The physico-chemical structure and activity of hydrodesulphurization catalysts aged by accelerated method

•The long term activity of HDS catalysts based on CoMo and NiW was measured.•The accelerated deactivation versus industrial deactivation was compared.•The kinetic parameters of deactivation procedure were calculated.•Physic-chemical properties of HDS catalysts were evaluated.•The methodology for acc...

Full description

Saved in:
Bibliographic Details
Published in:Catalysis today 2015-11, Vol.256, p.261-268
Main Authors: Zbuzek, M., Vráblík, A., Tukač, V., Veselý, M., Prokešová, A., Černý, R.
Format: Article
Language:English
Subjects:
Accelerated method
Activity
Aging
Hydrodesulphurization catalyst
Structure
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•The long term activity of HDS catalysts based on CoMo and NiW was measured.•The accelerated deactivation versus industrial deactivation was compared.•The kinetic parameters of deactivation procedure were calculated.•Physic-chemical properties of HDS catalysts were evaluated.•The methodology for accelerated determination of long term activity was introduced. The research was focused on the verification of the accelerated testing method for the testing of long term catalytic activity. The verification was carried out with two types (CoMo/Al2O3 and NiW/Al2O3) of commercial HDS catalysts. The catalysts were also placed into the industrial reactor and allowed to run for approximately 16 months under the industrial conditions. Then the residual activity of the catalysts was determined. The results from the accelerated and the industrial deactivation were compared. The accelerated method included (i) the testing of the initial activity and (ii) the determination of decreasing rate of activity. The deactivation step was implemented by the injection of highly aromatic raw materials with a coking tendency. After the deactivation period the typical conditions were set (pressure 4.5MPa, hydrogen flow 300Nm3/m3, and WHSV 1.0kg/dm3cat). Subsequently, the reaction temperature for sulfur level 10ppmw was determined. The implementation of accelerated method was assessed by evaluation of physical and chemical composition of the aged catalysts. The effect of coking and active phase changes on the deactivation was also described. Raman spectroscopy and SEM-EDS analyses were realized for characterization of coke deposited in the aged catalysts.
ISSN:0920-5861
1873-4308
DOI:10.1016/j.cattod.2014.12.040