Steam reforming of n -hexadecane using a Pd / ZrO 2 catalyst: Kinetics of catalyst deactivation
A systematic study of catalyst deactivation is required for the development of a coke resistant and sulfur tolerant catalyst for diesel fuel reforming systems to be used in conjunction with the solid oxide fuel cell (SOFC). In the present study, the performance of a Pd – ZrO 2 catalyst coated on a m...
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Published in | International journal of hydrogen energy Vol. 32; no. 14; pp. 2868 - 2874 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier Ltd
2007
|
Subjects | |
Online Access | Get full text |
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Summary: | A systematic study of catalyst deactivation is required for the development of a coke resistant and sulfur tolerant catalyst for diesel fuel reforming systems to be used in conjunction with the solid oxide fuel cell (SOFC). In the present study, the performance of a
Pd
–
ZrO
2
catalyst coated on a metal foil at various steam to carbon ratios (S/C), temperatures
(
T
)
and sulfur content (S) of the fuel were investigated for the steam reforming of
n
-hexadecane using a tubular reactor. Here
n
-hexadecane is used as the surrogate for diesel fuel. A decrease in time dependent hydrogen yield indicated catalyst deactivation, with the effects of reaction conditions on the rate of deactivation determined through a statistically designed experiment. A first-order kinetic model, with first-order deactivation rate, was used to obtain best fit values for the reaction rate constant
(
k
0
)
and the deactivation rate constant
(
k
d
)
as a function of S/C, temperature and sulfur loading. Palladium-catalyzed steam reforming of
n
-hexadecane was adequately modeled using first-order kinetics, the reaction rate was enhanced by increased temperatures and S/C ratios, but was decreased by the presence of sulfur. Catalyst deactivation was more rapid in the presence of sulfur, at low S/C ratios, and at lower temperatures. |
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ISSN: | 0360-3199 1879-3487 |
DOI: | 10.1016/j.ijhydene.2007.03.019 |