TITLE: Fischer-Tropsch Synthesis Catalysed by Cobalt-Rhodium and Cobalt-Ruthenium Carbonyl Clusters on Silica.

AUTHOR: J. Kiviaho.

INST.  AUTHOR: Valtion Teknillinen Tutkimuskeskus, Espoo (Finland). Chemical Technology.

SPONSOR: Technology Development Centre of Finland, Helsinki.*Neste Oy, Helsinki (Finland).*Kemira Oy, Helsinki (Finland).

LANGUAGE: English

PUB.  TYPE: Thesis

PUB.  COUNTRY: Finland

SOURCE: Foreign source - Finland [TFTISF], 15 Nov 96, 108p. ISBN: 951-38-4948-1

NTIS ORDER NO.: PB97-151039INW

ABSTRACT:

A systematic study was made of the use of tetranuclear CO4-nRunHn(CO)12 (n = 0-4), Co2Ru(CO)13 and Co4-nRhn(CO)12 (n= 0,1,2 or 4) clusters as catalyst precursors. Catalysts were characterized by temperature-programmed reduction and Fourier-transform infrared spectroscopy techniques, and their activity and selectivity in Fischer-Tropsch synthesis were determined, as well as the effect on their performance of reaction temperature, pretreatment atmosphere and method of preparation. Monometallic Co/4SiO2 and Ru4/SiO2 catalysts were very active and all rhodium-containing Co4-nRhn(CO)12/SiO2 catalysts were fairly weakly active in Fischer-Tropsch synthesis. Deactivation was associated with the bimetallic sites on cobalt-rhodium catalysts and with ruthenium on cobalt-ruthenium catalysts.

REPORT  NUMBER: VTT-PUBS-290

PROJECT  NUMBER: KET2415