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Academic literature on the topic 'Compact ethanol reformers'

Author: Grafiati
Published: 6 September 2023

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Journal articles on the topic "Compact ethanol reformers"

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Pla, D., M. Salleras, A. Morata, I. Garbayo, M. Gerbolés, N. Sabaté, N. J. Divins, A. Casanovas, J. Llorca, and A. Tarancón. "Standalone ethanol micro-reformer integrated on silicon technology for onboard production of hydrogen-rich gas." Lab on a Chip 16, no. 15 (2016): 2900–2910. http://dx.doi.org/10.1039/c6lc00583g.

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Ultra-compact miniaturized ethanol micro-reformers based on highly packed vertically-aligned silicon-through micro-channels were fabricated by mainstream micro technology for on board generation of hydrogen-rich fuel.
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Kaur Sidhu, Tejas Puneet, and Shantanu Roy. "Optimal design of washcoated monolith catalyst for compact, heat -integrated ethanol reformers." International Journal of Hydrogen Energy 44, no. 23 (May 2019): 11472–87. http://dx.doi.org/10.1016/j.ijhydene.2019.03.129.

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Khaodee, Watcharapong, Tara Jiwanuruk, Khunnawat Ountaksinkul, Sumittra Charojrochkul, Jarruwat Charoensuk, Suwimol Wongsakulphasatch, and Suttichai Assabumrungrat. "Compact Heat Integrated Reactor System of Steam Reformer, Shift Reactor and Combustor for Hydrogen Production from Ethanol." Processes 8, no. 6 (June 19, 2020): 708. http://dx.doi.org/10.3390/pr8060708.

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A compact heat integrated reactor system (CHIRS) of a steam reformer, a water gas shift reactor, and a combustor were designed for stationary hydrogen production from ethanol. Different reactor integration concepts were firstly studied using Aspen Plus. The sequential steam reformer and shift reactor (SRSR) was considered as a conventional system. The efficiency of the SRSR could be improved by more than 12% by splitting water addition to the shift reactor (SRSR-WS). Two compact heat integrated reactor systems (CHIRS) were proposed and simulated by using COMSOL Multiphysics software. Although the overall efficiency of the CHIRS was quite a bit lower than the SRSR-WS, the compact systems were properly designed for portable use. CHIRS (I) design, combining the reactors in a radial direction, was large in reactor volume and provided poor temperature control. As a result, the ethanol steam reforming and water gas shift reactions were suppressed, leading to lower hydrogen selectivity. On the other hand, CHIRS (II) design, combining the process in a vertical direction, provided better temperature control. The reactions performed efficiently, resulting in higher hydrogen selectivity. Therefore, the high performance CHIRS (II) design is recommended as a suitable stationary system for hydrogen production from ethanol.
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Cifuentes, Bernay, Felipe Bustamante, and Martha Cobo. "Single and Dual Metal Oxides as Promising Supports for Carbon Monoxide Removal from an Actual Syngas: The Crucial Role of Support on the Selectivity of the Au–Cu System." Catalysts 9, no. 10 (October 13, 2019): 852. http://dx.doi.org/10.3390/catal9100852.

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A catalytic screening was performed to determine the effect of the support on the performance of an Au–Cu based system for the removal of CO from an actual syngas. First, a syngas was obtained from reforming of ethanol. Then, the reformer outlet was connected to a second reactor, where Au–Cu catalysts supported on several single and dual metal oxides (i.e., CeO2, SiO2, ZrO2, Al2O3, La2O3, Fe2O3, CeO2-SiO2, CeO2-ZrO2, and CeO2-Al2O3) were evaluated. AuCu/CeO2 was the most active catalyst due to an elevated oxygen mobility over the surface, promoting CO2 formation from adsorption of C–O* and OH− intermediates on Au0 and CuO species. However, its lower capacity to release the surface oxygen contributes to the generation of stable carbon deposits, which lead to its rapid deactivation. On the other hand, AuCu/CeO2-SiO2 was more stable due to its high surface area and lower formation of formate and carbonate intermediates, mitigating carbon deposits. Therefore, use of dual supports could be a promising strategy to overcome the low stability of AuCu/CeO2. The results of this research are a contribution to integrated production and purification of H2 in a compact system.
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Giunta, Pablo, Norma Amadeo, and Miguel Laborde. "Hydrogen Production from Ethanol Steam Reforming: Fixed Bed Reactor Design." International Journal of Chemical Reactor Engineering 6, no. 1 (January 24, 2008). http://dx.doi.org/10.2202/1542-6580.1582.

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The aim of this work is to design an ethanol steam reformer to produce a hydrogen stream capable of feeding a 60 kW PEM fuel cell applying the plug flow model, considering the presence of the catalyst bed (heterogeneous model). The Dusty-Gas Model is employed for the catalyst, since it better predicts the fluxes of a multicomponent mixture. Moreover, this model has shown to be computationally more robust than the Fickian Model. A power law-type kinetics was used. Results showed that it is possible to carry out the ethanol steam reforming in a compact device (1.66 x 10 -5 to 5.27 x 10 -5 m3). It was also observed that this process is determined by heat transfer.
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Dissertations / Theses on the topic "Compact ethanol reformers"

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Sidhu, Tejas Puneet Kaur. "Modeling the recuperative coupling of exothermic and endothermic reactions in compact ethanol reformers." Thesis, 2017. http://localhost:8080/iit/handle/2074/7475.

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Conference papers on the topic "Compact ethanol reformers"

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Maeda, Tsuyoshi, Toshio Shinoki, Jiro Funaki, and Katsuya Hirata. "Hydrogen Production by Bio-Fuel Steam Reforming at Low Reaction Temperature." In ASME 2011 Power Conference collocated with JSME ICOPE 2011. ASMEDC, 2011. http://dx.doi.org/10.1115/power2011-55383.

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The authors reveal the dominant chemical reactions and the optimum conditions, supposing the design of ethanol steam-reforming reactors. Specifically speaking, experiments are conducted for Cu/ZnO/Al2O3 catalyst, together with those for Ru/Al2O3 catalyst for reference. Using a household-use-scale reactor with well-controlled temperature distributions, the authors compare experimental results with chemical-equilibrium theories. It has revealed by Shinoki et al. (2011) that the Cu/ZnO/Al2O3 catalyst shows rather high performance with high hydrogen concentration CH2 at low values of reaction temperature TR. Because, the Cu/ZnO/Al2O3 catalyst promotes the ethanol-steam-reforming and water-gas-shift reactions, but does not promote the methanation reaction. So, in the present study, the authors reveal that the Ru/Al2O3 catalyst needs high TR > 770 K for better performance than the Cu/ZnO/Al2O3 catalyst, and that the Ru/Al2O3 catalyst shows lower performance at TR < 770 K. Then, the Ru/Al2O3 catalyst is considered to activate all the three reactions even at low TR. Furthermore, concerning the Cu/ZnO/Al2O3 catalyst, the authors reveal the influences of liquid-hourly space velocity LHSV upon concentrations such as CH2, CCO2, CCO and CCH4 and the influence of LHSV upon the ethanol conversion XC2H5OH, in a range of LHSV from 0.05 h−1 to 0.8 h−1, at S/C = 3.0 and TR = 520 K. And, the authors reveal the influences of the thermal profile upon CH2, CCO2, CCO, CCH4 and XC2H5OH, for several LHSV’s. To conclude, with well-controlled temperatures, the reformed gas can be close to the theory. In addition, the authors investigate the influences of S/C.
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