Bibliografías temáticas / Hydrogen recycling

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Literatura académica sobre el tema "Hydrogen recycling"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 17 de junio de 2025

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Artículos de revistas sobre el tema "Hydrogen recycling"

Michizono, S., T. Banno, and A. Kinbara. "Hydrogen recycling in carbon films." Vacuum 41, no. 4-6 (1990): 1493–96. http://dx.doi.org/10.1016/0042-207x(90)94002-8.

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Wilson, K. L., and W. L. Hsu. "Hydrogen recycling properties of graphite." Journal of Nuclear Materials 145-147 (February 1987): 121–30. http://dx.doi.org/10.1016/0022-3115(87)90317-5.

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Yoshida, Shinji, Susumu Ohshita, Hideo Sugai, and Takayoshi Okuda. "Suppression of hydrogen recycling in carbonizations." Kakuyūgō kenkyū 58, no. 5 (1987): 402–10. http://dx.doi.org/10.1585/jspf1958.58.402.

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PENG LI-LIN, XU GUANG-BI, YUAN CHENG-JIE, et al. "HYDROGEN RECYCLING IN HL-1 TOKAMAK." Acta Physica Sinica 41, no. 4 (1992): 594. http://dx.doi.org/10.7498/aps.41.594.

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Imoto, S. "Synergisms in hydrogen recycling: Session summary." Radiation Effects 89, no. 1-2 (1985): 15–19. http://dx.doi.org/10.1080/00337578508220693.

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Pisarev, A. A., A. V. Varava, V. M. Smirnov, and E. R. Dryanina. "Hydrogen recycling constant during ion bombardment." Journal of Nuclear Materials 176-177 (December 1990): 418–21. http://dx.doi.org/10.1016/0022-3115(90)90082-x.

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Bampaou, Michael, Alexios-Spyridon Kyriakides, Kyriakos Panopoulos, Panos Seferlis, and Spyridon Voutetakis. "Modelling of Methanol Synthesis: Improving Hydrogen Utilisation." Chemical Engineering Transactions 88 (October 2, 2021): 931–36. https://doi.org/10.3303/CET2188155.

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Hydrogen is a key component in the methanol (MeOH) synthesis process. It affects both the environmental and economic performance, since renewable hydrogen (usually produced by electrolysis) is the most expensive component of the process. The addition of renewable hydrogen improves the carbon balance of the process but necessitates the planning of a suitable strategy to account for the stochastic nature of renewable energy and the respective costs. For this reason, the focus of this work is the efficient hydrogen utilization in contrast to most of the past literature works that mainly focus on the conversion of the carbonaceous feedstock. Several operating parameters such as the extent of recycling, operating temperature and pressure, stoichiometric number, inlet temperature and total mass flow per tube affect the methanol yield, carbon conversion and hydrogen consumption of the process. The scope of this work is to provide insight on the effect of those parameters on the efficient hydrogen utilisation using a methanol synthesis modelling tool. The findings of this study showed that hydrogen utilisation could be considerably improved if operating at certain conditions. Lower stoichiometric numbers and mass flows per tube, inlet and cooling temperatures up to 510 K and higher operating pressures could reduce the required hydrogen per produced methanol unit. Especially the employment of recycling, could lead to substantial reduction of the associated hydrogen requirements. In particular, recycling 50 % of the residual off-gases could lead to 10 % less fresh hydrogen requirements and 90 % recycling results to 40 % less hydrogen for the production of the same amount of methanol.

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Schorer, Linda, Sven Schmitz, and Alexandra Weber. "Membrane based purification of hydrogen system (MEMPHYS)." International Journal of Hydrogen Energy 44, no. 25 (2019): 12708–14. https://doi.org/10.1016/j.ijhydene.2019.01.108.

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A hydrogen purification system based on the technology of the electrochemical hydrogen compression and purification is introduced. This system is developed within the scope of the project MEMPHYS. Therefore, the project, its targets and the different work stages are presented. The technology of the electrochemical purification and the state of the art of hydrogen purification are described. Early measurements in the project have been carried out and the results are shown and discussed. The ability of the technology to recover hydrogen from a gas mixture can be recognized and an outlook into further optimizations shows the future potential. A big advantage is the simultaneous compression of the purified hydrogen up to 200 bar, therefore facilitating the transportation and storage.

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MICHIZONO, Shinichiro, Tatsuya BANNO, and Akira KINBARA. "Influence of carbonization on hydrogen recycling phenomena." SHINKU 33, no. 8 (1990): 679–85. http://dx.doi.org/10.3131/jvsj.33.679.

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Larsson, D., H. Bergsåker, and A. Hedqvist. "Hydrogen recycling in graphite at higher fluxes." Journal of Nuclear Materials 266-269 (March 1999): 856–61. http://dx.doi.org/10.1016/s0022-3115(98)00552-2.

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Tesis sobre el tema "Hydrogen recycling"

Kianbakhsh, Pejman. "Recycling polymer composite hydrogen pressure vessels." Thesis, University of Nottingham, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.546472.

