fulltext.study @t Gmail

Optimal pretreatment conditions for Co–Mo hydrotreatment catalysts prepared using ethylenediamine as a chelating agent

Paper ID Volume ID Publish Year Pages File Format Full-Text
54414 47008 2014 10 PDF Available
Title
Optimal pretreatment conditions for Co–Mo hydrotreatment catalysts prepared using ethylenediamine as a chelating agent
Abstract

•Co–Mo catalysts prepared using bimetallic complexes containing EDA were studied.•Sulfided catalysts previously dried at 120–300 °C contain products of ligand decomposition.•Presence of carbon in hydrotreating catalysts increases HDS activity.•Nitrogen in the composition of sulfided catalysts inhibits HDS activity.•Optimal pretreatment temperature for Co–Mo catalysts prepared using EDA is 400 °C.

Co–Mo/Al2O3 catalysts were prepared using bimetallic complexes consisting of ethylenediamine and polybasic carboxylic acid ligands coordinated to cobalt and molybdenum, respectively. The structures of the complex compounds remained unchanged upon initial adsorption to alumina. However, the chemical composition, morphology of the Co–Mo–S phase and thiophene hydrogenolysis activity of the catalysts were dependent on the pretreatment temperature before sulphidation. Nitrogen, a product of ligand decomposition, significantly inhibited catalytic activity. To attain the maximum thiophene hydrogenolysis activity, a 400 °C pretreatment was necessary. At this temperature, most of the nitrogen was removed, but the formation of Co and Mo compounds, which transform into low activity compounds during sulphidation, was not observed.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (205 K)Download as PowerPoint slide

Keywords
Pretreatment temperature; Ethylenediamine; Hydrotreating catalyst; Chelating agent
First Page Preview
Optimal pretreatment conditions for Co–Mo hydrotreatment catalysts prepared using ethylenediamine as a chelating agent
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volumes 220–222, March 2014, Pages 327–336
Authors
, , , , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us