Steam and auto-thermal reforming of bio-ethanol over MgO and CeO2CeO2 Ni supported catalysts

Frusteri, F.; Freni, S.; Chiodo, V.; Donato, Sandro; Bonura, Giuseppe; Cavallaro, S.

doi:10.1016/j.ijhydene.2006.02.024

Cited by 175 publications

(77 citation statements)

References 12 publications

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“…The product distribution obtained at different temperatures is in accordance with the main reaction scheme already reported for this type of catalysts [7]. First, ethanol undergoes decomposition at low temperature: C 2 H 6 O → H 2 + CO + CH 4 , which can be seen in Fig. 2 4 ] at 600 K. At this temperature, however, the amount of hydrogen produced is slightly larger than that of carbon monoxide and methane, especially for the RhPd/CeO 2 -C catalyst, suggesting that dehydrogenation of ethanol also operates at low temperature.…”

Section: Catalytic Performancesupporting

confidence: 88%

“…First, ethanol undergoes decomposition at low temperature: C 2 H 6 O → H 2 + CO + CH 4 , which can be seen in Fig. 2 4 ] at 600 K. At this temperature, however, the amount of hydrogen produced is slightly larger than that of carbon monoxide and methane, especially for the RhPd/CeO 2 -C catalyst, suggesting that dehydrogenation of ethanol also operates at low temperature. Then, at intermediate temperatures the water gas shift (WGS) reaction takes place: CO + H 2 O → H 2 + CO 2 , with the concomitant increase in the hydrogen yield attained.…”

Section: Catalytic Performancementioning

confidence: 99%

“…A micro GC (Agilent 3000A) equipped with MS 5A, Plot U and Stabilwax capillary columns and TCD detectors were used to measure on-line gas concentrations every 5 min. The main products of the reaction were H 2 , CO 2 , CO and CH 4 . Only trace amounts of acetaldehyde were detected for operation at low temperatures, whereas negligible amounts of other products such as ethane, ethylene and acetone were measured.…”

Section: Catalytic Testsmentioning

confidence: 99%

“…An efficient catalyst for hydrogen production from ethanol has to dissociate the C C bond, maintain low CO concentration and also be stable under catalytic operation conditions (avoid coke accumulation). Catalysts based on nickel and cobalt tend to sinter under reaction conditions and have a strong propensity for the methanation process [4,5]. In contrast, noble metals, and in particular Rh and Ru, are known to successfully break the C C bond leading to less coke deposition and thus results in more stable catalysts.…”

Section: Introductionmentioning

confidence: 99%

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The influence of nano-architectured CeO supports in RhPd/CeO2 for the catalytic ethanol steam reforming reaction

Divins

Casanovas

et al. 2015

Catalysis Today

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a b s t r a c tThe ethanol steam reforming (ESR) reaction has been tested over RhPd supported on polycrystalline ceria in comparison to structured supports composed of nanoshaped CeO2 cubes and CeO2 rods tailored toward the production of hydrogen. At 650-700 K the hydrogen yield follows the trend RhPd/CeO2 -cubes > RhPd/CeO2 -rods > RhPd/CeO2 -polycrystalline, whereas at temperatures higher than 800 K the catalytic performance of all samples is similar and close to the thermodynamic equilibrium. The improved performance of RhPd/CeO2 -cubes and RhPd/CeO2 -rods for ESR at low temperature is mainly ascribed to higher water-gas shift activity and a strong interaction between the bimetallic-oxide support interaction. STEM analysis shows the existence of RhPd alloyed nanoparticles in all samples, with no apparent relationship between ESR performance and RhPd particle size. X-ray diffraction under operating conditions shows metal reorganization on {1 0 0} and {1 1 0} ceria crystallographic planes during catalyst activation and ESR, but not on {1 1 1} ceria crystallographic planes. The RhPd reconstructing and tuned activation over ceria nanocubes and nanorods is considered the main reason for better catalytic activity with respect to conventional catalysts based on polycrystalline ceria.

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Section: Catalytic Performancesupporting

confidence: 88%

Section: Catalytic Performancementioning

confidence: 99%

Section: Catalytic Testsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The influence of nano-architectured CeO supports in RhPd/CeO2 for the catalytic ethanol steam reforming reaction

Divins

Casanovas

et al. 2015

Catalysis Today

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“…Moreover, the high thermal stability of ceria is attractive for reactions which are conducted at high temperatures [2]. Therefore, ceria has been extensively utilized in three-way catalysts [5][6][7] and fuel cells [8,9], as well as investigated for its activity in catalytic reactions such as CO oxidation [10,11], steam reforming [12][13][14][15][16][17], and water gas shift (WGS) [18,19].…”

Section: +mentioning

confidence: 99%

Effect of Microgravity on Synthesis of Nano Ceria

et al. 2015

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Cerium oxide (CeO2) was prepared using a controlled-precipitation method under microgravity at the International Space Station (ISS). For comparison, ceria was also synthesized under normal-gravity conditions (referred as control). The Brunauer-Emmett-Teller (BET) surface area, pore volume and pore size analysis results indicated that the ceria particles grown in space had lower surface area and pore volume compared to the control samples. Furthermore, the space samples had a broader pore size distribution ranging from 30-600 Å, whereas the control samples consisted of pore sizes from 30-50 Å range. Structural information of the ceria particles were obtained using TEM and XRD. Based on the TEM images, it was confirmed that the space samples were predominantly nano-rods, on the other hand, only nano-polyhedra particles were seen in the control ceria samples. The average particle size was larger for ceria samples synthesized in space. XRD results showed higher crystallinity as well as larger mean crystal size for the space samples. The effect of sodium hydroxide concentration on synthesis of ceria was also examined using 1 M and 3 M solutions. It was found that the control samples, prepared in 1 M and 3 M sodium hydroxide solutions, did not show a significant difference between the two. However, when the ceria samples were prepared OPEN ACCESSCatalysts 2015, 5 1307 in a more basic medium (3 M) under microgravity, a decrease in the particle size of the nano-rods and appearances of nano-polyhedra and spheres were observed.

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Membrane Reactors, Applications

Basile

Liguori

Iulianelli

2013

Encyclopedia of Membrane Science and Technology

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The development of new value‐added products and the application of innovative technologies are attracting considerable attention in the context of modernization of the oil‐refining, chemical, and petrochemical industries,involving the treatment of aromatic hydrocarbons and olefins and the production of green energy while preserving the environment. Membrane technology can constitute a key challenge in the promotion of scale‐up from fundamental research to large‐scale industry owing to the offer of attractive opportunities in the design, rationalization, and optimization of, for example, energy production. Different operations can be integrated in the same industrial field, leading to important benefits of product quality, plant compactness, and lower environmental impact. As a specific case, high competitiveness and innovation are expected from integrated membrane reactor technology in many segments of conventional industrial activities, especially in areas such as the production of hydrogen from the reforming of hydrocarbons and alcohols or from the exploitation of new greener and alternative energy sources such as biofuels.

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Steam and auto-thermal reforming of bio-ethanol over MgO and CeO2CeO2 Ni supported catalysts

Cited by 175 publications

References 12 publications

The influence of nano-architectured CeO supports in RhPd/CeO2 for the catalytic ethanol steam reforming reaction

The influence of nano-architectured CeO supports in RhPd/CeO2 for the catalytic ethanol steam reforming reaction

Effect of Microgravity on Synthesis of Nano Ceria

Membrane Reactors, Applications

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