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By 2002 the world market for polymer composites was 7.2 Million Tons. The automotive and industrial vehicle industry consumes 25% of the world's composite material output. Composite materials benefit the automotive industry in multiple ways. Regulatory pressure that encourages recyclablity and reduction of energy consumption pushes automotive manufacturers to consider new technologies to meet these environmental standards. The work being undertaken in this research is part of an ED integrated Project under the "Sixth Framework of Research and Development Funding". The project title is "Hydrogen Storage Systems for Automotive Application (StorHy)". Within this project, the Recycling Work Package (WP5) aims to develop recycling techniques for glass and carbon fibre reinforced polymer composite pressure vessels that were proposed for hydrogen storage. This thesis describes the development of a SIze reduction technique for the carbon/epoxy and glass/PP pressure vessels with respect to the particle size and investigates ways of preparing the granulated fractions for subsequent processing. An image analysis technique was successfully developed for the characterisation of the reground material from the carbon/epoxy pressure vessel. The same image analysis technique could not be used to analyse the reground material produced from the thermoplastic vessel. Alternatively, the reground material from the thermoplastic vessel were characterised through a sieve analysis technique. The reground material from the thermoset vessel produced in this work could be processed in a fluidized bed rig which is mentioned in a number of publications. In this work, the reground material from the thermoplastic vessel was successfully processed using an injection moulding machine, with mechanical properties as good as comparable to commercial composites. In this study micro mechanical models available in the short fibre composite literature such as Halpin-Tsai and the rule of mixtures were used to predict the stiffness of the injection moulded composites. The trend observed for the Halpin-Tsai model appeared not to be in a good agreement with the experimental data but the rule of mixtures model was found to predict the experimental data more accurately.

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Lixandru, A. "Recycling of Nd-Fe-B permanent magnets by hydrogen processes." Phd thesis, Technische Universität Darmstadt, 2018. https://tuprints.ulb.tu-darmstadt.de/7392/1/10.%20Dissertation%20Lixandru%20-%20lite-3.pdf.

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This thesis is based on the work carried out since January 2014 as a Ph.D. student in the Functional Materials department at Technische Universität Darmstadt. In the first part of my thesis, different waste streams of electrical and electronic equipment from an industrial recycling plant were analyzed in order to localize, identify and collect rare-earth permanent magnets of Nd-Fe-B type. This particular type of magnets were mainly found in hard disk drives from laptops and desktop computers, as well as in loudspeakers from compact products such as flat screen TVs, PC screens, and laptops. The study includes a systematic survey of the chemical composition of the Nd-Fe-B magnets found in the selected waste streams, which illustrates the evolution of the Nd-Fe-B alloys over the years. The study also provides an overview over the types of magnets that are integrated in different waste electric and electronic equipment. After localizing, identifying and recovering the rare-earth permanent magnets from waste electrical and electronic equipment, these magnets were processed together with other Nd-Fe-B scrap magnets from electric motors with a hydrogen based recycling process (hydrogen decrepitation (HD) and hydrogenation disproportionation desorption and recombination (HDDR) processes). The effects of the main HDDR processing parameters: hydrogen pressure, hydrogen desorption rate and temperatures on the magnetic properties of the recycled materials have been investigated systematically and are presented in the second section of the chapter 4. The optimum hydrogen pressures required for the complete disproportionation of the various magnet compositions were determined. It was found that a hydrogen heat treatment composed of two steps (780 °C and 840 °C) and a moderate desorption rate can be used for the magnets having a higher Dy and Co content to obtain high quality anisotropic HDDR powders. In addition to this section, it was performed a study where it was investigated the effects of increasing the Dy content on the processing parameters of the HDDR process. The variation of the magnetic properties for the magnets with different Dy contents processed at different hydrogen pressure, temperature and hydrogen desorption rate are presented in this study. The obtained recycled powders by HD and by HDDR were consolidated by either sintering, spark plasma sintering or bonding with epoxy resin. For the scrap magnets with a low content of Dy and Co, a better recovery of the magnetic properties (above 90%) was achieved compared with the magnets from electric motors (high Dy and Co) where the recovery rate is ~60%. For these magnets a “refreshing” of the recycled powders with 10% Nd90Al10 and Pr75Cu6.25Co18.75 was applied. Different post sintering treatments were applied for these recycled magnets in order to equally distribute the fresh added powder. All these treatments are presented in this study.

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Holmgren, Magnus. "Rening av väte vid återvinning av aluminium : Purification of hydrogen in aluminum recycling." Thesis, Linnéuniversitetet, Institutionen för maskinteknik (MT), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-26479.

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Detta examensarbete har utförts på Stena Aluminium (SA) i Älmhult. Undersökningen handlar om att mäta vätgashalten genom densitetsindexprover på smält aluminium, för att kartlägga hur vätgashalten påverkas av processtegen vid återvinning av aluminium i SAs produktions-anläggning. I arbetet ingick att undersöka vätgashalten för två olika legeringstyper (EN-AB 43400 och 46000), utvärdera avgasningseffektivitet för de utvalda legeringstyperna och att utvärdera den befintliga utgjutningssystemet. Mätningar för undersökningen är utförda i SAs smältverk, vid processtegen raffinering och utgjutning.

