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

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

Type	Journal Article
Author	Tao Zhang
Author	Shi Jie Zhou
Author	Qiang Wei
Author	Ting Ting Liu
Author	Wen Wu Zhou
Author	Ya Song Zhou
URL	http://www.scientific.net/AMR.926-930.320
Volume	926-930
Pages	320-324
Publication	Advanced Materials Research
Date	5/2014
Abstract	Researchers conducted a 1000 hour hydrotreating experiment to study the hydrotreating behavior of heteroatom compounds and HDM catalyst deactivation using Venezuela De-Asphalted Oil. The effect of reaction severity on impurities removal was as expected: 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%. That of metal, on the other hand, 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 improved the stability of the HDM catalyst significantly.