Abstract
This article presents a novel study of the role of the catalyst support towards the formation of active cobalt sites for N2O conversion reactions within a temperature range of 300-600°C. These reactions were examined in a fixed bed tubular reactor. ZSM-5 (Si/Al≤15), TS-1, and amorphous silicates were used as catalyst supports for cobalt loadings. All catalysts were prepared by following standard methods and recipes. In general, cobalt loading on supports was varied between 0.78 and 5.40wt.-% (as determined from inductively coupled plasma (ICP) analysis). ICP, temperature programmed desorption, X-ray diffraction, and N2 adsorption/desorption isotherms were used for the characterization of prepared catalysts. Cobalt on ZSM-5 support generates weak and strong acid sites. Furthermore, for the Co-ZSM-5 catalyst, prepared by a wet deposition method, the N2O decomposition reaction is first order with an activation energy of ∼132kJmol-1. Co2+ and Co3+ are the suggested active species for the N2O conversions in the studied range of temperatures.
| Original language | English |
|---|---|
| Pages (from-to) | 1138-1145 |
| Number of pages | 8 |
| Journal | Australian Journal of Chemistry |
| Volume | 70 |
| Issue number | 10 |
| Early online date | 24 Aug 2017 |
| DOIs | |
| Publication status | Published - Oct 2017 |
| Externally published | Yes |
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Cobalt Species Active for Nitrous Oxide (N2O) Decomposition within a Temperature Range of 300-600°C. / Khan, Naseer A.; Kennedy, Eric M.; Dlugogorski, Bogdan Z.; Adesina, Adesoji A.; Stockenhuber, Michael.
In: Australian Journal of Chemistry, Vol. 70, No. 10, 10.2017, p. 1138-1145.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - Cobalt Species Active for Nitrous Oxide (N2O) Decomposition within a Temperature Range of 300-600°C
AU - Khan, Naseer A.
AU - Kennedy, Eric M.
AU - Dlugogorski, Bogdan Z.
AU - Adesina, Adesoji A.
AU - Stockenhuber, Michael
PY - 2017/10
Y1 - 2017/10
N2 - This article presents a novel study of the role of the catalyst support towards the formation of active cobalt sites for N2O conversion reactions within a temperature range of 300-600°C. These reactions were examined in a fixed bed tubular reactor. ZSM-5 (Si/Al≤15), TS-1, and amorphous silicates were used as catalyst supports for cobalt loadings. All catalysts were prepared by following standard methods and recipes. In general, cobalt loading on supports was varied between 0.78 and 5.40wt.-% (as determined from inductively coupled plasma (ICP) analysis). ICP, temperature programmed desorption, X-ray diffraction, and N2 adsorption/desorption isotherms were used for the characterization of prepared catalysts. Cobalt on ZSM-5 support generates weak and strong acid sites. Furthermore, for the Co-ZSM-5 catalyst, prepared by a wet deposition method, the N2O decomposition reaction is first order with an activation energy of ∼132kJmol-1. Co2+ and Co3+ are the suggested active species for the N2O conversions in the studied range of temperatures.
AB - This article presents a novel study of the role of the catalyst support towards the formation of active cobalt sites for N2O conversion reactions within a temperature range of 300-600°C. These reactions were examined in a fixed bed tubular reactor. ZSM-5 (Si/Al≤15), TS-1, and amorphous silicates were used as catalyst supports for cobalt loadings. All catalysts were prepared by following standard methods and recipes. In general, cobalt loading on supports was varied between 0.78 and 5.40wt.-% (as determined from inductively coupled plasma (ICP) analysis). ICP, temperature programmed desorption, X-ray diffraction, and N2 adsorption/desorption isotherms were used for the characterization of prepared catalysts. Cobalt on ZSM-5 support generates weak and strong acid sites. Furthermore, for the Co-ZSM-5 catalyst, prepared by a wet deposition method, the N2O decomposition reaction is first order with an activation energy of ∼132kJmol-1. Co2+ and Co3+ are the suggested active species for the N2O conversions in the studied range of temperatures.
UR - http://www.scopus.com/inward/record.url?scp=85030321492&partnerID=8YFLogxK
U2 - 10.1071/CH17172
DO - 10.1071/CH17172
M3 - Article
VL - 70
SP - 1138
EP - 1145
JO - Australian Journal of Chemistry
JF - Australian Journal of Chemistry
SN - 0004-9425
IS - 10
ER -