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Lixandru, Alexandru [Verfasser], and Oliver [Akademischer Betreuer] Gutfleisch. "Recycling of Nd-Fe-B permanent magnets by hydrogen processes / Alexandru Lixandru ; Betreuer: Oliver Gutfleisch." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2018. http://d-nb.info/1160675007/34.

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Reeve, Holly A. "New approaches for cofactor recycling : application to chemical synthesis and electrochemical devices." Thesis, University of Oxford, 2015. http://ora.ox.ac.uk/objects/uuid:514ec071-36aa-45a9-9f03-15bb22f967c4.

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The work in this Thesis addresses the challenges associated with using redox enzymes for chemical synthesis. The use of enzymes as catalysts in the synthesis of fine chemicals is becoming more wide spread, in part due their ability to catalyse reactions with incredible selectivity under relatively mild conditions. In particular, enzymes are useful for selective reduction of ketones to enantiomerically pure alcohols or amines, and partial oxidations of alkanes to alcohols. However, a key limitation to exploiting redox enzymes in these reaction pathways is the requirement for a specialised electron source, usually the expensive nicotinamide cofactors NADH or NADPH. Existing cofactor regeneration methods use a second enzyme with a sacrificial substrate which is oxidised to generate a stoichiometric waste product; this complicates isolation of the desired product and prevents the environmental benefits of biocatalysis from being fully realised. In order to provide clean and efficient biocatalytic routes, improved recycling methods for these cofactors are crucial. This Thesis develops two novel methods for in situ cofactor recycling. The first is an electro-enzymatic system; an NAD+-reductase enzyme is shown to use electrons directly from an electrode for supply of NADH to a co-immobilised cofactor-dependent enzyme. The second uses a hydrogenase, NAD+ reductase and cofactor-dependent enzyme immobilised on conducting particles for H2-driven NADH regeneration. This relies on the thermodynamically favourable reduction of NAD+ by H2 when the hydrogenase and NAD+-reductase are in electronic contact, provided by the conducting particle. The electro-enzymatic approach to NAD+ reduction is then adapted for electrochemical devices; an enzyme catalysed fuel cell and a self-powered biosensor were considered.

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YANG, QIAOLIN. "PHOTOLYTIC DEGRADATION OF ENVIRONMENTALLY IMPORTANT ORGANIC CONTAMINANTS IN NOVEL ROOM TEMPERATURE IONIC LIQUIDS." University of Cincinnati / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1078454909.

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Reller, Christian. "Heterogen katalysierte Hydrodehalogenierung von Borhalogeniden im Rahmen eines in sich geschlossenen BNHx-Recyclingkonzepts." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2014. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-139115.

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Die eingereichte Dissertation mit dem Thema „Heterogen katalysierte Hydrodehalogenierung von Borhalogeniden im Rahmen eines in sich geschlossenen BNHx-Recyclingkonzepts“ beinhaltet drei für das BNHx-Recycling zentrale Reaktionsschritte: Supersäureaufschluss, Hydrodehalogenierung und den Basenaustausch. Mit Hilfe dieser drei Schritte ist es möglich, die Zersetzungsrückstände von BH3NH3(Polyaminoboran, Borazin und Polyborazylen) wieder in BH3NH3 zu überführen, ohne teure Reduktionsmittel wie LiAlH4 oder Hydrazin verwenden zu müssen. Das Verfahren ermöglichte in einem Durchlauf die Gewinnung von 60 % der eingesetzten Menge an BH3NH3 ohne eine Erzeugung von Abfallprodukten. Mit Hilfe der Chloralkalielelektrolyse kann das Verfahren an Wind- bzw. Solarkraftwerke gekoppelt und über diese alle benötigten Ausgangsstoffe hergestellt werden. Die katalytische Erzeugung von B-H-Spezies auf der Grundlage der Aktivierung von molekularem Wasserstoff ist als Schwerpunkt dieser Arbeit zu sehen. Die mechanistischen Studien lieferten ein genaueres Verständnis über fundamentale Zusammenhänge zwischen dem Lösungsmittel Et3N und der Wasserstoffbereitstellung über die N-CH2-Gruppierung sowie der Wirkungsweise des Katalysators.

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Argane, Rabei. "Valorisation des rejets miniers à faible teneur en sulfures comme granulats pour mortiers." Thesis, Lyon, INSA, 2015. http://www.theses.fr/2015ISAL0039.

