Co catalysts supported on SiO2 and γ-Al2O3 applied to ethanol steam reforming: Effect of the solvent used in the catalyst preparation method

Lucrédio, Alessandra Fonseca; Bellido, Jorge David Alguiar; Zawadzki, Andressa de; Assaf, Elisabete Moreira

doi:10.1016/j.fuel.2010.12.036

Cited by 50 publications

(19 citation statements)

References 18 publications

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“…Oxide phases can also participate differently in the water activation step. In very recent times a number of different formulations have been studied and proposed for Co catalysts for ESR, such as unsupported Co oxides [14e16], Co/CeO 2 [19,23,24], Co/SiO 2 [16,25], Co/Al 2 O 3 [25,26], Co/CaOeAl 2 O 3 [27], Co/MgO [26], coprecipitated [20,21] or impregnated Co/MgOeAl 2 O 3 [26], Co/ ZnO [24,28], coprecipitated Co/ZnOeAl 2 O 3 [18], Co/ZrO 2 [27] and Co/ZrO 2 eZnO [29], Co/TiO 2 [24], Co/talc [30], etc. Furthermore, promoting cobalt or alloying it with other metals such as Ni [18,27,31], Ru [32], Ir [24], Fe [17,28], Cu, Cr, Na [28] and K [20], is also under investigation.…”

Section: Introductionmentioning

confidence: 99%

Cobalt-based nanoparticles as catalysts for low temperature hydrogen production by ethanol steam reforming

Garbarino

Riani

Lucchini

et al. 2013

International Journal of Hydrogen Energy

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Section: Introductionmentioning

confidence: 99%

Cobalt-based nanoparticles as catalysts for low temperature hydrogen production by ethanol steam reforming

Garbarino

Riani

Lucchini

et al. 2013

International Journal of Hydrogen Energy

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“…Ho and Su have reported that the presence of ethoxy groups hinder the aggregation of Co 2 O 3 during its formation from the thermal decomposition of cobalt nitrate [31]. The influence of other solvents in metallic dispersion has been also reported in literature [32,33]. Lucredio et al [32] have investigated the effect of methanol in the preparation of Co catalysts.…”

Section: Introductionmentioning

confidence: 96%

Removal of anionic dye from aqueous solution using a cationic carrier

Muthuraman

Ibrahim

2013

International Journal of Industrial Chemistry

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Ethanol steam reforming was studied over Ni/MgAl 2 O 4 -CeO 2 catalysts. The catalysts were prepared using different impregnation media (ethanol or water) and Ni precursors (nitrate or acetate). The use of an alcoholic solution did not affect the specific surface area, but promoted the NiO formation reducible at lower temperature affecting the Ni-support interactions and the Ce 3+ /Ce 4+ initial ratios. All catalysts were highly active in the reforming reaction of ethanol with a high initial conversion of ethanol under more severe conditions than those commonly used in literature. The best catalytic behavior was found over the catalyst prepared from an ethanolic solution of Ni(NO 3 ) 2 . This sample showed a high Ce 3+ /Ce 4+ ratio, an adequate interaction Ni-support and an average Ni diameter around 28 nm. This catalyst was stable under the reforming conditions used in this work: initial ethanol concentration: 9.4%, reaction temperature: 650 °C, W/F = 49 g min mol −1 C 2 H 5 OH and reaction time: 40 h. The ethanol conversion was almost complete with H 2 selectivity around 78%.

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“…In comparison to the base metal catalysts, the noble metal catalysts show a higher catalytic activity [8] for steam reforming of ethanol but are very expensive. Non-noble metal catalysts based on Co, Cu or Ni also exhibit good catalytic performance for hydrogen production [9][10][11][12] and are less expensive alternative. Among them, especially cobalt-based materials are reported as catalysts ensuring a high conversion of ethanol and selectivity to hydrogen as well as good products distribution due to their capacity for C-C bond cleavage [9][10].…”

Section: Introductionmentioning

confidence: 99%

Calcium Hydroxyapatite Supported Cobalt Catalysts for Ethanol Steam Reforming: Effect of the Incorporation Method of Active Phase

Dobosz¹,

Hull²,

Zawadzki³

2018

Studia UBB Chemia

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ABSTRACT. Cobalt catalysts supported on calcium hydroxyapatite (Ca10(PO4)6(OH)2, HAp) and modified with cerium ions were prepared in two different ways: direct microwave-assisted hydrothermal synthesis or incipient wetness impregnation method and characterized by XRD, TEM, SEM/EDS, FT-IR and Raman spectroscopy, N2 adsorption-desorption, TPD-NH3, TPR-H2 and XPS. The results indicate that Ca under hydrothermal conditions while cobalt and cerium species are formed on the HAp surface during support impregnation. Catalytic activity of samples was tested for hydrogen production via ethanol steam reforming (SRE), and it was found that the highest hydrogen yield (over 3,5 mol H2/mol C2H5OH) and the best distribution of products were obtained for the catalyst prepared by the incipient wetness impregnation method. For this catalyst, Co species formed on the HAp surface was easier reducible than Co 2+ ions located in the HAp crystal lattice, and surface was characterized by lower acidity.

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Co catalysts supported on SiO2 and γ-Al2O3 applied to ethanol steam reforming: Effect of the solvent used in the catalyst preparation method

Cited by 50 publications

References 18 publications

Cobalt-based nanoparticles as catalysts for low temperature hydrogen production by ethanol steam reforming

Cobalt-based nanoparticles as catalysts for low temperature hydrogen production by ethanol steam reforming

Removal of anionic dye from aqueous solution using a cationic carrier

Calcium Hydroxyapatite Supported Cobalt Catalysts for Ethanol Steam Reforming: Effect of the Incorporation Method of Active Phase

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