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

M. A. Kerzhentsev; E. V. Matus; I. Z. Ismagilov; O. B. Sukhova; P. Bharali; Z. R. Ismagilov

doi:10.18321/ectj762

Authors

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

DOI:

https://doi.org/10.18321/ectj762

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 (Ce_1-xGd_xO_y, Ce_1-xLa_xO_y and Ce_1-xMg_xO_y; 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 С₂-С₃ 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: Ce_1-xMg_xO_y < Ce_1-xGd_xO_y < Ce_1-xLa_xO_y 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/Ce_0.8La_0.2O_1.9 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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