Improvement of thermal cracking procedures for residues by optimisation of the transformation of resins and asphaltenes
In all the thermal processes treating residues for refining purposes, the main problem to be faced relates to the polycondensation of high molecular weight molecules such as resins and asphaltenes. These side reactions provide low-value by-products (pitches and coke), impair the stability of the wanted products, limit the conversion of the residues, induce many difficulties in the process design and operation and consequently have to be prevented or at least carefully controlled. As a result of these considerations, the project is devoted to the performance improvement of thermal processes such as hydrovisbreaking of residues. The research work has been carried out in three main phases: (i) a laboratory scale study (batch reactor) of the behaviour of the hydrogen-donor or radical-promotor compounds in the thermal treatment of residues, (ii) pilot-plant tests (dynamic conditions) dealing with hydrovisbreaking of residues in the presence of model additives or industrial cuts, (iii) characterisation of the liquid products obtained in the first two phases.
Bibliographic Reference: EUR 13988 FR (1991) 173 pp., MF, ECU 8
Record Number: 199210104 / Last updated on: 1994-12-02
Original language: fr
Available languages: fr