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Comparative Study on Hydrotreating of Venezuela De-Asphalted Oil: Conversion Behavior of Heteroatom Compounds and HDM Catalyst Deactivation

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Abstract:

A 1000 hour hydrotreating experiment was performed to investigate the hydrotreating behavior of heteroatom compounds (first stage) and HDM catalyst deactivation (second stage) using Venezuela De-Asphalted Oil. The effect of reaction severity on impurities removal was the expected one, the deeper the hydrotreating degree, the higher the conversion of impurities. The Characterization of spent HDM catalyst shows that the content of coke deposition on spent HDM catalyst is only 4 wt% while that of metal is more than 30 wt%. Vanadium compounds in DAO with less diffusion resistance can deposit inside of the HDM catalyst grain. Lower coke formation also retard the HDM catalyst by keeping the diffusion pores and active cites. The removal of asphaltenes largely improved the stability of the HDM catalyst.

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Periodical:

Advanced Materials Research (Volumes 926-930)

Pages:

320-324

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.926-930.320

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Online since:

May 2014

Authors:

Tao Zhang*, Shi Jie Zhou, Qiang Wei, Ting Ting Liu, Wen Wu Zhou, Ya Song Zhou

Keywords:

DAO, Deactivation, Hydrotreating, Metal Deposition

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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