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通过ＸＲＤ，ＢＥＴ和ＸＰＳ表征及反应性能测定表明，铁系高变催化剂中加入的过渡元素能够进入Ｆｅ３Ｏ４晶格形成固溶体，并使催化剂的晶胞参数随着加入元素离子半径的增大而增大，晶粒度明显变小，比表面积增大，起到铬的作用，催化剂的活性和热稳定性提高．发现部分过渡元素具有富集ＯＨ－的特性，使催化剂在较低的汽／气比条件下具有较高的催化活性．研制成功的Ｂ１２１型无铬高变催化剂性能达到铁铬系高变催化剂的技术指标．
The results of XRD, BET and XPS characterization and reaction performance show that the transition elements added into the Fe-based hyper-changeable catalyst can enter the Fe3O4 lattice to form solid solution and increase the unit cell parameters of the catalyst with the increase of the ionic radius , Grain size was significantly smaller, specific surface area increased, played the role of chromium, the catalyst activity and thermal stability increased. Some of the transition elements were found to have OH- -enriched characteristics, which made the catalyst have higher catalytic activity at lower vapor / gas ratio. The successful development of the B121 chromium-free high-performance catalyst to achieve high-chromium iron chromium catalyst for the technical indicators.