SOx Uptake and Release Properties of TiO2/Al2O3 and BaO/TiO2/Al2O3 Mixed Oxide Systems as NOx Storage Materials Full article
Journal |
Catalysis Today
ISSN: 0920-5861 , E-ISSN: 1873-4308 |
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Output data | Year: 2012, Volume: 184, Number: 1, Pages: 54-71 Pages count : 18 DOI: 10.1016/j.cattod.2011.12.006 | ||||
Tags | Al2O3, Anatase, BaO, Claus Process, DeNO x, HDS, LNT, NO x, NSR, SOx, Sulfation, Sulfur poisoning, TiO2 | ||||
Authors |
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Affiliations |
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Funding (4)
1 | Russian Foundation for Basic Research | 09-03-91225 |
2 | Russian Foundation for Basic Research | 10-03-00596 |
3 | Türkiye Bilimsel ve Teknolojik Araştırma Kurumu | 108M379 |
4 | Turkish Academy of Sciences |
Abstract:
Titania was used as a promoter to obtain novel materials in the form of TiO2/Al2O3 (Ti/Al) and BaO/TiO2/Al2O3 (Ba/Ti/Al, containing 8 wt% or 20 wt% BaO) that are relevant to NOx storage reduction (NSR) catalysis. Two different protocols (P1, P2) were utilized in the synthesis. Ti/Al(P1) manifests itself as crystallites of TiO2 on γ-Al2O3, while Ti/Al(P2) reveals an amorphous AlxTiyOz mixed oxide. The structures of the synthesized materials were investigated via TEM, EDX, BET analysis and XPS while the catalytic functionality/performance of these support materials upon SOx and subsequent NOx adsorption were investigated with TPD and in situ FTIR spectroscopy. Ti/Al(P1, P2) revealed a high affinity towards SOx. Overall thermal stabilities of the adsorbed SOx species and the total SOx uptake of the Ba-free samples increase in the following order: TiO2(anatase) ≪ γ-Al2O3 < Ti/Al(P1) < Ti/Al(P2). The superior SOx uptake of Ti/Al(P1, P2) support materials can be tentatively attributed to the increasing specific surface area upon TiO2 promotion and/or the changes in the surface acidity. Promotion of BaO/Al2O3 with TiO2 leads to the attenuation of the SOx uptake and a significant decrease in the thermal stability of the adsorbed SOx species. The relative SOx adsorption capacities of the investigated materials can be ranked as follows: 8Ba/Ti/Al(P1) < 8Ba/Ti/Al(P2) < 8Ba/Al ∼ 20Ba/Ti/Al(P1) < 20Ba/Al < 20Ba/Ti/Al(P2).
Cite:
Senturk G.S.
, Vovk E.I.
, Zaikovskii V.I.
, Say Z.
, Soylu A.M.
, Bukhtiyarov V.I.
, Ozensoy E.
SOx Uptake and Release Properties of TiO2/Al2O3 and BaO/TiO2/Al2O3 Mixed Oxide Systems as NOx Storage Materials
Catalysis Today. 2012. V.184. N1. P.54-71. DOI: 10.1016/j.cattod.2011.12.006 WOS Scopus РИНЦ
SOx Uptake and Release Properties of TiO2/Al2O3 and BaO/TiO2/Al2O3 Mixed Oxide Systems as NOx Storage Materials
Catalysis Today. 2012. V.184. N1. P.54-71. DOI: 10.1016/j.cattod.2011.12.006 WOS Scopus РИНЦ
Files:
Full text from publisher
Dates:
Submitted: | Sep 15, 2011 |
Accepted: | Dec 1, 2011 |
Published online: | Dec 30, 2011 |
Published print: | Apr 1, 2012 |
Identifiers:
Web of science | WOS:000303108100007 |
Scopus | 2-s2.0-84860261339 |
Elibrary | 24948560 |
Chemical Abstracts | 2012:613797 |
Chemical Abstracts (print) | 156:645664 |
OpenAlex | W2170986273 |