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Les résidus miniers représentent les sous-produits minéraux finement broyés issus des procédés de traitement et d’enrichissement des minerais. Durant l’exploitation d’une mine, ces rejets sont habituellement transportés sous formes de pulpes et entreposés en surface dans des aires d’accumulation appelées parcs à résidus. Ces derniers sont des ouvrages, le plus souvent, difficiles à gérer et coûteux à restaurer. Ils sont à l’origine d’une multitude d’impacts environnementaux qui dépendent principalement de leur potentiel polluant, de leur mode de gestion, de la stabilité physique des infrastructures de confinement et des conditions climatiques spécifiques au site d’entreposage. Dans ce contexte, plusieurs études ont été entreprises afin de développer de nouvelles techniques qui permettraient une gestion effective et durable de ces sous-produits minéraux. Des voies de valorisation dans le domaine du BTP ont ainsi été explorées. Les résultats ont montré la possibilité de réutilisation de certains rejets miniers comme matériaux cimentaires et additifs pour mortiers ou béton. Toutefois, la majorité des formulations proposées n’ont pas dépassé le stade du laboratoire. De plus, l’utilisation des rejets miniers comme matériaux de construction est encore sujet à des difficultés en matière d’acceptabilité sociale et à d’innombrables préoccupations, notamment leur stabilité physico-chimique et leur éco-compatibilité. En parallèle, l’utilisation artisanale et non contrôlée des rejets miniers à faibles teneurs en sulfures comme matériaux de construction est en pleine croissance dans quelques pays tel que le Maroc. En effet, à proximité de quelques sites miniers abandonnés, ces rejets sont considérés comme des sables naturels et sont utilisés pour la confection de mortier de finition et de surfaçage des murs d’habitations. Ce recyclage artisanal peut constituer des risques mécaniques et environnementaux liés surtout à la non-conformité mécanique de ces matériaux et à la présence de concentrations non négligeables de métaux résiduels dans les rejets miniers. L’objectif de ce travail de recherche est donc d’évaluer l’impact de l’utilisation actuelle de deux rejets miniers marocains (Zeida et Mibladen), communément utilisés comme agrégats dans la région de la haute-Moulouya, sur les propriétés physico-chimiques des mortiers de finition et d’étudier, sur le long terme, le relargage des métaux lourds en scénario de lixiviation. Ce travail se donne aussi comme objectif spécifique, d’étudier la faisabilité technique d’utilisation des rejets miniers à faible teneur en sulfures comme substituant au sable conventionnel pour la confection de mortiers d’enduit et de maçonnerie Mine tailings represent the finely ground industrial by products generated throw beneficiation of ore minerals. During mine exploitation, these tailings are generally transported in slurry form to large storage facilities, called tailings ponds or impoundments. These facilities are, in most cases, difficult to manage and expensive to rehabilitate. They are responsible for the generation of important environmental impacts and significant ecological disruptions, depending on their pollution potential, management technique, physical stability and the climate conditions. In this context, numerous studies have been conducted to develop new techniques for a sustainable management of mine tailings. The feasibility of reusing some tailings in the construction sector as cementing materials and additives for mortars or concretes were successfully achieved. However, the majority of the conducted studies are still at laboratory stages. Moreover the reuse of tailings as construction material is yet subject of numerous difficulties in term of social acceptance. Various parameters are also of concern, especially the physical and chemical stability of tailings as well as their eco-compatibility. In parallel, the uncontrolled reuse of low sulfide tailings as construction material is increasing in some developing countries (e.g. Morocco). In fact, nearby some abandoned mine sites, these tailings are considered as natural sands and are used for the manufacture of surface finishing mortars. This traditional recycling may constitute mechanical and environmental risks, principally related to tailings mechanical unconformity and to their non-negligible residual metal concentrations. Therefore, the aim of the current research is to evaluate the actual impact of two Moroccan mine tailings (named Zeida and Mibladen), commonly used as aggregates in the Upper-Moulouya region, on the mechanical properties of mortars and on their long term environmental behavior. This work has also as specific aim, to study the technical feasibility of using low sulfide tailings as sand substitute for the manufacture of rendering and masonry mortars. To attain this aim, a thorough characterization of the physical, chemical and mineralogical properties as well as the geochemical behavior of mine tailings was carried out. Mechanical properties of tailings-based mortars were then measured and compared to reference samples (sand-based mortars) using different tests such as setting time, entrained air volume and compressive strength. In parallel, mortars durability and hydration products were evaluated by mean of durability tests (wetting drying cycles, sulfate attack and acid rain simulation) and analytical methods (scanning electron microscopy, X-ray diffraction and thermo-gravimetric analysis). Finally, mortar samples were submitted to various leaching tests to evaluate the pollution potential of these matrices

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Denis, Julien. "Dynamic modelling of local fuel desorption and retention in the wall of nuclear fusion reactors for auto-consistent plasma-wall interaction simulations." Electronic Thesis or Diss., Aix-Marseille, 2019. http://www.theses.fr/2019AIXM0682.

