TITLE: Investigation of Kinetics and Reaction Engineering for Fischer-Tropics Synthesis of 1-Alkenes (C Sub 4 -C sub 20 )

AUTHOR: J. Gaube;   G. Hochstadt;   B. Schliebs;   G. Sudheimer.

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],  Aug 82,  125p.

ABSTRACT:

1-alkenes are primary products of the Fischer-Tropsch Synthesis.  Consecutive reactions as isomerization to 2- and 3-alkenes and hydrogenation to alkanes cause a reduction of 1-alkene-selectivity. In order to calculate the selectivity of the synthesis the kinetics of main and consecutive reactions have been studied. The reaction rates are expressed as functions of the concentration of 1-alkenes, hydrogen and carbon monoxide. Then the 1-alkene-selectivity can be described as a function of H sub 2 :CO ratio, pressure, flow rate of synthesis gas and C-number of compounds for the fixed-bed and the slurry reactor. Main and consecutive reactions as well as transport processes have been taken into account. The comparison of both reactors shows that the slurry reactor has some advantages. A process flow sheet with the essential characteristic of productseparation out of circulating fuel of the slurry reactor has been proposed. Precipitated iron catalysts containing K sub 2 CO sub 3 are most suitable for synthesis of 1-alkenes with C-numbers between 4 and 20. For some catalysts of different preparation methods and different addition of K sub 2 CO sub 3 C-number-distributions of reaction products are given.  (ERA citation 08:004550)

REPORT  NUMBER: BMFT-FB-T-82-148