Ceria–Zirconia-Supported Ruthenium Catalysts for Hydrogen Production by Ammonia Decomposition

Vadim A. Borisov, Zaliya A. Fedorova, Victor L. Temerev, Mikhail V. Trenikhin, Dmitry A. Svintsitskiy, Ivan V. Muromtsev, Alexey B. Arbuzov, Alexey B. Shigarov, Pavel V. Snytnikov () and Dmitry A. Shlyapin
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Vadim A. Borisov: Center of New Chemical Technologies BIC, Boreskov Institute of Catalysis SB RAS, Neftezavodskaya St., 54, 644040 Omsk, Russia
Zaliya A. Fedorova: Boreskov Institute of Catalysis SB RAS, Lavrentiev Ave. 5, 630090 Novosibirsk, Russia
Victor L. Temerev: Center of New Chemical Technologies BIC, Boreskov Institute of Catalysis SB RAS, Neftezavodskaya St., 54, 644040 Omsk, Russia
Mikhail V. Trenikhin: Center of New Chemical Technologies BIC, Boreskov Institute of Catalysis SB RAS, Neftezavodskaya St., 54, 644040 Omsk, Russia
Dmitry A. Svintsitskiy: Boreskov Institute of Catalysis SB RAS, Lavrentiev Ave. 5, 630090 Novosibirsk, Russia
Ivan V. Muromtsev: Center of New Chemical Technologies BIC, Boreskov Institute of Catalysis SB RAS, Neftezavodskaya St., 54, 644040 Omsk, Russia
Alexey B. Arbuzov: Center of New Chemical Technologies BIC, Boreskov Institute of Catalysis SB RAS, Neftezavodskaya St., 54, 644040 Omsk, Russia
Alexey B. Shigarov: Boreskov Institute of Catalysis SB RAS, Lavrentiev Ave. 5, 630090 Novosibirsk, Russia
Pavel V. Snytnikov: Boreskov Institute of Catalysis SB RAS, Lavrentiev Ave. 5, 630090 Novosibirsk, Russia
Dmitry A. Shlyapin: Center of New Chemical Technologies BIC, Boreskov Institute of Catalysis SB RAS, Neftezavodskaya St., 54, 644040 Omsk, Russia

Energies, 2023, vol. 16, issue 4, 1-16

Abstract: Commercial cerium–zirconium oxide supports (Ce 0.5 Zr 0.5 O 2 , Ce 0.75 Zr 0.25 O 2 , and Ce 0.4 Zr 0.5 Y 0.05 La 0.05 O 2 ) were used to prepare Ru/CeZrO x catalysts. According to the XRD and IR spectroscopy data, the supports consist of ceria-based substitutional solid solutions. The specific surface areas of supports and catalysts are similar and range from 71–89 m 2 /g. As shown by TEM and XRD methods, the size of support particles equals 6–11 nm. According to the TEM data, the size of ruthenium particles does not exceed 1.3 nm. The catalyst activity in the ammonia decomposition process was studied. The Ru/Ce 0.75 Zr 0.25 O 2 catalyst at temperature 500 °C and GHSV 120,000 h −1 demonstrated the highest hydrogen productivity of 53.3 mmol H 2 /(g cat ·min) and compares well with the best results reported in the literature. The kinetics of ammonia decomposition reaction were calculated using the Temkin–Pyzhov exponential expression. The developed mathematical model well described the experimental data. The studied catalysts demonstrated high activity for the ammonia decomposition reaction.

Keywords: ammonia decomposition; commercial supports; cerium–zirconium oxide; ruthenium; Temkin–Pyzhov kinetics (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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