Selective fixed-bed fischer-tropsch synthesis with high surface area Cu and K promoted, iron/manganese spinels
 Pelletized, high surface area, Cu and Group IA or IIA dual metal promoted Mn-Fe spinels which are reduced and operated in a fixed-bed reactor provide exceptionally high catalytic activity and selectivity in the conversion of CO/H.sub.2 to high molecular weight hydrocarbons. These copper and Group IA or IIA metal promoted iron-manganese catalysts maintain good activity and selectivity to C.sub.5 + hydrocarbons, and give low selectivity to CO2. 
Exxon Research and Engineering Company
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Enrique Rocco A. Stuart L. Joseph E.
Iglesia Fiato Soled Baumgartner