TG/DTA-MS evaluation of methane cracking and coking on doped nickel-zirconia based cermets
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Journal of Thermal Analysis and Calorimetry
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Cermet materials based on metallic nickel and
cubic zirconia are the key material for applications on solid
oxide fuel cells and high temperature water electrolysis. The
main advantage is the possibility of direct feeding a
hydrocarbon fuel, like methane, or even an alcohol as a
source of hydrogen. The reforming reaction on the Ni catalyst surface can produce hydrogen continuously. However,
the resulting catalyst poisoning by carbon deposition (coking) imparts their broad application. The work shows the
evaluation of coking tolerance of some cermets prepared by
mechanical alloying techniques and compares new additives
specially chosen in order to avoid coking and increase the
catalytic activity. Refractory metal additives besides copper
were added to the basic cermet. While copper is a known
doping agent that avoids coking, the refractory metals (Mo
and W) have a twofold effect: promote sintering at lower
temperatures and increase Cu activity due to their mutual
immiscibility. Results of TG/DTA-MS analysis demonstrate both refractory metals have increased the coking tolerance as well as the catalytic activity during diluted
methane cracking. Molybdenum and tungsten additives are
promised regarding the improvement of these cermet
materials for high temperature electrochemical devices.
Como referenciar
RESTIVO, THOMAZ A.G.; MELLO CASTANHO, SONIA R.H.; TENORIO, JORGE A. TG/DTA-MS evaluation of methane cracking and coking on doped nickel-zirconia based cermets. Journal of Thermal Analysis and Calorimetry, v. 118, n. 1, p. 75-81, 2014. DOI: 10.1007/s10973-014-4003-0. Disponível em: http://repositorio.ipen.br/handle/123456789/23242. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.