NEW SULFIDE CATALYSTS FOR THE HYDROLIQUEFACTION OF COAL
The aim of the research is to develop new carbon supported sulfide catalysts having a higher activity and/or larger lifetime than the alumina supported catalysts currently applied and attention has been given to the structure and hydrodesulfurization activity of these catalysts. For carbon black composite, carbon covered alumina, and micropore blocked activated carbon the influence of various carbon carrier oxidative treatments on the activity of the supported sulfide phase has been studied. For the characterization of the structure of the active (Mo) sulfide phase deposited on an (activated) carbon carrier a combination of dynamic oxygen chemisorption, thiophene hydrodesulfurization and X-ray photoelectron spectroscopy measurements was applied. Dynamic oxygen chemisorption measurements showed that the molybdenum sulfide phase supported on active carbon had a high density of only one type of active site with a high turnover frequency. The alumina supported molybdenum phase had a lower active site density and different types of sites seemed to be present at low and high molybdenum concentration. For both the Mo/C and Mo/gamma-Al-2O-3 catalysts, the decline in activity with run time was not reproduced by the oxygen chemisorption capacities.
Bibliographic Reference: EUR 10034 EN (1985) MF, 36 P., BFR 150, BLOW-UP COPY BFR 200, EUROFFICE, LUXEMBOURG, POB 1003
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Record Number: 1989125013400 / Last updated on: 1987-02-01
Available languages: en