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| Author(s): |
Viktor Oswaldo Cárdenas Concha
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | Campinas, SP. |
| Institution: | Universidade Estadual de Campinas (UNICAMP). Faculdade de Engenharia Química |
| Defense date: | 2010-07-12 |
| Examining board members: |
Rubens Maciel Filho;
Paula Sbaite;
Wagner dos Santos Oliveira;
Gilvan Anderson Gadioli Fischer;
José Carlos Rodrigues
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| Advisor: | Maria Regina Wolf Maciel; Rubens Maciel Filho |
| Abstract | |
Nowadays, Brazil has a great demand for asphalt due to the reconstruction and construction of the new roads. The investment in technology to guarantee this demand is necessary in the qualitative and quantitative aspects. This work has as general aim the study in pilot scale of the supercritical deasphalting process using heavy and ultra heavy residues produced from conventional and molecular distillation. The work intends the replacement of the liquid liquid extraction process used for deasphalting in laboratory, aiming to introduce operational gain, such as processing time reduction and the increase of the material quantity obtained, that is to say, the process optimization. A computational modeling of the supercritical deasphalting process was done and it was validated with experimental data. The effect of the thermodynamics and operational properties of the process was studied with the aim to obtain operational gain. Furthermore, the supercritical and near critical extraction of the asphaltenes and resins were studied, experiments were carried out in the equipment and the data were obtained in the supercritical separation unit. The mapping of the regions of the process optimal operation using experimental design united with mathematical model was realized. The comparation of the results obtained in supercritical deasphalting unit with the results obtained with the conventional process (liquid liquid extraction) in CENPES Valoration Laboratory were done to conclude this work (AU) | |