸＲＤ和Ｍｏｓｓｂａｕｅｒ谱等技术，对它的性质（还原性，晶格常数稳定性）进行了详细地研究，考查了在氧缺位铁酸锰（ＭｎＦｅ２Ｏ４－δ，δ＞１）及ＭｎＯ－ＦｅＯ固溶体下ＣＯ２分解成Ｃ的活性，结果表明（ＭｎＦｅ２Ｏ４－δ，δ＞１）能够有效地分解ＣＯ２成Ｃ，并且在反应以后自身转变成了化学计量的ＭｎＦｅ２Ｏ４，ＭｎＯ－ＦｅＯ分解ＣＯ２以后，一部分变为ＭｎＦｅ２Ｏ４。
The oxygen deficient manganous ferrite was obtained through using H 2 reduced MnFe 2O 4 preparation of hydrothermal air oxidation method and its properties (including reducing property,lattice constants stability) were studied in detail by utilizing XRD and Mssbauer spectra.The activity of CO 2 decomposing into C with oxygen deficient manganous ferrite (MnFe 2O 4-δ ,δ>0) and the solid solution MnO FeO were investigated, and its results indicated that MnFe 2O 4-δ (δ>0) was able to efficiently decompose CO 2 into C and after reaction it converted itself into stoichiometric MnFe 2O 4, after the solid solution MnO FeO having decomposed CO 2 into C,a part of MnO FeO became MnFe 2O 4, and the other part still remained in solid solution structure.
关键词
铁酸锰
氧缺位
稳定性
炭
催化剂
二氧化碳还原
dccomposition of CO 2
manganous ferrite
oxygen deficiency
stability, carbon
MnO FeO
