Temperature profile of catalyst bed during oxidative steam reforming of methane over Pt-Ni bimetallic catalysts

Li, Baitao; Kado, Shigeru; Mukainakano, Yuya; Nurunnabi, Mohammad; Miyao, Toshihiro; Naito, Shuichi; Kunimori, Kimio; Tomishige, Keiichi

doi:10.1016/j.apcata.2006.02.025

Cited by 80 publications

(38 citation statements)

References 47 publications

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“…The temperature profi le was measured using infrared thermograph equipment through a window installed in the electric furnace. Details of the thermographical observation were reported previously 16) . Catalyst weight and pretreatment conditions are described for each of the activity tests.…”

Section: Methodsmentioning

confidence: 99%

“…In contrast, oxidative steam reforming of methane can be operated at higher feed rates because the oxidative steam reforming of methane provides an internal heat supply. On the other hand, hot-spot formation becomes more serious at higher feed rates 16) . Therefore, suppression of hot-spot formation will help to increase productivity.…”

Section: Resistance To Oxidation Of Ni Enhanced Bymentioning

confidence: 99%

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Oxidative Steam Reforming of Methane over Ni Catalysts Modified with Noble Metals

Tomishige

2007

J. Jpn. Petrol. Inst.

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The effects of addition of small amounts of noble metals such as Pt, Pd, and Rh to Ni/γ-Al2O3 and NiO _ MgO solid solutions were investigated on the catalyst activation, catalyst bed temperature profi le, and carbon formation behavior in oxidative steam reforming of methane. Addition of Pt and Pd by a sequential impregnation method to Ni/γ-Al2O3 had a much more remarkable effect than by a co-impregnation method on the resistance to deactivation by oxidation of Ni and suppression of hot-spot formation. Temperature-programmed reduction, extended X-ray absorption fine structure, and Fourier transform infrared spectroscopy suggested that the noble metal atoms introduced by the sequential impregnation method were preferably located on the surface to form an alloy. Addition of noble metals (Pt, Pd, and Rh) to Ni0.2Mg0.8O solid solution catalysts inhibited carbon formation in the oxidative steam reforming of methane under pressurized conditions.

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Section: Methodsmentioning

confidence: 99%

Section: Resistance To Oxidation Of Ni Enhanced Bymentioning

confidence: 99%

Oxidative Steam Reforming of Methane over Ni Catalysts Modified with Noble Metals

Tomishige

2007

J. Jpn. Petrol. Inst.

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“…This result indicates that the synergy between Pd and Ni decreases the bed temperature and suppresses the hot-spot formation. According to our previous reports, the catalytic performance and bed temperature profile on bimetallic catalysts in oxidative steam reforming of methane are strongly influenced by the structure of 6 bimetallic particles and by the preparation method [7][8][9][10][11][12]. Therefore, catalysts prepared by different methods were evaluated in oxidative steam reforming of methane.…”

Section: Catalytic Performance and Catalyst Bed Temperature Profile Imentioning

confidence: 99%

“…Here, one strategy is the combination of high reducibility of noble metals with high reforming activity of Ni. The Pt-Ni and Pd-Ni bimetallic catalysts supported on γ-Al 2 O 3 were investigated and the relation between the structure of bimetallic particles and the resistance to hot-spot formation in oxidative reforming of methane has been reported [7][8][9][10][11][12]. Here, we tested the bimetallic catalysts supported on α-Al 2 O 3 with larger Ni loading amount, which will be more applicable to a practical process.…”

Section: Introductionmentioning

confidence: 99%

“…Considering the high cost and limited availability of noble metals, the main component should be nickel. Therefore, our group has been developing Ni-based catalysts modified with a small amount of noble metal for oxidative reforming of methane with high resistance to hot-spot formation [7][8][9][10][11][12]. Here, one strategy is the combination of high reducibility of noble metals with high reforming activity of Ni.…”

Section: Introductionmentioning

confidence: 99%

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Oxidative steam reforming of methane over Ni/α-Al2O3 modified with trace Pd

Yoshida

Okumura

Miyao

et al. 2008

Applied Catalysis A: General

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Ni catalysts supported on α-Al 2 O 3 modified with small amounts of Pd were prepared by different impregnation methods to investigate catalytic performance and catalyst bed temperature profile in oxidative steam reforming of methane. The Pd+Ni bimetallic catalysts prepared by the co-impregnation method showed higher resistance to hot-spot formation than monometallic Ni and bimetallic Pd/Ni catalysts prepared by two sequential impregnations, in particular, Pt+Ni catalysts prepared by the co-impregnation method. The additive effect of Pd on the Pd/Ni catalysts was discussed on the bases of metal particle size and structural analysis by Pd K-edge extended X-ray absorption fine structure. Graphical AbstractThe Pd+Ni bimetallic catalysts supported on α-Al 2 O 3 prepared by a co-impregnation method are much more effective for the suppression of hot-spot formation in oxidative steam reforming of methane than the corresponding monometallic catalysts, which is caused by synergy between Pd with high reducibility and Ni with high reforming activity.

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Energieeffiziente Synthesegasproduktion durch katalytische Sauerstoff‐Reformierung von Methan

Choudhary

2008

Angewandte Chemie

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Das wachsende Interesse an der Umwandlung von schlecht zugänglichem Methan in einfach zu transportierende Flüssigkeiten sowie an der Brennstoffzellentechnologie hat für neuen Auftrieb bei der Suche nach effizienten Synthesegasproduktionsprozessen gesorgt. Die Herstellung von Synthesegas (CO/H2), einem sehr vielseitig verwendbaren Zwischenprodukt, ist oft der teuerste Schritt bei der Umwandlung von Methan in höherwertige flüssige Brennstoffe. In dieser Übersicht soll die katalytische Sauerstoff‐Reformierung von Methan diskutiert werden. Dieser Prozess ist sehr energieeffizient und kann Synthesegas mit hohen Raum‐Zeit‐Ausbeuten liefern. Da die Langzeitstabilität der verwendeten Katalysatoren entscheidend ist für eine großkommerzielle Nutzung dieses Prozesses, gibt es eine enorme Zahl an Untersuchungen über Katalysatoren. Wir wollen uns hier auf die Fragen konzentrieren, die bei der Entwicklung von Katalysatoren für die Oxy‐Reformierung eine große Rolle spielen. Daneben werden jedoch auch wichtige Aspekte ähnlicher Prozesse, der katalytischen Oxy‐Dampf‐, Oxy‐CO2‐ und Oxy‐Dampf‐CO2‐Reformierung, behandelt werden.

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Temperature profile of catalyst bed during oxidative steam reforming of methane over Pt-Ni bimetallic catalysts

Cited by 80 publications

References 47 publications

Oxidative Steam Reforming of Methane over Ni Catalysts Modified with Noble Metals

Oxidative Steam Reforming of Methane over Ni Catalysts Modified with Noble Metals

Oxidative steam reforming of methane over Ni/α-Al2O3 modified with trace Pd

Energieeffiziente Synthesegasproduktion durch katalytische Sauerstoff‐Reformierung von Methan

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