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Dans les réacteurs à fusion nucléaire, un échange constant de particules se développe entre le plasma et la paroi. Ce phénomène, appelé recyclage, présente un intérêt crucial pour ces réacteurs car, une fois le plasma établi, le recyclage représente la principale source de particules pour le plasma. Une connaissance complète du recyclage est donc essentielle pour assurer un contrôle fiable de la densité plasma ainsi qu'une performance optimale du réacteur. Cependant, les études in-situ du recyclage demeurent complexes. La modélisation numérique peut assister dans la compréhension de ce phénomène. Les codes de transport de plasma de bord présentent la description la plus avancée de l’interaction plasma-paroi. La description du recyclage reste néanmoins partielle : la réflexion atomique est déjà traitée tandis que la désorption moléculaire est fixée ad-hoc par l’utilisateur. Cette thèse de doctorat se concentre sur le développement d’une extension au code de transport SolEdge2D-EIRENE, dénommée D-WEE, dont l’objectif est de modéliser la dynamique de la désorption. Afin d’initialiser D-WEE, une séquence de décharges plasma est simulée pour modéliser l’opération d’un tokamak. La dynamique simulée pendant ces décharges est étudiée, révélant des comportements intéressants qui pourraient impacter l’opération du réacteur. Pour évaluer la pertinence de la simulation, une confrontation avec l'expérience est effectuée et révèle un accord qualitatif entre la chute de pression post-décharge simulée (avec une tendance en t^{-0.8}) et celle observée expérimentalement. Le taux de rétention simulé pendant la décharge est étudié et présente un accord qualitatif avec l'expérience In all plasma devices, a constant exchange of particle develops between the plasma and the wall. This phenomenon, referred to as recycling, is of critical interest for those reactors as, once the plasma is established, particle recycling represents the main particle source for the plasma. A complete understanding of the recycling phenomenon is therefore essential to ensure a reliable plasma density control and optimum performance. However, the in-situ experimental study of recycling remains challenging. Modelling can assist in the understanding of this phenomenon.The edge-plasma transport codes present the most-advanced description of the plasma-wall interaction. However, the description of recycling remains partial: atomic reflection is already handled while molecular desorption is set ad-hoc by the code user. This PhD focuses on the development of an extension of the SolEdge2D-EIRENE transport code, named D-WEE, whose goal is to model the dynamics of desorption.To initialise D-WEE, a sequence of plasma discharges is simulated with D-WEE to model a tokamak operation. The simulated wall dynamics during those discharges is studied, reveling some interesting behaviours that could impact the reactor operation. To assess the relevance of the simulated wall dynamics, a confrontation to post-pulse experimental pressure measurement is performed which reveals a qualitative agreement between the temporal pressure drop obtained in the simulation (with a t^{-0.8} trend) and the one observed experimentally under ILW configuration. The retention rate during the discharge is also studied and reproduces qualitatively the experimental trends

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Garrier, Sylvain. "Conception et simulation d'un réservoir d'hydrure de magnésium avec récupération de la chaleur de réaction à l'aide d'un matériau à changement de phase." Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00940452.

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La thèse porte sur la conception et la simulation d'un réservoir de stockage solide de l'hydrogène sous forme d'hydrure de magnésium (MgH2). La particularité du réservoir conçu réside dans sa capacité à stocker l'énergie d'absorption grâce à un matériau de changement de phase (MCP). Afin de pouvoir prouver la viabilité du système, une étude portant sur le comportement de l'hydrure de magnésium compacté lors du cyclage à été effectuée. Celle-ci montre qu'après 100 cycles, les cinétiques de réaction et les taux massiques de stockage d'hydrogène ne sont pas affectés. En revanche, un changement de morphologie important a été observé puisqu'une dilatation ainsi qu'une augmentation importante de la conductivité des matériaux composites ont été relevées. L'étude du MCP révéla l'importance de certains paramètres, en particulier la conductivité thermique et l'enthalpie de fusion. Le MCP sélectionné est un alliage métallique en composition eutectique. Celui ci est bon conducteur de chaleur, présente une enthalpie de fusion élevée et une stabilité de comportement thermique au cyclage. Le réservoir construit contient 10 kg d'hydrure de magnésium co-broyé + 5 % de Graphite Naturel Expansé. Il est capable de stocker 7000 NL d'hydrogène (625 g) en 3h. L'avantage principal du réservoir est son efficacité énergétique, puisque la chaleur stockée par le MCP à l'absorption est refournie lors de la désorption. Afin de pouvoir prédire les comportements thermiques et cinétiques des prochains réservoirs basés sur cette technologie, 2 modèles numériques utilisant Matlab et Fluent ont été développés et validés.

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Libros sobre el tema "Hydrogen recycling"

Wu, C. H., ed. Hydrogen Recycling at Plasma Facing Materials. Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4331-8.

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H, Wu C., North Atlantic Treaty Organization. Scientific Affairs Division., and NATO Advanced Research Workshop on Hydrogen Recycling at Plasma Facing Materials (1999 : Saint Petersburg, Russia), eds. Hydrogen recycling at plasma facing materials. Kluwer Academic, 2000.

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Wu, C. H. Hydrogen Recycling at Plasma Facing Materials. Springer Netherlands, 2000.

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Hassanein, Ahmed, ed. Hydrogen and Helium Recycling at Plasma Facing Materials. Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-010-0444-2.

