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International Journal of Chemical Reactor Engineering

Ed. by de Lasa, Hugo / Xu, Charles Chunbao

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IMPACT FACTOR 2016: 0.623
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CiteScore 2016: 0.58

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1542-6580
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Comparison of Lumping Approaches to Predict the Product Yield in a Dual Bed VGO Hydrocracker

Sepehr Sadighi / Arshad Ahmad / Mansoor Shirvani
Published Online: 2012-02-03 | DOI: https://doi.org/10.1515/1542-6580.2519

In this research, to predict the product yields of a pilot scale VGO hydrocracking reactor charged with mono functional hydrotreating and hydrocracking catalysts, two different four-lump models are developed. The first one, called combined bed model, is a simplex in which there is no boundary between hydrotreating and hydrocracking reactions through the reactor. The second one, called dual bed model, is a rigorous model in which hydrogen consumption and hydrotreating reactions are included. In this way, the reactor is subdivided into two different layers, so the effect of hydrotreating reactions on the hydrocracking section can be considered. Results show that the absolute average deviation (AAD%) of the yield prediction for the combined bed and the dual bed models are 8.23 percent and 5.87 percent, respectively. The main reason for the lower average deviation of the dual bed model is its higher accuracy to predict the yield of gas which is also the major advantage of this approach. However, the simplicity of the combined bed model can make it more applicable and attractive, especially when hydrogen consumption as well as sulfur, nitrogen and aromatic specifications of the feed and products are not accessible.

Keywords: hydrotreating; hydrocracking; lump kinetic model; hydrogen consumption; dual bed hydrocracking reactor

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Published Online: 2012-02-03


Citation Information: International Journal of Chemical Reactor Engineering, ISSN (Online) 1542-6580, DOI: https://doi.org/10.1515/1542-6580.2519.

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©2012 Walter de Gruyter GmbH & Co. KG, Berlin/Boston. Copyright Clearance Center

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