Influence of Cs Promoter on Ethanol Steam-Reforming Selectivity of Pt/m-ZrO2 Catalysts at Low Temperature

Rajabi, Zahra; Jones, L.R.; Martinelli, Michela; Qian, Dali; Cronauer, Donald C.; Kropf, A. Jeremy; Watson, Caleb D.; Jacobs, Gary

doi:10.3390/catal11091104

Cited by 8 publications

(3 citation statements)

References 32 publications

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“…The key step of ethanol reforming is the cracking of the C−C bond. The C−C bond can be cracked easily through the use of ruthenium and platinum ( Davda et al, 2005 ; Zhao et al, 2019 ; Rajabi et al, 2021 ; Zare et al, 2021 ). The initial partial ethanol oxidation provided the potential for the dehydrogenation of the ethanol (Eqs 5 , 6 ) and its decarbonylation (Eq.…”

Section: Resultsmentioning

confidence: 99%

Effect of support on the performance of PtRu-based catalysts in oxidative steam reforming of ethanol to produce hydrogen

Tang

Liu²,

Yu³

et al. 2022

Front. Chem.

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Oxidative steam reforming of ethanol (OSRE) to produce hydrogen has been investigated over a series of supported PtRu catalysts, with different supports. Bimetallic PtRu-based catalysts were prepared by the impregnation method using H2PtCl6 and RuCl3 as precursors. Six supports (reducible oxides of ZrO2, CeO2, and Co3O4, and irreducible oxides of ZnO, Al2O3, and NiO) were chosen to fabricate bimetallic catalysts. The catalytic performance of the OSRE reaction in the series of PtRu-based samples was evaluated using a fixed-bed flow reactor under atmospheric pressure. In front reaction, the catalyst was pre-activated by reduction under 200°C for 3 h. The gas hourly space velocity was adjusted at 66,000 h−1, and the optimal molar ratios of the H2O/EtOH and O2/EtOH feeds were 4.9 and 0.44, respectively. The results indicated that the PtRu supported on the ZrO2 and CeO2 exhibited superior catalytic performance in the OSRE reaction under a low temperature (a TR of approximately 320°C) for producing the main products of H2 and CO2 with lower CO and CH4 by-products. Also, it was quite stable during a long time evaluation; the maximum YH2 maintained at 4.5–4.2, and the CO distribution approached 3.3–3.5 mol% around 84 h test at 340°C over the PtRu/ZrO2 catalyst.

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Section: Resultsmentioning

confidence: 99%

Effect of support on the performance of PtRu-based catalysts in oxidative steam reforming of ethanol to produce hydrogen

Tang

Liu²,

Yu³

et al. 2022

Front. Chem.

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show abstract

“…The addition of Cs to a zirconia support for a Pt/ZrO 2 catalyst was shown to improve the catalyst activity towards the ethanol decarboxylation route over the decarbonylation pathway, thus enhancing the hydrogen production rate [34]: a cesium loading of 2.9 wt% was able to stave off decarbonylation almost completely; under the same operating conditions (450 • C, 1 atm, and H 2 O/C 2 H 5 OH = 9), the amount of sodium that is required to achieve the same effect is almost 80% higher [35]. Similarly, the contribution of the latter route can be augmented by promoting monoclinic zirconia with 3.1 wt% K or 6.7 wt% Rb [36].…”

Section: Catalytic Formulationsmentioning

confidence: 99%

The Route from Green H2 Production through Bioethanol Reforming to CO2 Catalytic Conversion: A Review

et al. 2022

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Currently, a progressively different approach to the generation of power and the production of fuels for the automotive sector as well as for domestic applications is being taken. As a result, research on the feasibility of applying renewable energy sources to the present energy scenario has been progressively growing, aiming to reduce greenhouse gas emissions. Following more than one approach, the integration of renewables mainly involves the utilization of biomass-derived raw material and the combination of power generated via clean sources with conventional power generation systems. The aim of this review article is to provide a satisfactory overview of the most recent progress in the catalysis of hydrogen production through sustainable reforming and CO2 utilization. In particular, attention is focused on the route that, starting from bioethanol reforming for H2 production, leads to the use of the produced CO2 for different purposes and by means of different catalytic processes, passing through the water–gas shift stage. The newest approaches reported in the literature are reviewed, showing that it is possible to successfully produce “green” and sustainable hydrogen, which can represent a power storage technology, and its utilization is a strategy for the integration of renewables into the power generation scenario. Moreover, this hydrogen may be used for CO2 catalytic conversion to hydrocarbons, thus giving CO2 added value.

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“…Metals, e.g. cobalt, nickel, copper, and platinum, are often catalysts [3][4][5][6][7][8]. Of these, cobalt is very attractive because it is cheaper than noble metals.…”

Section: Introductionmentioning

confidence: 99%

A Promising Cobalt Catalyst for Hydrogen Production

et al. 2022

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In this work, a metal cobalt catalyst was synthesized, and its activity in the hydrogen production process was tested. The substrates were water and ethanol. Activity tests were conducted at a temperature range of 350–600 °C, water to ethanol molar ratio of 3 to 5, and a feed flow of 0.4 to 1.2 mol/h. The catalyst had a specific surface area of 1.75 m2/g. The catalyst was most active at temperatures in the range of 500–600 °C. Under the most favorable conditions, the ethanol conversion was 97%, the hydrogen production efficiency was 4.9 mol (H2)/mol(ethanol), and coke production was very low (16 mg/h). Apart from hydrogen and coke, CO2, CH4, CO, and traces of C2H2 and C2H4 were formed.

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Influence of Cs Promoter on Ethanol Steam-Reforming Selectivity of Pt/m-ZrO2 Catalysts at Low Temperature

Cited by 8 publications

References 32 publications

Effect of support on the performance of PtRu-based catalysts in oxidative steam reforming of ethanol to produce hydrogen

Effect of support on the performance of PtRu-based catalysts in oxidative steam reforming of ethanol to produce hydrogen

The Route from Green H2 Production through Bioethanol Reforming to CO2 Catalytic Conversion: A Review

A Promising Cobalt Catalyst for Hydrogen Production

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