Mechanism and kinetics of ethanol oxidation over Ru(Pt) supported onto Mn-Cr-O mixed oxides

L. G. Pinaeva; E. M. Sadovskaya; E. A. Smal; A. S. Bobin; V. A. Sadykov

doi:10.1016/j.cej.2017.09.100

Mechanism and kinetics of ethanol oxidation over Ru(Pt) supported onto Mn-Cr-O mixed oxides

L. G. Pinaeva, E. M. Sadovskaya, E. A. Smal, A. S. Bobin, V. A. Sadykov

Результат исследования: Научные публикации в периодических изданиях › статья › рецензирование

4 Цитирования (Scopus)

Аннотация

Mn-Cr-O mixed oxide (SP) and 2%Pt/SP and 2%Ru/SP samples prepared by incipient wetness impregnation of SP with RuCl₃ or H₂PtCl₆ water solutions were tested in ethanol oxidation (ORE, 1.6%C₂H₅OH + 0.58%O₂ in He) and water gas shift (WGSR, 1.2%CO + 1.2%H₂O in He) reactions at 400 °C and 550 °C. At close ethanol conversion over all samples, 2%Ru/SP exhibited the highest selectivity towards CO and H₂ and the best activity in WGSR. Analysis of isotope responses during C₂H₅OH + ¹⁶O₂/C₂H₅OH + ¹⁸O₂ and C₂H₅OH + ¹⁶⁽¹⁸⁾O₂/¹⁶⁽¹⁸⁾O₂ switches revealed formation of both CO and CO₂ from the same intermediate – CH₃CHO. At this, oxygen in CO comes from CH₃CHO, while in CO₂ – from the catalyst. Final CO/CO₂ and H₂/H₂O ratios are determined by WGSR which obeys redox mechanism. It is faster reoxidation of Ruⁿ⁺ by H₂O (and probably, CO₂) that is responsible for highest yield of syngas products on 2%Ru/SP sample.

Язык оригинала	английский
Страницы (с-по)	101-110
Число страниц	10
Журнал	Chemical Engineering Journal
Том	333
DOI	https://doi.org/10.1016/j.cej.2017.09.100
Состояние	Опубликовано - 1 февр. 2018

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10.1016/j.cej.2017.09.100

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@article{db73633ef7294d908bb687398624725c,

title = "Mechanism and kinetics of ethanol oxidation over Ru(Pt) supported onto Mn-Cr-O mixed oxides",

abstract = "Mn-Cr-O mixed oxide (SP) and 2%Pt/SP and 2%Ru/SP samples prepared by incipient wetness impregnation of SP with RuCl3 or H2PtCl6 water solutions were tested in ethanol oxidation (ORE, 1.6%C2H5OH + 0.58%O2 in He) and water gas shift (WGSR, 1.2%CO + 1.2%H2O in He) reactions at 400 °C and 550 °C. At close ethanol conversion over all samples, 2%Ru/SP exhibited the highest selectivity towards CO and H2 and the best activity in WGSR. Analysis of isotope responses during C2H5OH + 16O2/C2H5OH + 18O2 and C2H5OH + 16(18)O2/16(18)O2 switches revealed formation of both CO and CO2 from the same intermediate – CH3CHO. At this, oxygen in CO comes from CH3CHO, while in CO2 – from the catalyst. Final CO/CO2 and H2/H2O ratios are determined by WGSR which obeys redox mechanism. It is faster reoxidation of Run+ by H2O (and probably, CO2) that is responsible for highest yield of syngas products on 2%Ru/SP sample.",

keywords = "18O SSITKA, Ethanol oxidation, Mechanism, Pt(Ru)/Mn-Cr-O, Syngas, HYDROGEN, ISOTOPIC-TRANSIENT KINETICS, GAS-SHIFT REACTION, RH, STEAM, CATALYSTS, METHANE FORMATION",

author = "Pinaeva, {L. G.} and Sadovskaya, {E. M.} and Smal, {E. A.} and Bobin, {A. S.} and Sadykov, {V. A.}",

year = "2018",

month = feb,

day = "1",

doi = "10.1016/j.cej.2017.09.100",

language = "English",

volume = "333",

pages = "101--110",

journal = "Chemical Engineering Journal",

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publisher = "Elsevier",

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Mechanism and kinetics of ethanol oxidation over Ru(Pt) supported onto Mn-Cr-O mixed oxides. / Pinaeva, L. G.; Sadovskaya, E. M.; Smal, E. A. и др.

