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    Improving fuel quality by whole crude oil hydrotreating: A kinetic model for hydrodeasphaltenization in a trickle bed reactor

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    Publication date
    2012
    Author
    Jarullah, Aysar Talib
    Mujtaba, Iqbal M.
    Wood, Alastair S.
    Keyword
    REF 2014: Hydrodeasphaltenization; Trickle-bed reactor; Three-phase heterogeneous model; Kinetic parameters; Simulation and optimization
    
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    Abstract
    Fossil fuel is still a predominant source of the global energy requirement. Hydrotreating of whole crude oil has the ability to increase the productivity of middle distillate fractions and improve the fuel quality by simultaneously reducing contaminants such as sulfur, nitrogen, vanadium, nickel and asphaltene to the levels required by the regulatory bodies. Hydrotreating is usually carried out in a trickle bed reactor (TBR) where hydrodesulfurization (HDS), hydrodenitrogenation (HDN), hydrodemetallization (HDM) and hydrodeasphaltenization (HDAs) reactions take place simultaneously. To develop a detailed and a validated TBR process model which can be used for design and optimization of the hydrotreating process, it is essential to develop kinetic models for each of these reactions. Most recently, the authors have developed kinetic models for all of these chemical reactions except that of HDAs. In this work, a kinetic model (in terms of kinetic parameters) for the HDAs reaction in the TBR is developed. A three phase TBR process model incorporating the HDAs reactions with unknown kinetic parameters is developed. Also, a series of experiments has been conducted in an isothermal TBR under different operating conditions affecting the removal of asphaltene. The unknown kinetic parameters are then obtained by applying a parameter estimation technique based on minimization of the sum of square errors (SSEs) between the experimental and predicted concentrations of asphaltene compound in the crude oil. The full model with the estimated kinetic parameters is then applied to evaluate the removal of asphaltene (thus affecting fuel quality) under different operating conditions (than those used in experiments).
    URI
    http://hdl.handle.net/10454/6034
    Citation
    Jarullah, A. T., Mujtaba, I. M., Wood, A. S. (2012) Improving fuel quality by whole crude oil hydrotreating: A kinetic model for hydrodeasphaltenization in a trickle bed reactor. Applied Energy, 94, 182-191.
    Link to publisher’s version
    http://dx.doi.org/10.1016/j.apenergy.2012.01.044
    Type
    Article
    Collections
    Engineering and Informatics Publications

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