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From the experimental results individually provided on the upgrading of crudes, some general considerations of the visbreaking process and correlations between feedstock features on the one hand, and product yield and characteristics on the other, have been developed. The detailed analytical inspection carried out on the residue, before and after thermal treatment, showed that dealkylation, "splitting" and condensation are the main reaction pathways occurring in thermal processes. The particular behaviour of the different crudes in the visbreaking process is explained on the basis of the above mechanisms. It is possible to correlate the kinetic parameters (kinetic constant and activation energy) and the product selectivity with the crude features. Finally , a forecasting model has been developed to determine the visbroken residue stability on the basis of the chemico-physical characteristics (aromatic carbon or H/C ratio) of asphaltenes and malthenes present in the visbreaking feedstock.

Additional information

Authors: SANDRIN R, Euron SpA (AGIP Petroli), San Donato Milanese (IT);DI CARLO S, Euron SpA (AGIP Petroli), San Donato Milanese (IT);BALDIRAGHI F, Euron SpA (AGIP Petroli), San Donato Milanese (IT);CAVALLINI M, ERG SpA, Genova (IT);FERRANDO A, ERG SpA, Genova (IT);RAMELLA P, ERG SpA, Genova (IT);DISPINZIERI F, SELM Società Energia Montedison SpA, Milano (IT);POZZI R, SELM Società Energia Montedison SpA, Milano (IT)
Bibliographic Reference: EUR 13074 EN (1990) 51 pp., MF, ECU 4
Availability: (2)
Record Number: 199011540 / Last updated on: 1994-12-02
Original language: en
Available languages: en
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