Influence of metal cation doping on Ru/CeO2/Al2O3 catalyst for steam reforming of desulfurized kerosene

Miyamoto, Manabu; Arakawa, Masami; Oumi, Yasunori; Uemiya, Shigeyuki

doi:10.1016/j.ijhydene.2014.12.111

Cited by 22 publications

(11 citation statements)

References 30 publications

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“…The fresh catalysts were characterized by wide‐angle XRD (Figure ). All the catalysts exhibit fluorite structure of ceria . For all the catalysts, no crystalline of PrO 2 was observed, which indicates that Pr was successfully doped into ceria lattice to form a homogeneous solid oxide.…”

Section: Resultsmentioning

confidence: 92%

“…Long‐chain hydrocarbon fuels, such as n ‐dodecane, have widely used as hydrogen source since their high density, high hydrogen yield and good transportability . However, n ‐dodecane conversion by steam reforming is a more complex process than that of the short‐chain hydrocarbon, because more types of C─C and C─H bonds will be involved . Moreover, coke deposition happens more easily with the increase of carbon chain length .…”

Section: Introductionmentioning

confidence: 99%

“…In order to suppress carbon deposition and prevent Ni sintering, many works have been done to design and develop new catalysts . As a multifunctional material, CeO 2 can be not only used as promoter but also as support of nickel due to its gasification of deposited coke . Moreover, metal‐doped ceria has received great attention .…”

Section: Introductionmentioning

confidence: 99%

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Optimizing the preparation of Ni‐Ce‐Pr catalysts for efficient hydrogen production by n ‐dodecane steam reforming

et al. 2019

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Summary Nowadays, the development of fuel cell is getting more and more inseparable from the production of hydrogen. Long‐chain hydrocarbons steam reforming is a feasible way for hydrogen supply. Herein, various nickel‐ceria‐praseodymium (Ni‐Ce‐Pr) catalysts have been prepared by a sol‐gel method. Multiple parameters during catalyst preparation, including the amount of Ni, the content of doped Pr and the calcination temperature, were systematically studied for tuning the catalytic performance for n‐dodecane steam reforming in a fixed‐bed reactor under 15 mL/gcat·h at 600°C and water‐to‐carbon molar ratio of 2 at 0.1 MPa. Reaction data showed that both the amount of Ni and the content of doped Pr will greatly affect the n‐dodecane conversion and hydrogen production. Additionally, the calcination temperature during catalyst preparation showed a big influence on its performance for n‐dodecane steam reforming. After optimization, 10Ni‐CePr2‐600 exhibits the highest activity and stability for n‐dodecane steam reforming, accompanying with the lowest rate of coke deposition (0.015 gc/gcat·h). The structure and oxygen vacancy of the catalyst was characterized by H2‐TPR, Raman, and X‐ray photoelectron spectroscopy (XPS). The superior activity and stability of 10Ni‐CePr2‐600 are ascribed to the strong interaction between NiO and support along with abundant oxygen vacancies in the Pr‐doped ceria.

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Section: Resultsmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

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Optimizing the preparation of Ni‐Ce‐Pr catalysts for efficient hydrogen production by n ‐dodecane steam reforming

et al. 2019

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“…Owing to the low reactivity of desulfurized kerosene, catalyst development has been the main research for steam reforming of desulfurized kerosene so far (Muramoto et al, 2009;Miyamoto et al, 2015) and less investigation concerning membrane reforming of desulfurized kerosene has been reported. Previously, we investigated the membrane reforming of dodecane to evaluate the membrane reforming of desulfurized kerosene and found that the pre-reforming was essential to achieve sufficient performance of Pd membrane reformers because of its low reactivity (Miyamoto et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Effect of Co-products on Pd Membrane Performance in Membrane Reforming of Desulfurized Kerosene

Miyamoto

Hayakawa

Oumi

et al. 2017

J. Chem. Eng. Japan / JCEJ

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Hydrogen production using a Pd membrane reformer from desulfurized kerosene is attractive in view of the portable and domestic use of fuel cells. In the present study, membrane reforming of desulfurized kerosene with a pre-reformer was carried out and compared to that of dodecane, which is the main compound in kerosene. The reactivity of desulfurized kerosene was much lower than that of dodecane, resulting in the low performance of the membrane reformer for desulfurized kerosene. In the pre-reforming and membrane reforming of model kerosene (a mixture of dodecane and m-xylene), the performance of the pre-reformer and membrane reformer exhibited a similar trend to those for desulfurized kerosene. This low performance of the membrane reformer may be ascribed to the lowering of Pd membrane performance. From the evaluation of Pd membrane performance in the presence of co-products in the pre-reforming of desulfurized kerosene and model kerosene, polycyclic aromatics such as naphthalenes, anthracene and pyrene reduced the H 2 permeability of Pd membranes.

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“…Most of the hydrogen produced currently comes from catalytic steam reforming of natural gas [1]. Steam reforming of natural gas is a mature technology as a practical application, and it has been employed for hydrogen production from various hydrogen sources such as liquefied petroleum gas [2,3] iso-octane [4] and kerosene [5][6][7][8]. Considering the sustainable society, hydrogen production from fossil fuels is undesirable, and it would shift to renewable sources such as biomass-derived fuels.…”

Section: Introductionmentioning

confidence: 99%

Effects of Catalysts and Membranes on the Performance of Membrane Reactors in Steam Reforming of Ethanol at Moderate Temperature

et al. 2016

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Steam reforming of ethanol in the membrane reactor using the Pd 77 Ag 23 membrane was evaluated in Ni/CeO 2 and Co/CeO 2 at atmospheric pressure. At 673 K, the H 2 yield in the Pd 77 Ag 23 membrane reactor over Co/CeO 2 was found to be higher than that over Ni/CeO 2 , although the H 2 yield over Ni/CeO 2 exceeded that over Co/CeO 2 at 773 K. This difference was owing to their reaction mechanism. At 773 K, the effect of H 2 removal could be understood as the equilibrium shift. In contrast, the H 2 removal kinetically inhibited the reverse methane steam reforming at low temperature. Thus, the low methane-forming reaction rate of Co/CeO 2 was favorable at 673 K. The addition of a trace amount of Ru increased the H 2 yield effectively in the membrane reactor, indicating that a reverse H 2 spill over mechanism of Ru would enhance the kinetical effect of H 2 separation. Finally, the effect of membrane performance on the reactor performance by using amorphous alloy membranes with different compositions was evaluated. The H 2 yield was set in the order of H 2 permeation flux regardless of the membrane composition.

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Influence of metal cation doping on Ru/CeO2/Al2O3 catalyst for steam reforming of desulfurized kerosene

Cited by 22 publications

References 30 publications

Optimizing the preparation of Ni‐Ce‐Pr catalysts for efficient hydrogen production by n ‐dodecane steam reforming

Optimizing the preparation of Ni‐Ce‐Pr catalysts for efficient hydrogen production by n ‐dodecane steam reforming

Effect of Co-products on Pd Membrane Performance in Membrane Reforming of Desulfurized Kerosene

Effects of Catalysts and Membranes on the Performance of Membrane Reactors in Steam Reforming of Ethanol at Moderate Temperature

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