The Experts below are selected from a list of 324 Experts worldwide ranked by ideXlab platform
Anton Friedl - One of the best experts on this subject based on the ideXlab platform.
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Renewable hydrogen production: a technical evaluation based on process simulation
Journal of Cleaner Production, 2010Co-Authors: Angela Miltner, Walter Wukovits, Tobias Pröll, Anton FriedlAbstract:Abstract An evaluation of different hydrogen production technologies based on renewable raw materials and/or renewable energy is presented. The evaluation comprises Alkaline Electrolysis, steam reforming of both biogas and gasification gas, the coupled dark and photo fermentation as well as the coupled dark and biogas fermentation. Each technology is investigated with different plant layouts and/or different raw materials. All examined technologies are designed to produce hydrogen in a quality suitable for the use in mobile fuel cells. The presented evaluation is based on the hydrogen production efficiency and the energy efficiency of the processes.
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Renewable hydrogen production: A technical evaluation based on process simulation
Journal of Cleaner Production, 2010Co-Authors: Angela Miltner, Walter Wukovits, Tobias Pröll, Anton FriedlAbstract:An evaluation of different hydrogen production technologies based on renewable raw materials and/or renewable energy is presented. The evaluation comprises Alkaline Electrolysis, steam reforming of both biogas and gasification gas, the coupled dark and photo fermentation as well as the coupled dark and biogas fermentation. Each technology is investigated with different plant layouts and/or different raw materials. All examined technologies are designed to produce hydrogen in a quality suitable for the use in mobile fuel cells. The presented evaluation is based on the hydrogen production efficiency and the energy efficiency of the processes © 2010 Elsevier Ltd. All rights reserved.
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Evaluation of sustainable hydrogen production pathways
Chemical Engineering, 2009Co-Authors: Angela Miltner, Anton Friedl, Walter WukovitsAbstract:The present paper evaluates different hydrogen production technologies based on renewable energy and/or renewable raw materials. The investigated technologies are Alkaline Electrolysis, steam reforming of biogas, steam reforming of gasification gas, the coupled dark and photo fermentation as well as the coupled dark and biogas fermentation. Furthermore the steam reforming of natural gas has been included in the analysis as a reference technology. Each technology has been investigated with different plant layouts and/or different raw materials. All examined technologies are designed to produce hydrogen in a quality that is suitable for the use in mobile fuels cells. The presented evaluation is based on the production efficiency and on the energy efficiency of the different processes. Copyright © 2009, AIDIC Servizi S. r. l.,.
Angela Miltner - One of the best experts on this subject based on the ideXlab platform.
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Renewable hydrogen production: a technical evaluation based on process simulation
Journal of Cleaner Production, 2010Co-Authors: Angela Miltner, Walter Wukovits, Tobias Pröll, Anton FriedlAbstract:Abstract An evaluation of different hydrogen production technologies based on renewable raw materials and/or renewable energy is presented. The evaluation comprises Alkaline Electrolysis, steam reforming of both biogas and gasification gas, the coupled dark and photo fermentation as well as the coupled dark and biogas fermentation. Each technology is investigated with different plant layouts and/or different raw materials. All examined technologies are designed to produce hydrogen in a quality suitable for the use in mobile fuel cells. The presented evaluation is based on the hydrogen production efficiency and the energy efficiency of the processes.
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Renewable hydrogen production: A technical evaluation based on process simulation
Journal of Cleaner Production, 2010Co-Authors: Angela Miltner, Walter Wukovits, Tobias Pröll, Anton FriedlAbstract:An evaluation of different hydrogen production technologies based on renewable raw materials and/or renewable energy is presented. The evaluation comprises Alkaline Electrolysis, steam reforming of both biogas and gasification gas, the coupled dark and photo fermentation as well as the coupled dark and biogas fermentation. Each technology is investigated with different plant layouts and/or different raw materials. All examined technologies are designed to produce hydrogen in a quality suitable for the use in mobile fuel cells. The presented evaluation is based on the hydrogen production efficiency and the energy efficiency of the processes © 2010 Elsevier Ltd. All rights reserved.
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Evaluation of sustainable hydrogen production pathways
Chemical Engineering, 2009Co-Authors: Angela Miltner, Anton Friedl, Walter WukovitsAbstract:The present paper evaluates different hydrogen production technologies based on renewable energy and/or renewable raw materials. The investigated technologies are Alkaline Electrolysis, steam reforming of biogas, steam reforming of gasification gas, the coupled dark and photo fermentation as well as the coupled dark and biogas fermentation. Furthermore the steam reforming of natural gas has been included in the analysis as a reference technology. Each technology has been investigated with different plant layouts and/or different raw materials. All examined technologies are designed to produce hydrogen in a quality that is suitable for the use in mobile fuels cells. The presented evaluation is based on the production efficiency and on the energy efficiency of the different processes. Copyright © 2009, AIDIC Servizi S. r. l.,.