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Mizuki, Nobuaki. Arumi-kei haikibutsu kara no arumi kōkōritsu kaishū gijutsu to, Hokuriku chihō ni tekishita suiso enerugī riyō shisutemu no kaihatsu: Heisei 21-nendo chikyū ondanka taisaku gijutsu kaihatsu jigyō seika hōkokusho. Tonami Unʼyu, 2010.

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NATO Advanced Research Workshop on Hydrogen Isotope Recycling at Plasma Facing Materials in Fusion Reactors (2001 Argonne, Ill.). Hydrogen and helium recycling at plasma facing materials: [proceedings of the NATO Advanced Research Workshop on Hydrogen Isotope Recycling at Plasma Facing Materials in Fusion Reactors, Argonne, Illinois, U.S.A., 22-24 August 2001]. Kluwer Academic, 2002.

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Wu, C. H. Hydrogen Recycling at Plasma Facing Materials. Springer, 2000.

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Hassanein, Ahmed. Hydrogen and Helium Recycling at Plasma Facing Materials. Springer, 2012.

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Hassanein, Ahmed. Hydrogen and Helium Recycling at Plasma Facing Materials. Springer, 2002.

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Hassanein, Ahmed. Hydrogen and Helium Recycling at Plasma Facing Materials: Mathematics, Physics and. Springer, 2002.

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Capítulos de libros sobre el tema "Hydrogen recycling"

Hashimoto, Koji. "Hydrogen as Fuel." In Global Carbon Dioxide Recycling. Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-8584-1_13.

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Tanabe, Tetsuo. "Fundamentals of Hydrogen Recycling." In Plasma-Material Interactions in a Controlled Fusion Reactor. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-0328-0_7.

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Denisov, E. A., T. N. Kompaniets, and A. A. Kurdyumov. "Atomic Hydrogen-Graphite Interaction." In Hydrogen Recycling at Plasma Facing Materials. Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4331-8_30.

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Hashimoto, Koji. "The Dream of a Hydrogen Energy-Based Society." In Global Carbon Dioxide Recycling. Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-8584-1_2.

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Loniuk, B. P. "Thermocycling in Gaseous Hydrogen as a way of the Hydrogen Degradation Acceleration." In Hydrogen Recycling at Plasma Facing Materials. Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4331-8_39.

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Tanabe, Tetsuo. "Recycled Hydrogen In Excited State." In Hydrogen Recycling at Plasma Facing Materials. Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4331-8_11.

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Gabis, I. E., E. A. Evard, and N. I. Sidorov. "Transport of Hydrogen Through Amorphous Alloy." In Hydrogen Recycling at Plasma Facing Materials. Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4331-8_15.

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Debnath, Biswajit, and Sadhan Kumar Ghosh. "Hydrogen Generation from Biorefinery Waste: Recent Advancements and Sustainability Perspectives." In Waste Valorisation and Recycling. Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-2784-1_53.

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Grisolia, C. "Density control and plasma wall interaction in Tore Supra." In Hydrogen Recycling at Plasma Facing Materials. Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4331-8_1.

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Bardamid, A. F., V. T. Gritsyna, V. G. Konovalov, et al. "Metal Surface Microrelief Formed Due to Sputtering By Mono- and Variable Energy Ions of Hydrogen Plasma." In Hydrogen Recycling at Plasma Facing Materials. Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4331-8_10.

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Actas de conferencias sobre el tema "Hydrogen recycling"

Marin, Florian, Oana Botoran, Simona Oancea, Marius Constantinescu, and Anca-Maria Zaharioiu. "RECYCLING OF BLACK LIQUOR WASTE FROM PULP FACTORIES AND THE DEVELOPMENT OF SUSTAINABLE FUELS." In 24th SGEM International Multidisciplinary Scientific GeoConference 24. STEF92 Technology, 2024. https://doi.org/10.5593/sgem2024/4.1/s18.40.

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The lignocellulosic biomass is produced worldwide in large quantities, which may contribute to environmental changes, global warming, wildfires, ocean and sea level rise. Recent research demonstrated efficacy of the thermal reconversion of black liquor, which represents a waste resulted from wood Kraft pulping, into gaseous (syngas), liquid (bio-oil) and solid (bio-char) final products through the pyrolysis process. This review describes the physical chemical and energy features of black liquor required for its valorization into fuels and valuable chemical compounds, the thermochemical process and the pyrolytic final products developed from such waste. The obtained syngas rich in hydrogen, methane, carbon dioxide and carbon monoxide can be directly used for energy purposes. In order to increase the energy values of the synthesis gas, as well as to reduce the negative impact on the environment, it is desirable to use it in mixtures, in different ratios, with natural gas, geothermal gas or biogas. The pyrolytic bio-oil can be used as an alternative fuel to fossil ones after refining. The pyrolytic bio-char has great potential for valorization into adsorbent materials for CO2 capture and storage, after a chemical activation process. The advantages of black liquor pyrolysis consist in the elimination of this waste regularly produced in considerable quantities for the development of alternative and renewable fuels that contain high levels of ecological carbon.

