Influence of Ce-precursor and fuel on structure and catalytic activity of combustion synthesized Ni/CeO2 catalysts for biogas oxidative steam reforming

Vita, Antonio; Italiano, Cristina; Fabiano, C.; Laganà, M.; Pino, L.

doi:10.1016/j.matchemphys.2015.07.048

Cited by 59 publications

(32 citation statements)

References 54 publications

(44 reference statements)

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“…The average crystallite size of the samples, calculated by the Scherrer equation (Table 1), indicated particles size of 11.4 nm for the CeO 2 sample, that slightly increased to 23.7-27.1 nm for Pt/CeO 2 systems; this evidence could be related to the preparation methodology. As previously reported, morphological characteristics of combustion-synthesized powders are closely related to the nature of combustion, mainly combustion enthalpy and flame temperature [37,38]. It is evident that lower flame temperatures (Fig.…”

Section: Catalysts Characterizationsupporting

confidence: 75%

“…Pt/CeO 2 samples exhibited specific surface areas varying in the range of 8-12 m 2 /g, lower than 22 m 2 /g obtained for the CeO 2 ; this could be due to the effect of flame temperature recorded during the combustion synthesis, higher with Pt/CeO 2 catalysts (991-1263 • C) than with CeO 2 (535 • C) [37,38]. XRD patterns of calcined CeO 2 sample and Pt/CeO 2 catalysts are shown in Fig.…”

Section: Catalysts Characterizationmentioning

confidence: 74%

“…Pt/CeO 2 catalysts were prepared by the Solution Combustion Synthesis (SCS) method, according to the procedure described elsewhere [36][37][38]. In a typical experiment, stoichiometric amount of Ce [Ce(NO 3 ) 3 from Sigma Aldrich] and Pt [H 2 PtCl 6 from Sigma Aldrich] precursors with the suitable quantity of fuel [urea, CH 4 N 2 O from Alfa Aesar] were dissolved in a minimum quantity of water.…”

Section: Catalysts Synthesismentioning

confidence: 99%

See 2 more Smart Citations

Hydrogen-rich gas production by steam reforming of n-dodecane

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Section: Catalysts Characterizationsupporting

confidence: 75%

Section: Catalysts Characterizationmentioning

confidence: 74%

Section: Catalysts Synthesismentioning

confidence: 99%

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Hydrogen-rich gas production by steam reforming of n-dodecane

Vita

Italiano

Fabiano

et al. 2016

Applied Catalysis B: Environmental

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“…Recently, we proved that solution combustion synthesis (SCS) is a suitable procedure to in-situ deposit uniform, thin and high-strength catalytic layers on the surface of both ceramic monoliths [7,25,[30][31][32] and foams [7,44]. The SCS method takes the advantage of an exothermic, very quick and self-sustaining chemical reaction between metal precursors and an organic fuel (i.e., urea), resulting in the synthesis of nanocrystalline oxide powders over the surface of structured supports [4,[45][46][47].…”

Section: Introductionmentioning

confidence: 98%

Rh/CeO2 Thin Catalytic Layer Deposition on Alumina Foams: Catalytic Performance and Controlling Regimes in Biogas Reforming Processes

et al. 2018

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: The application of ceramic foams as structured catalyst supports is clearly expanding due to faster mass/heat transfer and higher contact efficiency than honeycomb monoliths and, mainly, packed beds. In this paper, alumina open-cell foams (OCFs) with different pore density (20, 30 and 40 ppi) were coated with Rh/CeO2 catalyst via a two steps synthesis method involving: (i) the solution combustion synthesis (SCS) to in-situ deposit the CeO2 carrier and (ii) the wet impregnation (WI) of the Rh active phase. The catalytic coatings were characterized in terms of morphology and adhesion properties by SEM/EDX analysis and ultrasounds test. Permeability and form coefficient were derived from pressure drop data. Catalytic performance was evaluated towards biogas Steam Reforming (SR) and Oxy-Steam Reforming (OSR) processes at atmospheric pressure by varying temperature (800–900 °C) and space velocity (35,000–140,000 NmL·g−1·h−1). Characteristics time analysis and dimensionless numbers were calculated to identify the controlling regime. Stability tests were performed for both SR and OSR over 200 h of time-on-stream (TOS) through consecutive start-up and shut-down cycles. As a result, homogenous, thin and high-resistance catalytic layers were in situ deposited on foam struts. All structured catalysts showed high activity, following the order 20 ppi < 30 ppi ≈ 40 ppi. External interphase (gas-solid) and external diffusion can be improved by reducing the pore diameter of the OCF structures. Anderson criterion revealed the absence of internal heat transfer resistances, as well as Damköhler and Weisz-Prater numbers excluded any internal mass transfer controlling regime, mainly due to thin coating thickness provided by the SCS method. Good stability was observed over 200 h of TOS for both SR and OSR processes.

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“…A series of ceria‐supported nickel catalysts were produced by Vita et al where an investigation concerning the reducer's adequacy (oxalyldihydrazide, urea, carbohydrazide, and glycerol) the cerium precursor (cerium nitrate and cerium ammonium nitrate) and the nickel loading (3.1–15.6 wt%) was conducted. According to their studies, urea permits the improvement of nickel dispersion, surface area, particle size, and reducibility of the catalysts, enhancing the catalytic performances of Ni/CeO 2 catalysts over biogas oxy‐stem reforming …”

Section: Hydrogen Production Processesmentioning

confidence: 99%

Review of Recent Studies on Solution Combustion Synthesis of Nanostructured Catalysts

et al. 2018

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Solution combustion synthesis (SCS) is a relatively new method for synthesizing catalytic materials with many distinct advantages: simplicity of method, short reaction times, and the capability to regulate crystal lattice parameters and thereby the activity and selectivity of catalysts. Over the last years, SCS has been used for the production and study of a multitude of new catalytic materials. This review considers and discusses the recent developments and trends in SCS of nanocatalysts, while special attention is paid to the development and applications of nanostructured catalysts.

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Influence of Ce-precursor and fuel on structure and catalytic activity of combustion synthesized Ni/CeO2 catalysts for biogas oxidative steam reforming

Cited by 59 publications

References 54 publications

Hydrogen-rich gas production by steam reforming of n-dodecane

Hydrogen-rich gas production by steam reforming of n-dodecane

Rh/CeO2 Thin Catalytic Layer Deposition on Alumina Foams: Catalytic Performance and Controlling Regimes in Biogas Reforming Processes

Review of Recent Studies on Solution Combustion Synthesis of Nanostructured Catalysts

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