A Demonstration of Carbon-Assisted Water Electrolysis

Ewan, B. C. R.; Adeniyi, Olalekan David

doi:10.3390/en6031657

Cited by 18 publications

(7 citation statements)

References 13 publications

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“…Thus, the remaining 2/3rd of the energy would be supplied from the chemical energy of carbon. The carbon-assisted electrolysis carried out at higher temperatures can result in further reduction in the required electric energy input due to increased thermal energy contribution into the process by lowering the thermo-neutral voltage further (Seehra and Bollineni, 2009 ; Ewan and Adeniyi, 2013 ). Figure 5 schematically shows the electrochemical reactions involved for carbon-assisted electrolysis carried out at temperature <100°C (LT) employing a proton conducting electrolyte membrane, and at HTs (>800°C) employing an oxygen ion conducting ceramic electrolyte such as yttria or scandia stabilized zirconia.…”

Section: Hydrogen Production Technologiesmentioning

confidence: 99%

“…While the hydrogen generation by carbon-assisted electrolysis clearly offers significant advantages, the area is largely unexplored. Most of the investigations have been performed with sulfuric acid as the electrolyte and at temperatures below 100°C (Seehra and Bollineni, 2009 ; Hesenov et al, 2011 ; Ewan and Adeniyi, 2013 ). The current densities achieved are very low due to the slow carbon oxidation kinetics at LTs, and formation of films on the surface (such as illite, siderite, carbonate, etc.)…”

Section: Hydrogen Production Technologiesmentioning

confidence: 99%

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Emerging electrochemical energy conversion and storage technologies

et al. 2014

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Electrochemical cells and systems play a key role in a wide range of industry sectors. These devices are critical enabling technologies for renewable energy; energy management, conservation, and storage; pollution control/monitoring; and greenhouse gas reduction. A large number of electrochemical energy technologies have been developed in the past. These systems continue to be optimized in terms of cost, life time, and performance, leading to their continued expansion into existing and emerging market sectors. The more established technologies such as deep-cycle batteries and sensors are being joined by emerging technologies such as fuel cells, large format lithium-ion batteries, electrochemical reactors; ion transport membranes and supercapacitors. This growing demand (multi billion dollars) for electrochemical energy systems along with the increasing maturity of a number of technologies is having a significant effect on the global research and development effort which is increasing in both in size and depth. A number of new technologies, which will have substantial impact on the environment and the way we produce and utilize energy, are under development. This paper presents an overview of several emerging electrochemical energy technologies along with a discussion some of the key technical challenges.

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Section: Hydrogen Production Technologiesmentioning

confidence: 99%

Section: Hydrogen Production Technologiesmentioning

confidence: 99%

Emerging electrochemical energy conversion and storage technologies

et al. 2014

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“…Noticeably, above certain temperature, carbon-based solid oxide steam electrolysis process can occur spontaneously without input of external electricity. The feasibility of steam-carbon solid oxide electrochemical cells for hydrogen production has been reported [31][32][33]. However, the feasibility of syngas production has not been reported yet for carbon assisted SOECs.…”

Section: Introductionmentioning

confidence: 99%

Efficient syngas generation for electricity storage through carbon gasification assisted solid oxide co-electrolysis

et al. 2016

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High temperature CO 2 and H 2 O co-electrolysis is a promising way to produce syngas for the storage of electrical energy harvested from renewable energy sources. However, a significant portion of electricity input is consumed to overcome a large oxygen potential gradient between the electrodes in conventional solid oxide electrolysis cells (SOECs). In this study, we present a novel and efficient syngas generator integrating carbon gasification and solid oxide co-electrolysis to improve the system efficiency. The feasibility of this new system is demonstrated in La 0.9 Sr 0.1 Ga 0.8 Mg 0.2 O 3 (LSGM) electrolyte-supported SOECs. Both thermodynamic calculation and experimental results show that the potential barrier for co-electrolysis can be reduced by about 1 V and the electricity input can be saved by more than 90% upon integration of SOECs with carbon gasification. On the anode side, "CO shuttle" between the electrochemical reaction sites and solid carbon is realized through the Boudouard reaction (C+CO 2 =2CO). Simultaneous production of CO on the anode side and CO/H 2 on the cathode side generates syngas that can serve as fuel for power generation or feedstock for chemical plants. The integration of carbon gasification and SOECs provides a potential pathway for efficient utilization of electricity, coal/biomass, and CO 2 to store electrical energy, produce clean fuel, and achieve a carbon neutral sustainable energy supply.

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“…It has vast volume, so there is need to compact rice husk and then to use it [22]. Several researchers studied the renewable energy and power generations for example see [23][24][25][26][27][28][29][30], all of them discussed and resulted renewable energy potential, opportunities and usage in one or another way. Poultry waste is a perfect subtract to prepare biogas.…”

Section: Introductionmentioning

confidence: 99%