В: Chemical Engineering Journal, Том 333, 01.02.2018, стр. 101-110.

Результат исследования: Научные публикации в периодических изданиях › статья › рецензирование

TY - JOUR

T1 - Mechanism and kinetics of ethanol oxidation over Ru(Pt) supported onto Mn-Cr-O mixed oxides

AU - Pinaeva, L. G.

AU - Sadovskaya, E. M.

AU - Smal, E. A.

AU - Bobin, A. S.

AU - Sadykov, V. A.

PY - 2018/2/1

Y1 - 2018/2/1

N2 - Mn-Cr-O mixed oxide (SP) and 2%Pt/SP and 2%Ru/SP samples prepared by incipient wetness impregnation of SP with RuCl3 or H2PtCl6 water solutions were tested in ethanol oxidation (ORE, 1.6%C2H5OH + 0.58%O2 in He) and water gas shift (WGSR, 1.2%CO + 1.2%H2O in He) reactions at 400 °C and 550 °C. At close ethanol conversion over all samples, 2%Ru/SP exhibited the highest selectivity towards CO and H2 and the best activity in WGSR. Analysis of isotope responses during C2H5OH + 16O2/C2H5OH + 18O2 and C2H5OH + 16(18)O2/16(18)O2 switches revealed formation of both CO and CO2 from the same intermediate – CH3CHO. At this, oxygen in CO comes from CH3CHO, while in CO2 – from the catalyst. Final CO/CO2 and H2/H2O ratios are determined by WGSR which obeys redox mechanism. It is faster reoxidation of Run+ by H2O (and probably, CO2) that is responsible for highest yield of syngas products on 2%Ru/SP sample.

AB - Mn-Cr-O mixed oxide (SP) and 2%Pt/SP and 2%Ru/SP samples prepared by incipient wetness impregnation of SP with RuCl3 or H2PtCl6 water solutions were tested in ethanol oxidation (ORE, 1.6%C2H5OH + 0.58%O2 in He) and water gas shift (WGSR, 1.2%CO + 1.2%H2O in He) reactions at 400 °C and 550 °C. At close ethanol conversion over all samples, 2%Ru/SP exhibited the highest selectivity towards CO and H2 and the best activity in WGSR. Analysis of isotope responses during C2H5OH + 16O2/C2H5OH + 18O2 and C2H5OH + 16(18)O2/16(18)O2 switches revealed formation of both CO and CO2 from the same intermediate – CH3CHO. At this, oxygen in CO comes from CH3CHO, while in CO2 – from the catalyst. Final CO/CO2 and H2/H2O ratios are determined by WGSR which obeys redox mechanism. It is faster reoxidation of Run+ by H2O (and probably, CO2) that is responsible for highest yield of syngas products on 2%Ru/SP sample.

KW - 18O SSITKA

KW - Ethanol oxidation

KW - Mechanism

KW - Pt(Ru)/Mn-Cr-O

KW - Syngas

KW - HYDROGEN

KW - ISOTOPIC-TRANSIENT KINETICS

KW - GAS-SHIFT REACTION

KW - RH

KW - STEAM

KW - CATALYSTS

KW - METHANE FORMATION

UR - http://www.scopus.com/inward/record.url?scp=85033567477&partnerID=8YFLogxK

U2 - 10.1016/j.cej.2017.09.100

DO - 10.1016/j.cej.2017.09.100

M3 - Article

AN - SCOPUS:85033567477

VL - 333

SP - 101

EP - 110

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

SN - 1385-8947

ER -