Steam reforming of ethanol on supported nickel catalysts

Liberatori, J.W.C.; Ribeiro, R.U.; Zanchet, Daniela; Noronha, Fábio B.; Bueno, J.M.C.

doi:10.1016/j.apcata.2007.05.010

Cited by 149 publications

(88 citation statements)

References 41 publications

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“…The observed bands at 2056 and 2037 cm − 1 can be related to CO linearly bonded to the Ni surface [51] in agreement with Blackmond and Ko [52]. The bands 1952-1892 cm − 1 can be assigned to CO molecules bridge-bonded to Ni atoms.…”

Section: Ftir Of Adsorbed Cosupporting

confidence: 76%

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Influence of copper on nickel-based catalysts in the conversion of glycerol

Miranda

Chimentão

Szanyi

et al. 2015

Applied Catalysis B: Environmental

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The catalytic transformation of glycerol to value-added compounds was investigated over bimetallic Ni-Cu/y-Al2 O3 catalysts with Ni/Cu atomic ratios of 8/1, 4/1, 2/1, 1/1, 1/2, 1/4, and 1/8. XPS analysis revealed that the surface composition of the catalyst exhibited progressive enrichment of Cu as its content in the catalyst increased. H2 -chemisorption indicated that the total number of exposed Ni atoms decreased as the Cu content increased. As a result, deep hydrogenolysis to produce CH4 was inhibited by the addition of Cu to the Ni catalyst, yielding higher selectivity toward the dehydration products of glycerol such as hydroxyacetone.FTIR spectra of adsorbed CO reveal that Cu asserts both geometric and electronic effects on the adsorption properties of Ni. The geometrical effect is visualized by the progressive disappearance of the bridge-bound adsorbed CO on metallic Ni by the incorporation of Cu. This suggests that the deep hydrogenolysis of glycerol to CH4 formation requires an ensemble of adjacent active Ni atoms. The electronic effect of Cu on Ni is indicated by the red shift of the IR peak of adsorbed CO as the Cu content increases. The electronic interaction between Cu and Ni species was also substantiated by XANES results. HTREM revealed metal particles very well distributed on the support with particle size of 1.5 to 5 nm. The Ni-Cu samples were not a total intermetallic alloys..

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Section: Ftir Of Adsorbed Cosupporting

confidence: 76%

“…The high frequency band at 2100-2000 cm − 1 can be assigned to linearly adsorbed CO on metallic Ni. The low frequency band at 2000-1800 cm − 1 is attributed to CO adsorbed in two or three fold bridge configuration on metallic Ni [51]. Fig .…”

Section: Ftir Of Adsorbed Comentioning

confidence: 99%

Influence of copper on nickel-based catalysts in the conversion of glycerol

Miranda

Chimentão

Szanyi

et al. 2015

Applied Catalysis B: Environmental

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“…Among these reactions, one of the most important is the water gas shift reaction (WGSR, Equation (2)), which favors CO2 formation with increasing H2 and decreasing CO concentrations in the outlet stream [5]. For low-temperature proton exchange membrane fuel cell (PEMFC) applications, a low CO concentration (<100 ppm) is required.…”

Section: Introductionmentioning

confidence: 99%

“…The SRE can also be represented by a network of reactions (Equations (2)- (10)) [5][6][7], depending on the reaction conditions and the catalyst used, to reflect the formation of a complex set of by-products including carbon monoxide (CO), methane (CH4), ethane (C2H6), ethylene (C2H4), and acetaldehyde (CH3CHO) [4,8,9]. …”

Section: Introductionmentioning

confidence: 99%

Hydrogen Production by Steam Reforming of Ethanol on Rh-Pt Catalysts: Influence of CeO2, ZrO2, and La2O3 as Supports

et al. 2015

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CeO2-, ZrO2-, and La2O3-supported Rh-Pt catalysts were tested to assess their ability to catalyze the steam reforming of ethanol (SRE) for H2 production. SRE activity tests were performed using EtOH:H2O:N2 (molar ratio 1:3:51) at a gaseous space velocity of 70,600 h −1 between 400 and 700 °C at atmospheric pressure. The SRE stability of the catalysts was tested at 700 °C for 27 h time on stream under the same conditions. RhPt/CeO2, which showed the best performance in the stability test, also produced the highest H2 yield above 600 °C, followed by RhPt/La2O3 and RhPt/ZrO2. The fresh and aged catalysts were characterized by TEM, XPS, and TGA. The higher H2 selectivity of RhPt/CeO2 was ascribed to the formation of small (~5 nm) and stable particles probably consistent of Rh-Pt alloys with a Pt surface enrichment. Both metals were oxidized and acted as an almost constant active phase during the stability test owing to strong metal-support interactions, as well as the superior oxygen mobility of the support. The TGA results confirmed the absence of carbonaceous residues in all the aged catalysts.

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“…Oxide catalysts show good activity but usually insuffi cient selectivity. Among base metal catalysts, Ni-based give high ethanol conversion with high selectivity to hydrogen but CH 4 or CO content in the reaction products is comparatively high 10 . Cu-based catalysts exhibit good activity but H 2 yield is relatively low 11 .…”

Section: Introductionmentioning

confidence: 99%

Catalytic activity of cobalt and cerium catalysts supported on calcium hydroxyapatite in ethanol steam reforming

Dobosz

Hull

Zawadzki

2016

Polish Journal of Chemical Technology

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In this paper, Co,Ce/Ca 10 (PO 4 ) 6 (OH) 2 catalysts with various cobalt loadings for steam reforming of ethanol (SRE) were prepared by microwave-assisted hydrothermal and sol-gel methods, and characterized by XRD, TEM, TPR-H 2 , N 2 adsorption-desorption measurements and cyclohexanol (CHOL) decomposition tests. High ethanol conversion (close to 100%) was obtained for the catalysts prepared by both methods but these ones prepared under hydrothermal conditions (HAp-H) ensured higher hydrogen yield (3.49 mol H 2 /mol C 2 H 5 OH) as well as higher amount of hydrogen formed (up to 70%) under reaction conditions. The superior performance of 5Co,10Ce/HAp-H catalyst is thought to be due to a combination of factors, including increased reducibility and oxygen mobility, higher density of basic sites on its surface, and improved textural properties. The results also show a signifi cant effect of cobalt loading on catalysts effi ciency in hydrogen production: the higher H 2 yield exhibit catalysts with lower cobalt content, regardless of the used synthesis method.

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Steam reforming of ethanol on supported nickel catalysts

Cited by 149 publications

References 41 publications

Influence of copper on nickel-based catalysts in the conversion of glycerol

Influence of copper on nickel-based catalysts in the conversion of glycerol

Hydrogen Production by Steam Reforming of Ethanol on Rh-Pt Catalysts: Influence of CeO2, ZrO2, and La2O3 as Supports

Catalytic activity of cobalt and cerium catalysts supported on calcium hydroxyapatite in ethanol steam reforming

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