Ni/SiO2 and Ni/ZrO2 catalysts for the steam reforming of ethanol

Rossetti, Ilenia; Biffi, C.; Bianchi, Claudia L.; Nichele, Valentina; Signoretto, Michela; Menegazzo, Federica; Finocchio, Elisabetta; Ramis, Gianguido; Michele, Alessandro Di

doi:10.1016/j.apcatb.2012.02.006

Cited by 127 publications

(88 citation statements)

References 55 publications

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“…No important differences in catalytic activity were observed between the blank test with the empty reactor and those in the presence of only the supports, and total conversion occurred above 600 °C. The blank test produced 0.81 mol H2/mol ethanol inlet at 700 °C (Figure 1b), consistent with the dominance of decomposition reactions instead ethanol reforming in the absence of a catalyst [40,41]. .…”

Section: Introductionmentioning

confidence: 56%

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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Section: Introductionmentioning

confidence: 56%

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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“…Metal-support interactions are generally present, although at a variable extent in t heterogeneous catalytic systems, implying that different combinations result in different performances in terms of activity and selectivity for a given process [113][114][115]. Among the numerous SiO 2 -based materials used as supports for metal catalysts, mesostructured silica nanoparticles (MSN) have recently found wide application in several processes and reactions, such as in drug delivery [116,117], biomedical imaging [118,119], and catalysis [120,121].…”

Section: Silica-supported Nickelmentioning

confidence: 99%

Supported Catalysts for CO2 Methanation: A Review

et al. 2017

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CO 2 methanation is a well-known reaction that is of interest as a capture and storage (CCS) process and as a renewable energy storage system based on a power-to-gas conversion process by substitute or synthetic natural gas (SNG) production. Integrating water electrolysis and CO 2 methanation is a highly effective way to store energy produced by renewables sources. The conversion of electricity into methane takes place via two steps: hydrogen is produced by electrolysis and converted to methane by CO 2 methanation. The effectiveness and efficiency of power-to-gas plants strongly depend on the CO 2 methanation process. For this reason, research on CO 2 methanation has intensified over the last 10 years. The rise of active, selective, and stable catalysts is the core of the CO 2 methanation process. Novel, heterogeneous catalysts have been tested and tuned such that the CO 2 methanation process increases their productivity. The present work aims to give a critical overview of CO 2 methanation catalyst production and research carried out in the last 50 years. The fundamentals of reaction mechanism, catalyst deactivation, and catalyst promoters, as well as a discussion of current and future developments in CO 2 methanation, are also included.

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“…Details on the equipment for activity testing have been previously reported elsewhere [28,29]. Briefly, the catalysts (ca.…”

Section: Activity Testingmentioning

confidence: 99%

Ethylene production via catalytic dehydration of diluted bioethanol: A step towards an integrated biorefinery

Rossetti

Compagnoni

Finocchio

et al. 2017

Applied Catalysis B: Environmental

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After a preliminary thermodynamic investigation, proper operating conditions have been selected to maximise ethylene productivity by ethanol dehydration and limit side products such as coke and higher olefins or oxygenates. We focused on the possibility to operate with a diluted bioethanol solution (ca. 50 wt%), which represents a promising and convenient raw material, obtainable by simple flash concentration of the fermentation broth. Furthermore, water addition to the ethanol dehydration reactor may help preventing catalyst coking and diethyl ether formation, although affecting the thermodynamic products distribution. A proof of concept for an ethanol dehydration process using diluted ethanol is also provided through process simulation. Catalysts based on a BEA zeolite have been compared, characterised by different acidity imparted by dealumination treatments. Ni addition in variable loading helped suppressing undesired byproducts, difficult to separate from ethylene. For instance, no trace of diethyl ether nor acetaldehyde has been observed for the Ni-loaded samples under optimised working conditions. Catalyst characterisation by FT IR allowed correlating a high selectivity to ethylene with the acid sites nature of the catalyst, whereas the presence of extraframework Lewis acidic sites induced faster coke formation. Durability was finally checked on the most active and selective catalyst evidencing stable operation for 80 h-on-stream and without evidence of coke deposition, as determined after characterisation of the spent samples. A γ-Al2O3 catalyst has been tested as benchmark under the same conditions

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Ni/SiO2 and Ni/ZrO2 catalysts for the steam reforming of ethanol

Cited by 127 publications

References 55 publications

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

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

Supported Catalysts for CO2 Methanation: A Review

Ethylene production via catalytic dehydration of diluted bioethanol: A step towards an integrated biorefinery

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