Control of Ni/Ce1-xMxOy Catalyst Properties Via the Selection of Dopant M = Gd, La, Mg. Part 2. Catalytic Activity

  • M. A. Kerzhentsev Boreskov Institute of Catalysis SB RAS, pr. Ak. Lavrentieva 5, 630090 Novosibirsk, Russia
  • E. V. Matus Boreskov Institute of Catalysis SB RAS, pr. Ak. Lavrentieva 5, 630090 Novosibirsk, Russia; Novosibirsk State Technical University, pr. K. Marksa 20, 630073 Novosibirsk, Russia
  • I. Z. Ismagilov Boreskov Institute of Catalysis SB RAS, pr. Ak. Lavrentieva 5, 630090 Novosibirsk, Russia
  • O. B. Sukhova Boreskov Institute of Catalysis SB RAS, pr. Ak. Lavrentieva 5, 630090 Novosibirsk, Russia
  • P. Bharali Tezpur University, Napaam, Tezpur - 784 028 Assam, India
  • Z. R. Ismagilov Boreskov Institute of Catalysis SB RAS, pr. Ak. Lavrentieva 5, 630090 Novosibirsk, Russia; Institute of Coal Chemistry and Material Science FRC CCC SB RAS, pr. Sovetskiy 18, 650000 Kemerovo, Russia
Keywords: autothermal reforming, ethanol, ceria, dopant, Ni catalyst

Abstract

To elucidate the role of support composition in autothermal reforming of ethanol (ATR of C2H5OH), a series of Ni catalysts (Ni content 2–15 wt.%) supported on different ceria-based oxides (Ce1-xGdxOy, Ce1-xLaxOy and Ce1-xMgxOy; x = 0.1–0.9) were prepared. The synthetized materials were tested in ATR of ethanol at 200–700 °C. It was established that supports themselves show catalytic activity in ATR of C2H5OH and provide 10–15% yield of H2 at 700 °C. Upon the increase of Ni content from 2 to 15 wt.% the temperature of 100% ethanol conversion decreases from 700 tо 300 °С, hydrogen yield increases from 25 to 60%, the inhibition of С23 by-products formation, as well as the promotion of decomposition of acetaldehyde occur. The enhancement of catalyst performance in ATR of C2H5OH has been observed in the next series of supports: Ce1-xMgxOy < Ce1-xGdxOy < Ce1-xLaxOy and with a decrease of x to an optimal value that correlates with the improvement of Ni active component reducibility. At 600 °C on 10Ni/Ce0.8La0.2O1.9 catalyst the H2 yield of 50% was achieved at C2H5OH conversion of 100%. Stable and high performance of developed catalysts in ATR of C2H5OH indicates the promise of their use in the production of hydrogen.

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Published
2018-12-21
How to Cite
[1]
M. Kerzhentsev, E. Matus, I. Ismagilov, O. Sukhova, P. Bharali, and Z. Ismagilov, “Control of Ni/Ce1-xMxOy Catalyst Properties Via the Selection of Dopant M = Gd, La, Mg. Part 2. Catalytic Activity”, Eurasian Chem. Tech. J., vol. 20, no. 4, pp. 293-300, Dec. 2018.
Section
Articles