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The Balance Between Reactivity and Stability of Modified Oxide Surfaces Illustrated by the Behavior of Sulfated Zirconia Catalysts

机译:硫酸化氧化锆催化剂行为改性氧化物表面反应性与稳定性的平衡

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摘要

The stability of a series of sulfated zirconia catalysts, promoted with up to 2 wt% iron or manganese, in their calcined state was investigated. Phase composition, nature of surface sulfate species, degree of hydroxylation, and butane isomerization activity changed during aging over months in various atmospheres and during milling. The metastability of small oxide particles is discussed, including literature data on alumina, titania and other oxides. Catalytically active fractions of a material easily transition into more stable, less active forms.
机译:研究了在煅烧状态下,以最多2 wt%的铁或锰促进的一系列硫酸化氧化锆催化剂的稳定性。相组成,表面硫酸盐种类的性质,羟基化程度和丁烷异构化活性在各种气氛下经过数月的老化以及在研磨过程中发生了变化。讨论了小氧化物颗粒的亚稳性,包括有关氧化铝,二氧化钛和其他氧化物的文献数据。材料的催化活性馏分易于转变为更稳定,活性较低的形式。

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