Walter Wukovits - One of the best experts on this subject based on the ideXlab platform.
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Renewable hydrogen production: a technical evaluation based on process simulation
Journal of Cleaner Production, 2010Co-Authors: Angela Miltner, Walter Wukovits, Tobias Pröll, Anton FriedlAbstract:Abstract An evaluation of different hydrogen production technologies based on renewable raw materials and/or renewable energy is presented. The evaluation comprises Alkaline Electrolysis, steam reforming of both biogas and gasification gas, the coupled dark and photo fermentation as well as the coupled dark and biogas fermentation. Each technology is investigated with different plant layouts and/or different raw materials. All examined technologies are designed to produce hydrogen in a quality suitable for the use in mobile fuel cells. The presented evaluation is based on the hydrogen production efficiency and the energy efficiency of the processes.
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Renewable hydrogen production: A technical evaluation based on process simulation
Journal of Cleaner Production, 2010Co-Authors: Angela Miltner, Walter Wukovits, Tobias Pröll, Anton FriedlAbstract:An evaluation of different hydrogen production technologies based on renewable raw materials and/or renewable energy is presented. The evaluation comprises Alkaline Electrolysis, steam reforming of both biogas and gasification gas, the coupled dark and photo fermentation as well as the coupled dark and biogas fermentation. Each technology is investigated with different plant layouts and/or different raw materials. All examined technologies are designed to produce hydrogen in a quality suitable for the use in mobile fuel cells. The presented evaluation is based on the hydrogen production efficiency and the energy efficiency of the processes © 2010 Elsevier Ltd. All rights reserved.
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Evaluation of sustainable hydrogen production pathways
Chemical Engineering, 2009Co-Authors: Angela Miltner, Anton Friedl, Walter WukovitsAbstract:The present paper evaluates different hydrogen production technologies based on renewable energy and/or renewable raw materials. The investigated technologies are Alkaline Electrolysis, steam reforming of biogas, steam reforming of gasification gas, the coupled dark and photo fermentation as well as the coupled dark and biogas fermentation. Furthermore the steam reforming of natural gas has been included in the analysis as a reference technology. Each technology has been investigated with different plant layouts and/or different raw materials. All examined technologies are designed to produce hydrogen in a quality that is suitable for the use in mobile fuels cells. The presented evaluation is based on the production efficiency and on the energy efficiency of the different processes. Copyright © 2009, AIDIC Servizi S. r. l.,.
Charles W Dunnill - One of the best experts on this subject based on the ideXlab platform.
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Raney Nickel 2.0: Development of a high-performance bifunctional electrocatalyst
Electrochimica Acta, 2019Co-Authors: William J. F. Gannon, Charles W DunnillAbstract:Abstract As a catalytic coating for Alkaline Electrolysis Raney Nickel is one of the most efficient materials discovered, based largely on the activity of nickel and the porosity of the alloy after leaching. This study improves the electrochemical and corrosion performance of the coating for both hydrogen and oxygen evolution in Alkaline water-splitting Electrolysis through the use during electrodeposition of a sacrificial stainless-steel counter electrode. Analysis using energy dispersive X-ray (EDX) and scanning electron microscopy (SEM) revealed that the although the elemental make-up is largely similar, the morphology is transformed. Through measurements of the electrochemical surface area (ECSA) after long-term intermittent ageing it was found that the surface area was increased by a factor of six. Assessments and comparisons of the electrochemical performance using 3-electrode chronopotentiometry confirm this is one of the most active bifunctional coatings known.
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Enhanced Lifetime Cathode for Alkaline Electrolysis Using Standard Commercial Titanium Nitride Coatings
Processes, 2019Co-Authors: William J. F. Gannon, Daniel R Jones, Charles W DunnillAbstract:The use of hydrogen gas as a means of decoupling supply from demand is crucial for the transition to carbon-neutral energy sources and a greener, more distributed energy landscape. This work shows how simple commercially available titanium nitride coatings can be used to extend the lifetime of 316 grade stainless-steel electrodes for use as the cathode in an Alkaline Electrolysis cell. The material was subjected to accelerated ageing, with the specific aim of assessing the coating’s suitability for use with intermittent renewable energy sources. Over 2000 cycles lasting 5.5 days, an electrolytic cell featuring the coating outperformed a control cell by 250 mV, and a reduction of overpotential at the cathode of 400 mV was observed. This work also confirms that the coating is solely suitable for cathodic use and presents an analysis of the surface changes that occur if it is used anodically.
