Hydrogen production from n-butanol over alumina and modified alumina nickel catalysts

Bizkarra, K.; Barrio, V.L.; Yartu, A.; Requies, J.; Arias, P.L.; Cambra, J.F.

doi:10.1016/j.ijhydene.2015.01.055

Cited by 47 publications

(15 citation statements)

References 25 publications

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“…and several oxide supports (Al 2 O 3 , CeO 2 , MgO, ZrO 2 , zeolite, etc.) [16][17][18][19][20][21][22][23], so as to develop excellent catalysts to obtain hydrogen as high yield as possible together with high resistance of coke deposition. Transition metals (especially Ni-based) catalysts, which have the high C-C and C-H bonds breaking activity, have been proved to be very effective for hydrocarbons steam reforming reactions as noble metal catalysts [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

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Catalytic Performance and Characterization of Ni-Co Bi-Metallic Catalysts in n-Decane Steam Reforming: Effects of Co Addition

Yu¹,

Jiao

Wang³

et al. 2018

Catalysts

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Co-Ni bi-metallic catalysts supported on Ce-Al2O3 (CA) were prepared with different Co ratios, and the catalytic behaviors were assessed in the n-decane steam reforming reaction with the purpose of obtaining high H2 yield with lower inactivation by carbon deposition. Physicochemical characteristics studies, involving N2 adsorption-desorption, X-ray diffraction (XRD), H2-temperature-programmed reduction (H2-TPR), NH3 temperature programmed reduction (NH3-TPD), SEM-energy dispersive spectrometer (EDS), and transmission electron microscope (TEM)/HRTEM, were performed to reveal the textural, structural and morphological properties of the catalysts. Activity test indicated that the addition of moderate Co can improve the hydrogen selectivity and anti-coking ability compared with the mono-Ni/Ce-Al2O3 contrast catalyst. In addition, 12% Co showed the best catalytic activity in the series Co-Ni/Ce-Al2O3 catalysts. The results of catalysts characterizations of XRD and N2 adsorption-desorption manifesting the metal-support interactions were significantly enhanced, and there was obvious synergistic effect between Ni and Co. Moreover, the introduction of 12% Co and 6% Ni did not exceed the monolayer saturation capacity of the Ce-Al2O3 support. Finally, 6 h stability test for the optimal catalyst 12%Co-Ni/Ce-Al2O3 demonstrated that the catalyst has good long-term stability to provide high hydrogen selectivity, as well as good resistance to coke deposition.

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Section: Introductionmentioning

confidence: 99%

“…Moreover, the lower cost improved its applicability. Therefore, more and more researchers focused on studying hydrocarbon steam reforming over Ni-based catalysts [16][17][18][19][20][21]. However, coking is easily deposited on the surface of the active phase Ni, which can lower the catalytic activity [24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Catalytic Performance and Characterization of Ni-Co Bi-Metallic Catalysts in n-Decane Steam Reforming: Effects of Co Addition

Yu¹,

Jiao

Wang³

et al. 2018

Catalysts

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“…In particular, K‐HM2 resulted in higher H 2 yields of 81.8 % than HM1 (70.3 %) and HM2 (75.4 %). Our results were encouraging compared to those reported previously …”

Section: Resultsmentioning

confidence: 99%

“…Our results were encouraging compared to those reported previously. [3,9,49] Regeneration and cyclic stability studies An economicala nd sustainable sorbent is one that resists process variations and maintains its adsorption capacity over an umber of cycles of carbonation-regeneration. As eries of formed decomposes to CaO with the releaseo ft he adsorbed CO 2 .T he use of steam during reactivation facilitates the process and regenerates the basic HTlc structure along with coke inhibition.…”

Section: Influenceo Ft He Ghsv On Sorption-enhancedr Eformingmentioning

confidence: 99%

New Hybrid Materials for Improved Hydrogen Production by the Sorption‐Enhanced Steam Reforming of Butanol

Dewoolkar

Vaidya

2017

Energy Tech

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Catalytically assisted steam reforming coupled with the selective separation of the produced CO2 is a promising approach for improved H2 production. In this work, we synthesized a new mixture (K‐Ni‐CaO/HTlc) of two potential sorbents CaO and hydrotalcite (HTlc), the promoter K, and the reforming catalyst Ni. This hybrid material was tested for the sorption‐enhanced steam reforming of butanol (SESRB) and its performance was compared to that of two unpromoted hybrid materials Ni‐CaO/HTlc and Ni‐CaO/Al2O3. All these hybrid materials were able to produce high‐purity H2. In particular, K‐Ni‐CaO/HTlc exhibited the highest H2 concentration (98.7 mol %) and adsorption capacity (12.8 mol CO2 kgsorbent−1) at 823 K. The cyclic durability was tested for 25 cycles, and K‐Ni‐CaO/HTlc was stable for up to 21 cycles. Conversely, Ni‐CaO/HTlc and Ni‐CaO/Al2O3 remained stable for 15 and 11 cycles only. The addition of K as a promoter was justified by the improved H2 production and multicycle resilience. Finally, a plausible reaction mechanism for SESRB that predominates over the investigated hybrid materials was suggested.

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“…A principal matéria-prima para a produção da alumina é o mineral bauxita e quando calcinada ou sinterizada, a alumina pode apresentar diversas fases cristalográficas, dentre elas temos: a γ-alumina e outras aluminas de transição (γ, δ, θ, η, ρ, κ, χ). A gama-alumina (γ-Al2O3) é uma das formas comercialmente mais utilizadas e apresenta propriedades ácidas na forma de sítios de Lewis (CAO; RAMBO;SIEBER, 2004;AUROUX;SHEN, 2006;BIZKARRA et al, 2015;GUAN et al, 2016).…”

Section: Catalisadores De Níquel Suportados Em Alumina Na Reforma a Vunclassified

Catalisadores de Ni suportados em Al2O3 modificados com V, Nb e Zn aplicados na reforma à vapor do ácido butírico para produção de H2

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Hydrogen production from n-butanol over alumina and modified alumina nickel catalysts

Cited by 47 publications

References 25 publications

Catalytic Performance and Characterization of Ni-Co Bi-Metallic Catalysts in n-Decane Steam Reforming: Effects of Co Addition

Catalytic Performance and Characterization of Ni-Co Bi-Metallic Catalysts in n-Decane Steam Reforming: Effects of Co Addition

New Hybrid Materials for Improved Hydrogen Production by the Sorption‐Enhanced Steam Reforming of Butanol

Catalisadores de Ni suportados em Al<sub>2</sub>O<sub>3</sub> modificados com V, Nb e Zn aplicados na reforma à vapor do ácido butírico para produção de H<sub>2</sub>

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