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Borisut, Prapatsorn, Bianca Williams, Aroonsri Nuchitprasittichai, and Selen Cremaschi. "Design and Optimization of Methanol Production using PyBOUND." In Foundations of Computer-Aided Process Design. PSE Press, 2024. http://dx.doi.org/10.69997/sct.194568.

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In this paper, we study the design optimization of methanol production with the goal of minimizing methanol production cost. One challenge of methanol production via carbon dioxide (CO2) hydrogenation is the reduction of operating costs. The simulation of methanol production is implemented within the Aspen HYSYS simulator. The feeds are pure hydrogen and captured CO2. The process simulation involves a single reactor and incorporates recycling at a ratio of 0.995. The methanol production cost is determined using an economic analysis. The cost includes capital and operating costs, which are determined through the equations and data from the capital equipment-costing program. The decision variables are the pressure and temperature of the reactor contents. The optimization problem is solved using a derivative-free algorithm, pyBOUND, a Python-based black-box model optimization algorithm that uses random forests (RFs) and multivariate adaptive regression splines (MARS). The predicted minimum methanol production cost by pyBOUND is $1396.56 per tonne of methanol, which corresponds to the pressure of 68.82 bar and temperature of 192.23�C while the actual cost is $1393.95 per tonne of methanol at these conditions. The cost breakdown of methanol production is 75% hydrogen price, 11% utility cost, 8% capital cost, 5% carbon dioxide price, and 1% operating cost.

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Uday, Vikram, and Sujit Jogwar. "Optimal Design of a Biogas-based Renewable Power Production System." In Foundations of Computer-Aided Process Design. PSE Press, 2024. http://dx.doi.org/10.69997/sct.194065.

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This paper presents optimal design for an energy-integrated biogas-fuel cell system for renewable electricity generation. The integrated process consists of two steps. The first step generates hydrogen from biogas via methane steam reforming (SMR), whereas the second step electrochemically converts this hydrogen into electricity using a solid oxide fuel cell (SOFC). These two steps are coupled via material and energy integration. Specifically, various design alternatives like anode and/or cathode gas recycling, biogas upgradation by CO2 removal, external versus direct internal reforming, and auxiliary power production through steam and/or micro gas turbine are explored to improve the overall efficiency and total annualized cost of the system. Specifically, a flowsheet superstructure is developed by incorporating all the available design alternatives. An optimal flowsheet with minimum total annualized cost is extracted from this superstructure using formal optimization techniques to meet the desired power target. Heat exchanger network superstructure is used to incorporate energy integration effectively. The proposed flowsheet and the corresponding optimal operating conditions are explained by analyzing the trade-offs associated with the corresponding design variables in terms of power production, capital expenditure, and utility consumption. For a power target of 300 kW, the proposed optimal energy-integrated process has a total annualized cost of $608,955/y with a net electrical efficiency of 67.1% and corresponds to electricity cost of $0.23/kWh.

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Rice, Rip G. "Byproducts of Ozonation Formed During Treatment of Water." In CORROSION 1993. NACE International, 1993. https://doi.org/10.5006/c1993-93479.

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ABSTRACT Ozone has been used commercially for the treatment of drinking water for nearly a century -- yet definitive studies identifying byproducts of organic and inorganic solutes have been conducted only within the past 15 years. In this paper, the author will present results of an extended literature survey on the subject, and extrapolate this information to what byproducts can be expected to form during ozonation of recycling cooling waters. In general, organic byproducts of ozone oxidation consist of aldehydes, acids, aldehyde-acids, keto-acids, polybasic-acids, and peroxides. Some of these materials, particularly the diacids, dialdehydes, keto-acids, and aldehyde- acids, can be expected to precipitate and/or chelate with polyvalent metal ions (calcium, aluminum, iron, magnesium), thus resulting in removal from solution. Inorganic byproducts include hydrogen peroxide, carbon dioxide (usually retained in solution as bicarbonate/carbonate ions), and nitrate ion. If bromide ion is present in the charge or makeup water, ozone is capable of rapidly converting this solute to hypobromous acid and hypobromite ion (free bromine), which can serve as an effective biocide in its own right. Free bromine also can react with organic solutes to produce bromoform and other bromine-containing organic materials. Hypobromite ion (but not hypobromous acid) can react further with ozone to produce bromate ion.

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Wentworth, Christy C., and Jeffrey F. Kramer. "A New High Performance Biguanide Polyammonium-Based Blend for Control of Microbiological Fouling in Oil and Gas Stimulation." In CORROSION 2021. AMPP, 2021. https://doi.org/10.5006/c2021-16556.

