A5025306152- Fuel Cells and Related Materials
- Advanced battery technologies research
- Membrane-based Ion Separation Techniques
- Hybrid Renewable Energy Systems
- Advanced Battery Technologies Research
- Industrial Gas Emission Control
- Solar-Powered Water Purification Methods
- Quantum, superfluid, helium dynamics
- Spacecraft and Cryogenic Technologies
- Hydrogen Storage and Materials
- Advanced Battery Materials and Technologies
- Electrocatalysts for Energy Conversion
- Catalysts for Methane Reforming
University of South Carolina
2020-2023
Chiang Mai University
2017
The free but intermittent sources of energy such as photovoltaic and wind has become more popular nowadays. installation this type power source usually requires a secondary source, often the storage system battery to smoothen output over time. In article, we introduce, an alternative system, organic-electrolyte redox flow (RFB), which uses anthraquinone-2-sulfonic acid (AQS) 1,2-benzoquinone-3,5-disulfonic (BQDS) electrolytes. membrane is coated with Vulcan carbon using ultrasonic spray...
We demonstrate the use of para-polybenzimidazole (PBI) membranes as replacements for Nafion in aqueous HCl oxygen-depolarized electrolyzers. Both para-PBI and densified reduce cell voltage needed at 0.5 A cm–2 by ≥100 mV. examine effect HCl(aq) flow rate, back-pressure, electrolyzer temperature, and, membranes, H3PO4 swell time on performance. Increased proton conductivity, measured reduced area-specific membrane resistance, is identified primary mechanism to explain improved performance...
We report the development of an experimentally-validated computational fluid dynamics (CFD) model for simulation anhydrous HCl electrolyzer. The experimental data from 3 membrane variants was used to provide kinetic and parameters model. not only accurately simulates overall electrolyzer performance, but it also provides key insights into transport phenomena within allows like high flowrates increased cell pressure that pose a safety risk researchers. shows hotspots in temperature...
Electrochemical remediation of industrial waste products represents an economically attractive method to continuously convert streams high value products. has been more limited for processes that are very dry, acidic, or a combination both, because the most widely used polymer membranes (for example, Nafion™) need external humidification maintain conductivity. We show para -polybenzimidazole (PBI) can be as effective membrane separator in these types harsh environments, improving performance...
Chlorine is an important chemical used in many everyday products 1 . Most Cl 2 has been produced from brine by the chlor-alkaline process, which also produces NaOH and H as byproducts 2,3 Not only can process produce , but be generated electrolysis of HCl. Polybenzimidazole (PBI) membranes, are high temperature proton exchange have shown to decrease cell potential oxygen depolarized cathode (ODC) HCl electrolyzer compared Nafion membrane 4,5 Because PBI membranes acid-tolerant do not require...
Electrolysis of HCl exhibits promise for large-scale production hydrogen with the additional benefit converting a low-value byproduct (HCl) into more valuable feedstock (Cl 2 ). However, most available publications in literature use aqueous phase as electrolyte [1-3]. Previously, gas bromide (HBr) was shown to electrolyze at current densities an order magnitude greater than that HBr [4]. Aqueous electrolysis limited by slow diffusion liquid phase. We show here also higher reactions rates,...
Chlorine (Cl 2 ) is an important feedstock used in a variety of industry processes [1]. Hydrogen (H and chlorine gas can be produced by the electrochemical oxidation hydrogen chloride (HCl) anhydrous gas. Previously, phase bromine (HBr) electrolyzer showed better performance than aqueous due to significant increase reactant diffusion rate [2-5]. Furthermore, sulfonated polybenzimidazole (s-PBI) membranes have shown promising this application because they operated strong acid environments at...
Chlorine (Cl 2 ) is a fundamental feedstock material for the chemical industry, and chlorine-derived products contribute more than $46 billion to US economy annually. plays major role in many applications such as clean drinking water, pharmaceuticals, crop protection chemicals. Most chlorine produced from electrolysis of brine 1 . can also be hydrochloric acid by electrolysis. There are two primary techniques recycle HCl Cl via electrolysis--a diaphragm cell, which has advantage generating H...