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minimising the ohmic resistance of an Alkaline Electrolysis cell through effective cell design
International Journal of Hydrogen Energy, 2017Co-Authors: Robert Phillips, Adam Edwards, Bertrand Rome, Daniel R Jones, Charles W DunnillAbstract:Abstract The efficiency of an Alkaline Electrolysis cell depends strongly on its internal cell resistance, which becomes the dominant efficiency driver at high current densities. This paper uses Electrochemical Impedance Spectroscopy to decouple the ohmic resistance from the cell voltage, and, for the first time, quantify the reduction in cell resistance achieved by employing a zero gap cell configuration when compared to the conventional approach. A 30% reduction in ohmic resistance is demonstrated for the zero gap cell when compared to a more conventional design with a 2 mm electrode gap (in 1 M NaOH and at standard conditions). The effect on the ohmic resistance of operating parameters, including current density and temperature, is quantified; the zero gap cell outperforms the standard cell at all current densities, particularly above 500 mA·cm −2 Furthermore, the effect of electrode morphology on the ohmic resistance is investigated, showing that high surface area foam electrodes permit a lower ohmic resistance than coarser mesh electrodes. These results show that zero gap cell design will allow both low cost and highly efficient Alkaline Electrolysis, which will become a key technology for short term and inter-seasonal energy storage and accelerate the transition towards a decarbonised society.
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zero gap Alkaline Electrolysis cell design for renewable energy storage as hydrogen gas
RSC Advances, 2016Co-Authors: Robert Phillips, Charles W DunnillAbstract:Zero gap Alkaline electrolysers hold the key to cheap and efficient renewable energy storage via the production and distribution of hydrogen gas. A zero gap design, where porous electrodes are spacially separated only by the gas separator, allows the unique benefits of Alkaline Electrolysis to be combined with the high efficiencies currently only associated with the more expensive PEM set-up. This review covers the basics of Alkaline Electrolysis, and provides a detailed description of the advantages of employing a zero gap cell design over the traditional arrangement. A comparison with different types of zero gap cell designs currently seen in research is made, and a description of recent developments is presented. Finally, the current state of research into zero gap Alkaline Electrolysis is discussed, and pathways for future research identified. Zero gap Alkaline Electrolysis will allow excess renewable energy to be stored, transported and used on demand in a green and environmentally friendly manner as when the hydrogen is burnt or passed into a fuel cell it produces only water and energy.
Sacha R.a. Kersten - One of the best experts on this subject based on the ideXlab platform.
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Power-to-Gas: storing surplus electrical energy. A design study
Energy Procedia, 2020Co-Authors: O. S. Buchholz, R. Veneman, Derk Willem Frederik Brilman, Sacha R.a. KerstenAbstract:In this work a conceptual design of a Power-to-Gas (PtG) process for storing electrical energy in form of synthetic natural gas (SNG) of gas grid quality H is presented. The combination with a conventional lignite fired power plant (LPP) was investigated for possible improvement of its economic performance in times of fluctuating renewable energy supply. In this study for a PtG facility using 80 MWel (10% of LPP nominal capacity) a capital expenditure (CAPEX) of M$ 126 and operational (OPEX) of 31-33 M$/a were estimated. PtG provides a good alternative for storing surplus electrical energy and guaranteeing a viable LPP operation if the remuneration for the flexible operation is above 45 k$/operating hour respectively 56 $/operating hour/MWel which is at least 50% additional operational&maintenance (O&M) costs for a LPP. With decreasing Alkaline Electrolysis costs and an increasing share of renewable energy supply this concept would represent an energy strategic as well as economic advantage for energy suppliers in future
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Power-to-Gas: Storing surplus electrical energy a design study
Energy Procedia, 2014Co-Authors: O. S. Buchholz, R. Veneman, A.g.j. Van Der Ham, Derk Willem Frederik Brilman, Sacha R.a. KerstenAbstract:In this work a conceptual design of a Powcr-to-Gas (PtG) process for storing clcctrical energy in form of synthetic natural gas (SNG) of gas grid quality H is presented. The combination with a conventional lignite fired power plant (LPP) was investigated for possible improvement of its economic performance in times of fluctuating renewable energy supply. In this study for a PtG facility using 80 MW{| (10% of LPP nominal capacity) a capital expenditure (CAPEX) of M$ 126 and operational (OPEX) of 31-33 M$/a were estimated. PtG provides a good alternative for storing surplus clcctrical energy and guaranteeing a viable LPP operation if the remuneration for the flexible operation is above 45 kS'opcrating hour respectively 56 S'operating hour.'MWe) which is at least 50% additional opcrational&maintcnancc (O&M) costs for a LPP. With decreasing Alkaline Electrolysis costs and an increasing share of renewable energy supply this concept would represent an energy strategic as well as economic advantage for energy suppliers in ftiture.