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Abstract Microbial fouling in oil and gas stimulation has been shown to cause a multitude of problems, including formation plugging, hydrogen sulfide (H2S) exposure, microbial induced corrosion, and well souring, all of which can have deleterious effects on well production and quality of oil and gas. In order to determine the most appropriate biocide to mitigate these issues, end users must take many factors into consideration, such as basic biocidal activity, fluid composition, environmental compatibility, and user safety. Additionally, with an increased reliance on recycling and reuse of flowback water, microbiological control in stimulation has become more challenging given the current market push for reduced use of fresh water. Recycled or higher solids waters can carry more bacteria, thus require higher treatment rates when using conventional non-oxidizing biocides. This paper presents a biguanide polyammonium-based blend biocide composed of polyhexamethylene biguanide and a polyquaternary ammonium compound that was designed to meet the performance and market challenges in the current oil and gas stimulation dynamic. Results showed that the biguanide polyammonium-based blend provided quick and persistent biocidal activity against a range of bacteria, including acid producing and sulfate reducing bacteria, at low concentrations, indicating effective biocidal capability. The biguanide polyammonium-based blend was also compatible with additives found in typical oil and gas stimulation fluid packages and worked over a broad range of pH, TDS, and temperatures, indicating broad fluid and environmental compatibility across oil and gas stimulation applications. In addition, there are no open pour restrictions, demonstrating that the biguanide polyammonium-based blend is safer to handle than other biocides. These results were verified in multiple oil and gas stimulation field assessments confirming the validity of the laboratory bench top evaluation.

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Dunbar, Zachary, Remko Aubert, Joost Van Ongeval, Tom Vandeweyer, and Eric Hendrickx. "Hydrogen recycling for EUV." In Optical and EUV Nanolithography XXXVI, edited by Anna Lio and Martin Burkhardt. SPIE, 2023. http://dx.doi.org/10.1117/12.2672627.

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Galeski, Henrique da Rosa, Renata Bachmann Guimarães Valt, Elan Gabriel Forteski, et al. "Hydrogen production from recycling blister packaging." In ROG.e Conference. IBP, 2024. http://dx.doi.org/10.48072/2525-7579.roge.2024.3645.

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Bacchetta, Gatien, Cyril Rado, and Sorana Luca. "Short-loop Recycling Of Sintered NdFeB Magnets By Hydrogen Decrepitation." In World Powder Metallurgy 2022 Congress & Exhibition. EPMA, 2022. http://dx.doi.org/10.59499/wp225370650.

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NdFeB permanent magnets are essential components for the rising green transition technologies including electric vehicles and wind turbines. These magnets contain critical Rare-Earth Elements involving strong supply risk and high environmental impacts. Their recycling is thus a key factor for a sustainable production.This study focuses on a short-loop recycling route based on the pulverization of end-of-life NdFeB magnets under hydrogen. The particle size distribution of the powders is affected by Hydrogen Decrepitation process conditions and is hereby proven to depend both on hydrogenation temperature and initial composition of the magnets. This study also emphasizes the interest of an appropriate thermal treatment on HD powders to recover their magnetic performances. It paves the way to a potential new recycling route of NdFeB permanent magnets for bonded magnets applications.

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PETTERS, STEFAN, DI KLAUS MAUTHNER, and KALVIN TSE. "CARBON RECYCLING AS AN ENABLER OF A RENEWABLE HYDROGEN ECONOMY." In ENERGY AND SUSTAINABILITY 2017. WIT Press, 2017. http://dx.doi.org/10.2495/esus170451.

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Mitrović, Stefan, Snežana Brković, Mina Seović, et al. "SUSTAINABLE METAL RECOVERY: CPU RECYCLING FOR ENHANCED HYDROGEN EVOLUTION REACTION." In 17th International Conference on Fundamental and Applied Aspects of Physical Chemistry. Society of Physical Chemists of Serbia, 2024. https://doi.org/10.46793/phys.chem24i.191m.

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This paper explores the feasibility and efficacy of employing whole CPU (Central Processing Unit) recycling as a sustainable source of metals for catalyst coatings in the Hydrogen Evolution Reaction (HER). With the escalating global issue of electronic waste (e-waste), repurposing discarded CPUs offers a promising avenue for metal recovery and utilization. Through systematic experimentation, CPU preparation technique was evaluated for formation of electrode catalytic layer and the kinetics of HER in alkaline media. The resulting electrodeposited cathode was assessed for electrocatalytic efficiency. Our findings highlight the potential of utilizing e-waste-derived metals, particularly gold and copper, as effective catalyst coatings for HER, thus contributing to sustainable metal recovery and utilization strategies.

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Informes sobre el tema "Hydrogen recycling"

Staudt, Rhonda. Final Technical Report for EE0006091: H2Pump Hydrogen Recycling System Demonstration. Office of Scientific and Technical Information (OSTI), 2017. http://dx.doi.org/10.2172/1344305.

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Wang, Jian-Hua. Transport of carbon ion test particles and hydrogen recycling in the plasma of the Columbia tokamak HBT'' (High Beta Tokamak). Office of Scientific and Technical Information (OSTI), 1990. http://dx.doi.org/10.2172/6473891.

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Rana B. Gupta. Water Recycling removal using temperature-sensitive hydronen. Office of Scientific and Technical Information (OSTI), 2002. http://dx.doi.org/10.2172/816026.

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Two laborers die from hydrogen sulfide exposure in a confined space at an organic waste recycling facility. U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, 2013. http://dx.doi.org/10.26616/nioshsface11ca008.

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