fulltext.study @t Gmail

Hydrotreating of crude 2-ethylhexanol over Ni/Al2O3 catalysts: Surface Ni species-catalytic activity correlation

Paper ID Volume ID Publish Year Pages File Format Full-Text
42504 45928 2009 8 PDF Available
Title
Hydrotreating of crude 2-ethylhexanol over Ni/Al2O3 catalysts: Surface Ni species-catalytic activity correlation
Abstract

A series of supported Ni/γ-Al2O3 samples were prepared and then used to identify the surface Ni species. The samples were characterized by ICP-AES, XRD, TPR, and XPS. The results indicated that two types of Ni species occurred on the samples with Ni loading < 9.1 wt%, while four types of Ni species occurred on the samples with Ni loading > 9.1 wt%. The reduction temperatures around 350, 500–520, 620–650, and 750–800 °C corresponding to Ni species were related to amorphous NiO, crystal NiO, NiAl2O4, and NiAlxOy (x > 2), respectively. A correlation was made between the catalytic activities and the surface Ni species. For the catalysts that were difficult to reduce (Ni loading < 9.1 wt%), the activities were very poor at low reduction temperatures; for the easily reducible catalysts (Ni loading > 9.1 wt%), the activities were excellent in a wider reduction temperature range from 400 to 800 °C.

Graphical abstractTwo Ni species occur on the sample with Ni loading < 9.1 wt%, while four Ni species occur on the sample with Ni loading > 9.1 wt%. Peaks at 350, 500–520, 620–650, and 750–800 °C are attributed to amorphous NiO, crystal NiO, NiAl2O4, and NiAlxOy (x > 2), respectively.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Ni/γ-Al2O3; Ni species; Reducibility; Hydrotreating; 2-Ethylhexanol
First Page Preview
Hydrotreating of crude 2-ethylhexanol over Ni/Al2O3 catalysts: Surface Ni species-catalytic activity correlation
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: Applied Catalysis A: General - Volume 368, Issues 1–2, 31 October 2009, Pages 105–112
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