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SOx Uptake and Release Properties of TiO2/Al2O3 and BaO/TiO2/Al2O3 Mixed Oxide Systems as NOx Storage Materials Научная публикация

Журнал Catalysis Today
ISSN: 0920-5861 , E-ISSN: 1873-4308
Вых. Данные Год: 2012, Том: 184, Номер: 1, Страницы: 54-71 Страниц : 18 DOI: 10.1016/j.cattod.2011.12.006
Ключевые слова Al2O3, Anatase, BaO, Claus Process, DeNO x, HDS, LNT, NO x, NSR, SOx, Sulfation, Sulfur poisoning, TiO2
Авторы Senturk Goksu S. 1 , Vovk Evgeny I. 1,2 , Zaikovskii Vladimir I. 2 , Say Zafer 1 , Soylu Asli M. 1 , Bukhtiyarov Valerii I. 2 , Ozensoy Emrah 1
Организации
1 Chemistry Department, Bilkent University, 06800 Bilkent, Ankara, Turkey
2 Boreskov Institute of Catalysis, 630090 Novosibirsk, Russian Federation

Информация о финансировании (4)

1 Российский фонд фундаментальных исследований 09-03-91225
2 Российский фонд фундаментальных исследований 10-03-00596
3 Scientific and Technological Research Council of Turkey 108M379
4 Türkiye Bilimler Akademisi

Реферат: 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).
Библиографическая ссылка: 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 CAPlusCA OpenAlex
Файлы: Полный текст от издателя
Даты:
Поступила в редакцию: 15 сент. 2011 г.
Принята к публикации: 1 дек. 2011 г.
Опубликована online: 30 дек. 2011 г.
Опубликована в печати: 1 апр. 2012 г.
Идентификаторы БД:
Web of science: WOS:000303108100007
Scopus: 2-s2.0-84860261339
РИНЦ: 24948560
Chemical Abstracts: 2012:613797
Chemical Abstracts (print): 156:645664
OpenAlex: W2170986273
Цитирование в БД:
БД Цитирований
Web of science 26
Scopus 27
РИНЦ 26
OpenAlex 27
Альметрики: