Abstract: Hydrogen production through autothermal reforming of methane (ATR of CH4) over promoted Ni catalysts was studied. The control of the ability to self-activation and activity of Ni-M/Ce0.5Zr0.5O2/Al2O3 catalysts was achieved by tuning their reducibility through the application of different types (M = Pt, Pd, Re, Mo or Sn) and content (molar ratio M/Ni = 0.003, 0.01 or 0.03) of additive. The comparison of the efficiency and action mode of noble (M = Pt, Pd) and non-noble (M = Re, Mo, Sn) metal additives in the composition of Ni-M/Ce0.5Zr0.5O2/Al2O3 catalysts was performed using X-ray fluorescence analysis, N2 adsorption, X-ray diffraction, high-resolution transmission electron microscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, temperature-programmed reduction with hydrogen, and thermal analysis. The composition-characteristics-activity correlations were determined. It was shown that the introduction of a promoter does not affect the textural and structural properties of catalysts but influences their reducibility and performance in ATR of CH4. At the similar dispersion of NiO active component (11 ± 2 nm), the Ni2+ reduction is intensified in the following order of additives: Mo < Sn < Re ≤ Pd < Pt. It was found that for the activation of Ni and Ni–Sn catalysts before ATR of CH4 tests, the pre-reduction is required. On the contrary, the introduction of Pt, Pd and Re additives leads to the self-activation of catalysts under the reaction conditions and an increase of the H2 yield due to the enhanced reducibility of Ni2+. The efficient and stable catalyst for hydrogen production has been developed: in ATR of CH4 at 850 °C over an optimum 10Ni-0.9Re/Ce0.5Zr0.5O2/Al2O3 catalyst the H2 yield of 70% is attained. The designed catalyst has enhanced stability against oxidation and sintering of Ni active component as well as high resistance to coking.

Cite: Matus E.V. , Ismagilov I.Z. , Yashnik S.A. , Ushakov V.A. , Prosvirin I.P. , Kerzhentsev M.A. , Ismagilov Z.R.
Hydrogen Production through Autothermal Reforming of CH4: Efficiency and Action Mode of Noble (M = Pt, Pd) and non-Noble (M = Re, Mo, Sn) Metal Additives in the Composition of Ni-M/Ce0.5Zr0.5O2/Al2O3 Catalysts
International Journal of Hydrogen Energy. 2020. V.45. N58. P.33352-33369. DOI: 10.1016/j.ijhydene.2020.09.011 WOS Scopus РИНЦ AN OpenAlex

Dates:

Submitted:	Jul 22, 2020
Accepted:	Sep 2, 2020
Published online:	Sep 26, 2020
Published print:	Nov 27, 2020

Identifiers:

Web of science:	WOS:000593706600017
Scopus:	2-s2.0-85091685043
Elibrary:	45261575
Chemical Abstracts:	2020:1886162
OpenAlex:	W3088182823

Citing:

DB	Citing
Scopus	30
Web of science	27
Elibrary	30
OpenAlex	28

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