Renewable Hydrogen from Ethanol Reforming over CeO2-SiO2 Based Catalysts

Palma, Vincenzo; Ruocco, Concetta; Meloni, Eugenio; Ricca, Antonio

doi:10.3390/catal7080226

Cited by 33 publications

(16 citation statements)

References 69 publications

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“…The Pd/CeO2 and Pd/SiO2 samples exhibited positive peak regions at approximately 300 and 700 °C, and 750 °C, respectively. These positive peaks indicated that bulk PdOx species were reduced to Pd 0 or hydrogen spillover [15,16]. To verify the reduction properties of the Pd catalysts, H 2 -TPR analysis was performed, and the results are shown in Figure 4.…”

Section: Characterization Of Supports and Pd Catalystsmentioning

confidence: 99%

Effect of Oxide Supports on the Activity of Pd Based Catalysts for Furfural Hydrogenation

2020

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We investigated the effect of oxide supports on the hydrogenation of furfural over Pd catalysts on various supports (Al2O3, SiO2, TiO2, CeO2, and ZrO2). Pd catalysts (5 wt%) prepared by chemical reduction on various supports. The dispersion and uniformity of Pd were affected by the properties of the support and by the nucleation and growth of Pd. The conversion of furfural was enhanced by greater Pd dispersion. The selectivity for cyclopentanone and tetrahydrofurfuryl alcohol was affected by physicochemical properties of Pd catalyst and reaction parameters. High Pd dispersion and high acidity of the catalyst led to greater C=C hydrogenation, thereby, generating more tetrahydrofurfuryl alcohol. The Pd/TiO2 catalyst showed the highest cyclopentanone yield than other catalysts. The Pd/TiO2 catalyst exhibited the >99% furfural conversion, 55.6% cyclopentanone selectivity, and 55.5% cyclopentanone yield under the optimal conditions; 20 bar of H2, at 170 °C for 4 h with 0.1 g of catalyst.

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Section: Characterization Of Supports and Pd Catalystsmentioning

confidence: 99%

Effect of Oxide Supports on the Activity of Pd Based Catalysts for Furfural Hydrogenation

2020

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“…Some bimetallic or multi-component catalysts have higher CH 4 conversion rates compared to their single-metal catalysts-for example, Pd/Al 2 O 3 modified with NiO and MgO [16], Rh-LaMnO 3 /Al 2 O 3 [17], Ce-Cr/γ-Al 2 O 3 [18], Ni-Cr/yttria-doped Ce [19], Rh-LaMnO 3 honeycomb [20], and Au-Pd/nanohybrid 3D macroporous La 0.6 Sr 0.4 MnO 3 [21,22]. In the presence of two or more main metal components, the reported activity of these catalysts was mostly enhanced due to a synergistic catalytic effect and/or the second metal added enhanced dispersion of the main active species [23].…”

Section: Introductionmentioning

confidence: 99%

Chromium-Ruthenium Oxides Supported on Gamma-Alumina as an Alternative Catalyst for Partial Combustion of Methane

et al. 2019

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Catalyst screening of γ-Al2O3-supported, single-metal and bimetallic catalysts revealed several bimetallic catalysts with activities for partial combustion of methane greater than a benchmark Pt/γ-Al2O3 catalyst. A cost analysis of those catalysts identified that the (2 wt%Cr + 3 wt% Ru)/γ-Al2O3 catalyst, denoted as 2Cr3Ru/Al2O3, was about 17.6 times cheaper than the benchmark catalyst and achieved a methane conversion of 10.50% or 1.6 times higher than the benchmark catalyst based on identical catalyst weights. In addition, various catalyst characterization techniques were performed to determine the physicochemical properties of the catalysts, revealing that the particle size of RuO2 became smaller and the binding energy of Ru 3d also shifted toward a lower energy. Moreover, the operating conditions (reactor temperature and O2/CH4 ratio), stability, and reusability of the 2Cr3Ru/Al2O3 catalyst were investigated. The stability test of the catalyst over 24 h was very good, without any signs of coke deposition. The reusability of the catalyst for five cycles (6 h for each cycle) was noticeably excellent.

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“…Many researchers have made an effort to synthesize compatible catalysts for use in diesel reforming [8,9]. Ethanol reforming for hydrogen production was conducted over several catalysts (Ni/CeO 2 -SiO 2 , Pt/CeO 2 -SiO 2 , Pt-Ni/CeO 2 -SiO 2 , and Ni/CeO 2 ) [10,11]. Precious metal-based (Pt, Pd, Rh, and Ru) catalysts exhibit better resistance to carbon deposition and sulfur poisoning than Ni-based catalysts.…”

Section: Introductionmentioning

confidence: 99%

Performance of an Auto-Reduced Nickel Catalyst for Auto-Thermal Reforming of Dodecane

Jung³

et al. 2018

Catalysts

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To investigate the catalytic performance of diesel reforming catalysts for production of hydrogen gas, Ni-Al catalyst was prepared by the polymer-modified incipient method (NA10-PM). NA10-PM showed excellent catalytic performance and economic feasibility in the auto-thermal reforming reaction, compared to other commercially available catalysts. In particular, auto-reduced NA10-PM showed higher dodecane conversion and similar selectivity at 750 °C compared to H2-reduced NA10-PM. X-ray diffraction (XRD) studies showed that the fresh state of NA10-PM initially automatically reduced by product gases through thermal decomposition of dodecane, and then NiAl2O4 was completely reduced to metallic nickel by the CO and H2 gases produced during the reaction. Additionally, catalytic performance of auto-reduced NA10-PM were investigated at varying steam/carbon molar ratio (S/C) and oxygen/carbon molar ratio (O2/C) in order to determine the optimum conditions of the auto-thermal reforming reaction. The conversion of dodecane over auto-reduced NA10-PM catalyst was remarkable (93%) and increased during the reaction, under conditions of S/C = 1.23, O2/C = 0.25, and gas hourly space velocity of 12,000 h−1 at 750 °C. The results of this study demonstrated that the auto-reduced NA10-PM catalyst was applied successfully for auto-thermal reforming of dodecane.

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Renewable Hydrogen from Ethanol Reforming over CeO2-SiO2 Based Catalysts

Cited by 33 publications

References 69 publications

Effect of Oxide Supports on the Activity of Pd Based Catalysts for Furfural Hydrogenation

Effect of Oxide Supports on the Activity of Pd Based Catalysts for Furfural Hydrogenation

Chromium-Ruthenium Oxides Supported on Gamma-Alumina as an Alternative Catalyst for Partial Combustion of Methane

Performance of an Auto-Reduced Nickel Catalyst for Auto-Thermal Reforming of Dodecane

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