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|Type:||Artigo de periódico|
|Title:||High-boiling-point Petroleum Fractions Upgrading Using The Centrifugal Reactive-molecular Distillation Process Over Catalyst: Mathematical Modeling And Simulation Including Experimental Validation|
|Abstract:||The modeling of the reactive molecular distillation process (centrifugal type), in which the molecular distillation process and reactive process occur simultaneously to upgrade heavy petroleum crude oil, is presented in this work. The mathematical model involves equations for the evaluation of the physicochemical properties, in-situ cracking reaction, heat, continuity and material balances. A case study is illustrated for an atmospheric petroleum residue (>673.15 K) of " W" crude oil. The influence of adding a catalyst (3 and 5 wt%) was examined under different operating conditions: the process temperature range was from 473.15 K to 523.15 K (considering a pressure between 40 - 50 Pa) and the constant feed flow rate was 1.473 kg h -1. The results showed that the concentration of the pseudocomponent " a" shrank in both the s- and r- directions reaching an extent conversion of the feedstock about 50% with 3 and 5 wt% of catalyst. Due to the rapid temperature rise in the thin liquid film, the thickness of the film rapidly decreased in this region, whereas the amount of distillate from the split molecules continuously increased throughout the evaporator under the selected conditions. The experimental results agreed well with those obtained from the theoretical simulations, indicating the accuracy and reliability of the mathematical model, since the average percent error was no larger than 6.82%, 9.39% and 14.92% for the distillate flow rate and the extent of conversion in the distillate and in the residue stream, respectively. © 2012 Elsevier B.V.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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