The comparative analysis of operation results of two iron-molybdenum catalysts of foreign production F-1 and F-2 on an industrial large-capacity formaldehyde synthesis unit, consisting of two tubular reactors connected in series, was carried out. Variants of catalysts loading were presented and analysis of data on "hot spot" movement on the catalyst layer of the semi-annual period of reactors operation was carried out. The regularities of changes in the activity and selectivity of catalysts under consideration were examined at the beginning and end of the operation period.

Key words: methanol, formaldehyde, iron-molybdenum catalyst, activity, selectivity, tubular reactor

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