Next Article in Journal
Hydrogenation of Phenol over Pt/CNTs: The Effects of Pt Loading and Reaction Solvents
Next Article in Special Issue
Methanol Steam Reforming: Na Doping of Pt/YSZ Provides Fine Tuning of Selectivity
Previous Article in Journal
Preparation of Salen–Metal Complexes (Metal = Co or Ni) Intercalated ZnCr-LDHs and Their Photocatalytic Degradation of Rhodamine B
Article Menu
Issue 5 (May) cover image

Export Article

Open AccessArticle
Catalysts 2017, 7(5), 144; doi:10.3390/catal7050144

Catalysts Promoted with Niobium Oxide for Air Pollution Abatement

1
Earth and Environmental Engineering Department, Columbia University, New York, NY 10027, USA
2
Chemical Engineering Department, Columbia University, New York, NY 10027, USA
3
Chemical Engineering for Energy and the Environment Department, KTH Royal Institute of Technology, 10044 Stockholm, Sweden
*
Author to whom correspondence should be addressed.
Academic Editor: Morris D. Argyle
Received: 31 March 2017 / Revised: 1 May 2017 / Accepted: 4 May 2017 / Published: 8 May 2017
View Full-Text   |   Download PDF [2873 KB, uploaded 8 May 2017]   |  

Abstract

Pt-containing catalysts are currently used commercially to catalyze the conversion of carbon monoxide (CO) and hydrocarbon (HC) pollutants from stationary chemical and petroleum plants. It is well known that Pt-containing catalysts are expensive and have limited availability. The goal of this research is to find alternative and less expensive catalysts to replace Pt for these applications. This study found that niobium oxide (Nb2O5), as a carrier or support for certain transition metal oxides, promotes oxidation activity while maintaining stability, making them candidates as alternatives to Pt. The present work reports that the orthorhombic structure of niobium oxide (formed at 800 °C in air) promotes Co3O4 toward the oxidation of both CO and propane, which are common pollutants in volatile organic compound (VOC) applications. This was a surprising result since this structure of Nb2O5 has a very low surface area (about 2 m2/g) relative to the more traditional Al2O3 support, with a surface area of 150 m2/g. The results reported demonstrate that 1% Co3O4/Nb2O5 has comparable fresh and aged catalytic activity to 1% Pt/γ-Al2O3 and 1% Pt/Nb2O5. Furthermore, 6% Co3O4/Nb2O5 outperforms 1% Pt/Al2O3 in both catalytic activity and thermal stability. These results suggest a strong interaction between niobium oxide and the active component—cobalt oxide—likely by inducing an oxygen defect structure with oxygen vacancies leading to enhanced activity toward the oxidation of CO and propane. View Full-Text
Keywords: cobalt on Nb2O5 catalyst; CO and propane oxidation; promoting effects of Nb2O5 cobalt on Nb2O5 catalyst; CO and propane oxidation; promoting effects of Nb2O5
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Xiang, W.; Han, X.; Astorsdotter, J.; Farrauto, R. Catalysts Promoted with Niobium Oxide for Air Pollution Abatement. Catalysts 2017, 7, 144.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Catalysts EISSN 2073-4344 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top