Effect of Preparation Mode on the Properties of Mn-Na-W/SiO2 Catalysts for Oxidative Coupling of Methane: Conventional Methods vs. POSS Nanotechnology | Sciact - CRIS-система Института катализа

Effect of Preparation Mode on the Properties of Mn-Na-W/SiO2 Catalysts for Oxidative Coupling of Methane: Conventional Methods vs. POSS Nanotechnology Научная публикация

Журнал

Eurasian Chemico-Technological Journal
ISSN: 1562-3920

Вых. Данные

Год: 2016, Том: 18, Номер: 2, Страницы: 93-110 Страниц : 18 DOI: 10.18321/ectj430

Ключевые слова

Mn-Na-W/ SiO2 catalysts, Oxidative coupling of methane, Preparation methods

Авторы

Ismagilov I.Z. ¹ , Matus E.V. ¹ , Kuznetsov V.V. ¹ , Kerzhentsev M.A. ¹ , Yashnik S.A. ¹ , Larina T.V. ¹ , Prosvirin I.P. ¹ , Navarro R.M. ² , Fierro G.J. ² , Gerritsen G. ³ , Abbenhuis H.C. ³ , Ismagilov Z.R. ^1,4

Организации

1	Boreskov Institute of Catalysis SB RAS, pr. Akademika Lavrentieva, 5, 630090, Novosibirsk, Russia
2	Instituto de Catálisis y Petroleoquímica, CSIC, Marie Curie 2, 28049, Madrid, Spain
3	Hybrid Catalysis B.V., Den Dolech 2, Eindhoven 5612, AZ, the Netherlands
4	Institute of Coal Chemistry and Material Science SB RAS, pr. Sovetskiy, 18, 650000, Kemerovo, Russia

Информация о финансировании (2)

1	Федеральное агентство научных организаций России	V.45.1.10.
2	European Commission	262840 FP7-NMP-2010-LARGE-4 DEMCAMER

Using XPS, BET, XRD, TG-DTA, HRTEM-EDX, TPR and UV-Vis Diffuse Reflectance spectroscopic methods the electronic, redox and structural properties of Mn-Na-W/SiO2 catalysts prepared by the incipient wetness impregnation method and mixture slurry method were studied in detail. Since POSS nanotechnology (POSS = polyhedral oligomeric silsesquioxanes) has attracted attention as tooling for synthesis of catalysts with novel properties and functionalities, we expanded this method for the preparation of Mn-Na-W/SiO2 catalyst. The physicochemical and catalytic properties of Mn-Na-W/SiO2 catalysts prepared by conventional methods and POSS nanotechnology were examined comparatively. In all studied Mn-Na-W/SiO2 catalysts both individual oxides (MnOx, WO3) and bimetal oxide phases (Na2WO4, MnWO4) are found in addition to oxide particles of high dispersion. The UV-Vis Diffuse Reflectance indicates that Na+ cations facilitates stabilization of octahedrally coordinated Mn3+Oh cations in the isolated state, while Mn3+Oh promote the disordering of W6+ cations in the supported system. The Mn-Na-W/SiO2 prepared using metal-POSS precursors marks out presence of unglobular SiO2 particles, higher dispersion of MnOx and MnWO4 particles and more easily reducible metal-oxide species. The catalysts prepared by incipient impregnation method and mixture slurry method have practically similar catalytic performance while the catalyst prepared by POSS nanotechnology method shows lower activity and selectivity. At 800‒850 °C the increase of C2 hydrocarbons yield from 4 to 15% and the rise of molar ratio С2Н4/C2H6 from 0.2 to 1 are observed when impregnation or mixture slurry method are used for catalyst preparation instead of POSS nanotechnology method.

Ismagilov I.Z. , Matus E.V. , Kuznetsov V.V. , Kerzhentsev M.A. , Yashnik S.A. , Larina T.V. , Prosvirin I.P. , Navarro R.M. , Fierro G.J. , Gerritsen G. , Abbenhuis H.C. , Ismagilov Z.R.
Effect of Preparation Mode on the Properties of Mn-Na-W/SiO2 Catalysts for Oxidative Coupling of Methane: Conventional Methods vs. POSS Nanotechnology

Eurasian Chemico-Technological Journal. 2016. V.18. N2. P.93-110. DOI: 10.18321/ectj430 WOS Scopus РИНЦ CAPlus OpenAlex

Полный текст от издателя

Поступила в редакцию:	18 окт. 2015 г.
Принята к публикации:	12 мар. 2016 г.
Опубликована в печати:	25 мая 2016 г.
Опубликована online:	30 нояб. 2016 г.

Web of science:	WOS:000391003400002
Scopus:	2-s2.0-85019163434
РИНЦ:	30020135
Chemical Abstracts:	2018:1027253
OpenAlex:	W2579093453

БД	Цитирований
Web of science	16
Scopus	15
РИНЦ	17
OpenAlex	17