Inverse Temperature Hysteresis and Self-Sustained Oscillations in CO Oxidation over Pd at Elevated Pressures of Reaction Mixture: Experiment and Mathematical Modeling | Sciact - CRIS-система Института катализа

Inverse Temperature Hysteresis and Self-Sustained Oscillations in CO Oxidation over Pd at Elevated Pressures of Reaction Mixture: Experiment and Mathematical Modeling Научная публикация

Журнал

Chemical Engineering Science
ISSN: 0009-2509 , E-ISSN: 1873-4405

Вых. Данные

Год: 2020, Том: 212, Номер статьи : 115312, Страниц : 15 DOI: 10.1016/j.ces.2019.115312

Ключевые слова

Inverse hysteresis; Isothermal lumped model; Phase transition; Self-sustained oscillations; Surface oxide

Авторы

Lashina E.A. ^1,3 , Slavinskaya E.M. ^1,3 , Chumakova N.A. ^1,3 , Stadnichenko A.I. ^1,3 , Salanov A.N. ¹ , Chumakov G.A. ^2,3 , Boronin A.I. ^1,3

Организации

1	Boreskov Institute of Catalysis, 5 Acad. Lavrentiev ave., Novosibirsk, 630090, Russian Federation
2	Sobolev Institute of Mathematics, 4 Acad. Koptyug ave., Novosibirsk, 630090, Russian Federation
3	Novosibirsk State University, 2 Pirogova str., Novosibirsk, 630090, Russian Federation

Информация о финансировании (3)

1	Федеральное агентство научных организаций России	0303-2016-0003
2	Федеральное агентство научных организаций России	0303-2016-0017
3	Сибирское отделение Российской академии наук	I.1.5.3

Studying the kinetics of CO oxidation over Pd foil at elevated CO and O2 pressures, we observed an inverse hysteresis: CO conversion was much lower under sample cooling than under foil heating. It was established that under heating the oxidation of metallic palladium to bulk palladium oxide occurred through formation of the palladium surface oxide. Under cooling the bulk oxide reduced directly to metallic species, and in this case some self-sustained oscillations of reaction rate were observed. The catalytic scheme including main various oxygen states of the palladium surface and bulk with transitions between them under reaction conditions in heating/cooling catalytic cycle was proposed. On the base of this scheme the kinetic model of CO oxidation reaction was developed. Both most important mechanisms: Langmuir - Hinshelwood and Mars - van Krevelen, were involved for description of the observed kinetic nonlinear phenomena. The performed simulations demonstrated the capability of this model to describe well the inverse hysteresis of CO oxidation rate together with its oscillatory behavior at constant temperature within the hysteresis loop. © 2019 Elsevier Ltd

Lashina E.A. , Slavinskaya E.M. , Chumakova N.A. , Stadnichenko A.I. , Salanov A.N. , Chumakov G.A. , Boronin A.I.
Inverse Temperature Hysteresis and Self-Sustained Oscillations in CO Oxidation over Pd at Elevated Pressures of Reaction Mixture: Experiment and Mathematical Modeling
Chemical Engineering Science. 2020. V.212. 115312 :1-15. DOI: 10.1016/j.ces.2019.115312 WOS Scopus РИНЦ CAPlusCA OpenAlex

Поступила в редакцию:	19 июн. 2019 г.
Принята к публикации:	22 окт. 2019 г.
Опубликована online:	2 нояб. 2019 г.
Опубликована в печати:	2 февр. 2020 г.

Web of science:	WOS:000502034600009
Scopus:	2-s2.0-85074760620
РИНЦ:	41697733
Chemical Abstracts:	2019:2140422
Chemical Abstracts (print):	172:52143
OpenAlex:	W2988353568

БД	Цитирований
Scopus	12
Web of science	12
РИНЦ	13
OpenAlex	12