CATEGORY: HYDROTREATING
Korean Journal of Chemical Engineering, November
2013, Volume 30, Issue 11, pp 1985-1989
Effects
of aromatic cycle oils on performance of residue hydrotreating
Yongjun Liu, Yu Zou
College of Chemical Engineering, Huaqiao University, Jimei 668, Xiamen, 361021,
Fujian, P. R. China
Abstract
Hydrotreating is an important pretreatment process in residue catalytic
cracking. It is used to eliminate metals, S and N contaminants and to partially
process asphaltene from streams so that the products can be efficiently
processed in downstream conversion units.
Authors
studied the effects of aromatic additives on residue hydrotreating (RHT) by
adding various types and contents of high aromatic cycle oils into atmosphere
residue (AR). The aromatic additives modify the colloidal structure of
asphaltene in AR and improve the liberation of heteroatomic compounds bound in
the nucleus. As a result, the amount of carbon residue in blending oils
decreases and the removal efficiency of Ni, V, S and N increases obviously.
The conversion increase is greater for nitrogen than for sulfur, and
hydrodevanadium reveals a distinct advantage over hydrodenickel. However,
excessive amount of light cycle oil is not helpful for removing the Ni and V
since some metalloporphyrins bond with the superstructure of nucleus.
Full Text Source (Subscription or Fee): http://link.springer.com/article/10.1007/s11814-013-0157-x#
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