【摘要】 利用⁵⁷Fe穆斯堡尔谱、X射线衍射、X射线波长色散谱联合研究了Fe-Cr-K体系乙苯脱氢催化剂,结果表明,催化剂在使用过程中首先流失的K₂O可能负载于α-Fe₂O₃的表面;另一部分钾则以KFe₁₁O₁₇类似的物相存在;Cr则进入α-Fe₂O₃的晶格成为Fe的近邻。当Fe-Cr氧化物骨架解体时,KF₁₁O₁₇相也消失,导致催化剂完全失活。更多还原

【Abstract】 Ethylbenzene dehydrogenation iron catalysts were studied by ⁵⁷Fe Mossbauer spectroscopy, XRD and X-ray wavelenyth dispersion spectroscopy Results show catalyst deactivation can be correlated with the loss of K-Fe complex and with the breakdown of Fe-Cr oxide skeleton.更多还原