fulltext.study @t Gmail

Influence of the support on the catalytic performance of Mo, CoMo, and NiMo catalysts supported on Al2O3 and TiO2 during the HDS of thiophene, dibenzothiophene, or 4,6-dimethyldibenzothiophene

Paper ID Volume ID Publish Year Pages File Format Full-Text
53556 46974 2016 10 PDF Available
Title
Influence of the support on the catalytic performance of Mo, CoMo, and NiMo catalysts supported on Al2O3 and TiO2 during the HDS of thiophene, dibenzothiophene, or 4,6-dimethyldibenzothiophene
Abstract

•TiO2 increases the hydrogenation activity of MoS2.•TiO2 induces fewer defects in oxidic Mo and poor promotion of MoS2.•DDS/HYD selectivity is strongly influenced by the catalyst support.•MoS2 on titania is not as effectively promoted as MoS2/Al2O3.•Activity of hydrogenation sites in MoS2/TiO2 is weakly sensitive to promotion.

The activity and promoter effect of Co and Ni for MoS2/Al2O3 and MoS2/TiO2 catalysts during the hydrodesulfurization of three sulfur containing molecules (thiophene, DBT and 4,6-DMDBT) that are transformed with different contributions of the direct desulfurization (DDS) or hydrogenation (HYD) reaction pathways was investigated. The results show that the greater activity displayed by Mo/TiO2 comes from a moderate increase in the direct desulfurization capability but mostly from the increase in the hydrogenating character due to the stronger MoS2 metallic character induced by TiO2. Therefore, the HDS selectivity is strongly influenced by the support. MoS2 supported on TiO2 is not as effectively promoted by Co or Ni as MoS2 supported on alumina, because it presents fewer defects and mostly exposes the Mo-edge, which is difficult to promote. The promoter incorporation benefits mainly the direct desulfurization route and the activity of the hydrogenation sites in MoS2/TiO2 is only weakly sensitive to the promotion.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (178 K)Download as PowerPoint slide

Keywords
Hydrodesulfurization; HDS selectivity; Thiophene; DBT; 4,6-DMDBT; Support effect
First Page Preview
Influence of the support on the catalytic performance of Mo, CoMo, and NiMo catalysts supported on Al2O3 and TiO2 during the HDS of thiophene, dibenzothiophene, or 4,6-dimethyldibenzothiophene
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 - Volume 259, Part 1, 1 January 2016, Pages 140–149
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