Abstract: Steam/CO2 reforming of methane was studied at 600–900 °C, molar ratio CO2/H2O 0–2 and contact time 0.04–0.15 s over impregnated Ni/CeO2 catalysts of various compositions. It has been established that with an increase in the Ni content from 2 to 10 wt.%, both the conversion of reactants (X) and the yield of products (Y) increase in the range XCH4 25→80%, XCO2 35→72%, YH2 30→80%, YCO 30→75% (at 750 °C). With a further increase in the nickel content to 15%, the process parameters changed slightly, reaching a plateau. Higher nickel content (10 vs. 2 wt.%) ensures stable operation of the catalyst over time. The functional performance of the catalysts was correlated with physicochemical properties of as-synthesized, activated and spent samples using X-ray fluorescence analysis, low-temperature nitrogen adsorption, X-ray diffraction analysis, electron microscopy, and thermal analysis. It was shown that the Ni content affects the thermal stability, the textural, structural and redox characteristics of the samples. The 10% Ni/CeO2 catalyst was chosen as the optimal one due to higher H2 productivity, and sufficient resistance to sintering and coking. This sample provides a stable hydrogen yield of 85% in steam/CO2 reforming of methane at 800 °C, CO2/H2O = 2 and a contact time 0.15 s.

Cite: Matus Е.V. , Sukhova O.B. , Ismagilov I.Z. , Ushakov V.A. , Yashnik S.A. , Kerzhentsev M.A. , Ismagilov Z.R.
Steam/CO2 Reforming of Methane Over Impregnated Ni/CeO2 Catalysts: Effect of Sample Composition on Their Activity and Stability
Eurasian Chemico-Technological Journal. 2022. V.24. N3. P.191-202. DOI: 10.18321/ectj1432 WOS Scopus РИНЦ AN OpenAlex

Dates:

Submitted:	Feb 7, 2022
Accepted:	May 4, 2022
Published print:	Oct 10, 2022

Identifiers:

Web of science:	WOS:000932874900001
Scopus:	2-s2.0-85141391896
Elibrary:	50065151
Chemical Abstracts:	2023:2151032
OpenAlex:	W4308879917

Citing:

DB	Citing
Scopus	3
Elibrary	2
Web of science	3
OpenAlex	3

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