TITLE: Catalysts and Relations of Selectivity for the Fischer-Tropsch-Synthesis.

AUTHOR: H. Schulz.

INST.  AUTHOR: Bundesministerium fuer Forschung und Technologie, Bonn-Bad Godesberg (Germany, F.R.).

LANGUAGE: German

PUB.  TYPE: Technical Report

PUB.  COUNTRY: Germany Federal Republic

SOURCE: Department of Energy [DEE],  1980,  129p.

NOTES: In German.

ABSTRACT:

The chemical system of the Fischer-Tropsch-CO-Hydrogenation is characterized by a multiplicity of interconnected reactions. Various possibilities exist for shifting the selectivity of the process towards particular directions by means of varying the catalyst properties as well as the reaction conditions. As a basis for desired alterations of product selectivity the interrelations of selectivity in the Fischer-Tropsch system with cobalt and with iron catalysts are described as a function of temperature, synthesis gas composition, pressure, residence time and type of the process. An important role in this connection has to be attributed to analytical methods for determining product composition and to the characteristics of product selectivity (product distribution to fractions of same carbon number, methane formation, olefin portion of the hydrocarbons, olefin isomerization, skelatal isomerization, formation of alcohols). New interrelations and limitations of selectivity are evaluated in detail. The synthesis has been performed in fixed bed integral and differential type reactors. Additional experiments of propanol decomposition have been made for characterization of the catalysts.  Methods of capillary gas chromatography, partly in combination with precolumns, have been developed. The results given in this report are regarded as to be of scientific value. They also offer a theoretical background for the proposed application of the Fischer-Tropsch synthesis for the production of industrial organic chemicals and other products.  (ERA citation 08:022915)

REPORT  NUMBER: BMFT-FB-T-80-124