VALORISATION DES ASPHALTES PAR HYDROGENATION A TRES HAUTE SEVERITE SUR CATALYSEUR ENTRAINE
The research set out to use the CERCHAR plant for the hydroliquefaction of coal to study the potential of processing asphalts by hydrogenation to produce lighter or less viscous products and so contribute to the petroleum industry's increasing need for medium and light distillates. Preliminary work included adapting the plant to handle loads more viscous and richer in sulphur than normal, lowering the viscosity level of the charge and choosing appropriate catalysts at laboratory level to encourage desulphurization, demetallization and conversion into light fractions. Four hydrogenation tests were then carried out at variable ? temperature above 400 degrees C and under a pressure of 150-200 bars with highly divided catalyst in suspension demonstrated an intense demetallization as well as high conversion rate with lower coke formation. This proves the rapid saturation of radicals resulting from cracking reactions when catalysts are active. Carbonaceous particles encourage conversion at low temperature but with lower liquid output, and aid the filtration of insolubles. Further tests would be necessary before the process can become commercially applicable.
Références bibliographiques: EUR 9080 FR (1984) MF, 41 P., BFR 120, BLOW-UP COPY BFR 205, EUROFFICE, LUXEMBOURG, POB 1003
Disponibilité: Can be ordered online
Numéro d'enregistrement: 1989124091200 / Dernière mise à jour le: 1987-01-01
Langues disponibles: fr