Catalytic partial oxidation and steam reforming of methane on La2O3–Al2O3 supported Pt catalysts as observed by X-ray absorption spectroscopy

Rocha, K.O.; Santos, João Batista Oliveira dos; Meira, Débora Motta; Pizani, P. S.; Marques, C.M.P.; Zanchet, Daniela; Bueno, J.M.C.

doi:10.1016/j.apcata.2012.04.022

Cited by 24 publications

(13 citation statements)

References 49 publications

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“…The metallic hydrides can be a possible source of hydrogen during transportation, but a practical storage possibility is far from reality [4]. Reforming reactions have been shown to be effective for on-board hydrogen generation and thus can solve the transportation problems [5][6][7][8][9]. In comparison to the other sources, hydrogen production from alcohols has become a matter of great interest, methanol being the most favorable source due to its various advantages [3,4,10].…”

Section: Introductionmentioning

confidence: 99%

Combustion synthesized copper-ion substituted FeAl2O4 (Cu0.1Fe0.9Al2O4): A superior catalyst for methanol steam reforming compared to its impregnated analogue

Maiti

Llorca

Domínguez

et al. 2016

Journal of Power Sources

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A series of copper ion substituted MAl2O4 (M= Mg, Mn, Fe and Zn) spinels is prepared by a single step solution combustion synthesis (SCS) and tested for methanol steam reforming (MSR). The copper ion substituted Cu0.1Fe0.9Al2O4 appears to be the most active, showing ~98% methanol conversion at 300 °C with ~5% CO selectivity at GHSV= 30000 h-1 and H2O:CH3OH= 1.1. The analogous impregnated catalyst, CuO (10 at.%)/FeAl2O4, is found to be much less active. These materials are characterized by XRD, H2-TPR, BET, HRTEM, XPS and XANES analyses. Spinel phase formation is highly facilitated upon Cu-ion substitution, and Cu loading beyond 10 at.% leads to the formation of CuO as an additional phase. The ionic substitution of copper in FeAl2O4 leads to the highly crystalline SCS catalyst containing Cu 2+ ion sites that are shown to be more active than the dispersed CuO nano-crystallites on the FeAl2O4 impregnated catalyst, despite its lower surface area. The as prepared SCS catalyst contains also a portion of copper as Cu 1+ that increases when subjected to reforming atmosphere. The MSR activity of the SCS catalyst decreases with time-on-stream due to the sintering of catalyst crystallites as established from XPS and HRTEM analyses.

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Section: Introductionmentioning

confidence: 99%

Combustion synthesized copper-ion substituted FeAl2O4 (Cu0.1Fe0.9Al2O4): A superior catalyst for methanol steam reforming compared to its impregnated analogue

Maiti

Llorca

Domínguez

et al. 2016

Journal of Power Sources

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show abstract

“…The first hydrogen abstraction on Rh (111) was 0.02 eV faster than that on Fe (110). 208 However, *H2O and *OH dissociation on Ni (111) surface was 0.28 and 0.13 eV slower than that on Fe (110) surface, respectively. 209 The energy barrier for *H2O dissociation on Cu (111) was higher than 1 eV and the *OH dissociation was even harder with a high energy barrier of 1.51 eV.…”

Section: Resultsmentioning

confidence: 96%

“…The on Co as well as the second hydrogen abstraction, indicating the higher activity of Fe (110) for H2O dissociation. 207 Rh (111) was even more active than Fe (110). The first hydrogen abstraction on Rh (111) was 0.02 eV faster than that on Fe (110).…”

Section: Resultsmentioning

confidence: 97%

“…Final dissociation was 0.47 eV slower on Ni (111) than that on Ni-Mo6S8 and 0.53 eV slower on Cu (111) surface than on Cu-Mo6S8. 196,201 This final step was 0.23 eV slower on Co (111) surface but 0.25 and 0.30 eV faster on Co (110) and (100) surface, respectively. 193 *CH dissociation on Fe-Mo6S8 was 0.66 eV slower than that on Fe (110) surface, and that on Rh-Mo6S8 0.58 eV slower than that on Rh (111) surface.…”

Section: *Ch Dissociationmentioning

confidence: 91%

“…196,201 This final step was 0.23 eV slower on Co (111) surface but 0.25 and 0.30 eV faster on Co (110) and (100) surface, respectively. 193 *CH dissociation on Fe-Mo6S8 was 0.66 eV slower than that on Fe (110) surface, and that on Rh-Mo6S8 0.58 eV slower than that on Rh (111) surface. 192,202 The suppressed dissociations were indicatives of enhanced coking resistance of M-Mo6S8…”

Section: *Ch Dissociationmentioning

confidence: 91%

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Mo6s8-Based Single-Metal-Atom Catalysts for Methanol Synthesis From Steam Reforming of Methane

Zhang¹

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Autothermal Oxidative Coupling of Methane over Pt/Al₂O₃ Catalysts Doped with Rare Earth Oxides

Schardt,

Ehrlich,

Lott

2024

Chemie Ingenieur Technik

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The effect of rare earth oxides as dopants on the Pt‐governed oxidative coupling of methane (Pt‐OCM) is investigated. The addition of 20 wt.‐% of La‐, Nd‐, Sm‐, and Pr‐oxides to the support benefits the C2 product selectivity and offers the potential to enhance the catalyst stability. Compared to the reference catalyst Pt/Al2O3, the addition of Sm2O3 increased the total selectivity by up to 23 %. Furthermore, La2O3 addition was found beneficial with respect to the (thermal) stability of the catalyst. Dopant content variations uncovered that the catalyst formulation with 20 wt.‐% La2O3 represents an optimum regarding performance and stability.

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Catalytic partial oxidation and steam reforming of methane on La2O3–Al2O3 supported Pt catalysts as observed by X-ray absorption spectroscopy

Cited by 24 publications

References 49 publications

Combustion synthesized copper-ion substituted FeAl2O4 (Cu0.1Fe0.9Al2O4): A superior catalyst for methanol steam reforming compared to its impregnated analogue

Combustion synthesized copper-ion substituted FeAl2O4 (Cu0.1Fe0.9Al2O4): A superior catalyst for methanol steam reforming compared to its impregnated analogue

Mo6s8-Based Single-Metal-Atom Catalysts for Methanol Synthesis From Steam Reforming of Methane

Autothermal Oxidative Coupling of Methane over Pt/Al₂O₃ Catalysts Doped with Rare Earth Oxides

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Catalytic partial oxidation and steam reforming of methane on La2O3–Al2O3 supported Pt catalysts as observed by X-ray absorption spectroscopy

Cited by 24 publications

References 49 publications

Combustion synthesized copper-ion substituted FeAl2O4 (Cu0.1Fe0.9Al2O4): A superior catalyst for methanol steam reforming compared to its impregnated analogue

Combustion synthesized copper-ion substituted FeAl2O4 (Cu0.1Fe0.9Al2O4): A superior catalyst for methanol steam reforming compared to its impregnated analogue

Mo6s8-Based Single-Metal-Atom Catalysts for Methanol Synthesis From Steam Reforming of Methane

Autothermal Oxidative Coupling of Methane over Pt/Al2O3 Catalysts Doped with Rare Earth Oxides

Contact Info

Product

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Autothermal Oxidative Coupling of Methane over Pt/Al₂O₃ Catalysts Doped with Rare Earth Oxides