Extension of the true boiling point curve for national heavy petroleums through nolecular distillation process / Extensão da curva de ponto de ebulição verdadeiro para petroleos pesados nacionais atraves do processo de destilação molecular

AUTOR(ES)

Paula Sbaite Duarte dos Santos

DATA DE PUBLICAÇÃO

2005

RESUMO

Molecular Distillation is a separation process which explores high vacuum, operation at reduced temperatures and brief exposition of the material to the operating temperature. The term vacuum residue (heavy petroleum fractions) refers to the bottom of the vacuum distillation, which has an atmospheric equivalent temperature (AET) above 540°C. The determination of the True Boiling Point (TBP) curve is well established for petroleum fractions that reach the TBP up to 565°C by the American Society for Testing and MateriaIs (ASTM). Even so, for higher temperatures, these does not exist a standard methodology as yet. The objective of this work is to develop a new and more appropriated method to extend the TBP curve in order to use it for characterizing vacuum residue of heavy petroleum. Through falling film molecular distillator, experiments were carried-out using heavy fractions of Brazilian petroleum, where operating temperatures were increased systematically. The fractions obtained in each one of the pre-established temperatures were collected, quantified and characterized for both streams of the distillator. With a better characterization of the Brazilian petroleum, which is considered heavy, it will be possible to increase the operational yields in refineries, besides obtaining products of greater commercial interest. Regarding the results obtained, it is possible to extend the TBP curve through Molecular Distillation process with very good precision using the FRAMOL correlation developed. This is very important since it is possible to define better strategies and operating conditions for the petroleum processing representing a considerable progress in the analysis of heavy petroleum fractions. The developments achieved in this work are very important since no standard methodology is available for calculating the TBP extended curve and due to the large amount of heavy petroleum available currently

ASSUNTO(S)

petroleum residue destilação molecular distillation molecular petroleo - residuos

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