RK
Authored
10 records found
Electrochemical CO<sub>2</sub> Reduction on Copper in Propylene Carbonate
Influence of Water Content and Temperature on the Product Distribution
Aqueous electrolytes are most commonly used for the CO2 reduction reaction (CO2RR), but suffer from a low CO2 solubility that limits the reaction. Electrochemical CO2 reduction in nonaqueous electrolytes can provide a solution, due to the higher CO2 solubility of organic solvent-
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Benchmarking the Electrochemical CO<sub>2</sub> Reduction on Polycrystalline Copper Foils
The Importance of Microstructure Versus Applied Potential
Copper is one of the most promising catalysts for the CO2 reduction reaction (CO2RR) due to its unique capability of producing multicarbon products in appreciable quantities. Most of the CO2RR research efforts have been directed towards the development of new electrocatalysts to
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Revisiting the Electrochemical Nitrogen Reduction on Molybdenum and Iron Carbides
Promising Catalysts or False Positives?
The electrochemical dinitrogen reduction reaction (NRR) has recently gained much interest as it can potentially produce ammonia from renewable intermittent electricity and replace the Haber-Bosch process. Previous literature studies report Fe- and Mo-carbides as promising electro
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Ultrasound-promoted preparation of polyvinyl ferrocene-based electrodes for selective formate separation
Experimental design and optimization
The selective separation of ions is a major technological challenge having far-ranging impacts from product separation in electrochemical production of base chemicals from CO2 to water purification. In recent years, ion-selective electrochemical systems leveraging redox-materials
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Towards Higher NH<sub>3</sub> Faradaic Efficiency
Selective-Poisoning of HER Active Sites by Co-Feeding CO in NO Electroreduction**
Direct electroreduction of nitric oxide offers a promising avenue to produce valuable chemicals, such as ammonia, which is an essential chemical to produce fertilizers. Direct ammonia synthesis from NO in a polymer electrolyte membrane (PEM) electrolyzer is advantageous for its c
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Electrochemical Reduction of CO<sub>2</sub>to Oxalic Acid
Experiments, Process Modeling, and Economics
We performed H-cell and flow cell experiments to study the electrochemical reduction of CO2 to oxalic acid (OA) on a lead (Pb) cathode in various nonaqueous solvents. The effects of anolyte, catholyte, supporting electrolyte, temperature, water content, and cathode potential on t
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Electroreduction of CO<sub>2</sub>/CO to C<sub>2</sub>Products
Process Modeling, Downstream Separation, System Integration, and Economic Analysis
Direct electrochemical reduction of CO2 to C2 products such as ethylene is more efficient in alkaline media, but it suffers from parasitic loss of reactants due to (bi)carbonate formation. A two-step process where the CO2 is first electrochemically reduced to CO and subsequently
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Sn-Based Electrocatalyst Stability
A Crucial Piece to the Puzzle for the Electrochemical CO<sub>2</sub>Reduction toward Formic Acid
Nowadays, Sn-based electrocatalysts for the electrochemical CO2 reduction reaction (eCO2RR) toward formic acid have been reported to reach industrially relevant current densities and Faradaic efficiencies approaching 100%. However, electrocatalyst stability remains inadequate and
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Electrochemical CO2 reduction has received an increased amount of interest in the last decade as a promising avenue for storing renewable electricity in chemical bonds. Despite considerable progress on catalyst performance using nanostructured electrodes, the sensitivity of the r
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Electrochemical CO2 capture is promising for closing the carbon cycle but needs technological advances. In a recent issue of Nature Energy, a novel chemistry for electrochemical CO2 capture is presented, demonstrating low energy consumption and high purity with virtually no degra
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Contributed
10 records found
Syngas Purification
Design of a Rectisol® based purification plant for the removal of impurities and simultaneous capture of CO<sub>2</sub> from the works arising gases of an integrated steel mill
The steel making industry is highly energy intensive and a great contributor of greenhouse gas (GHG) emissions. It generated between 7% and 9% of direct emissions from the global use of fossil fuels in 2017 [1]. Gas emissions in an integrated steel mill (ISM) arise mainly from th
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Study of Hydrogen Sorption/Desorption Effect on Austenitic Iron-Based Alloys
Surface Interaction Studied by Cyclic Voltammetry on 304L Stainless Steel and Invar
The so-called “hydrogen economy” became one of the scientific targets among the different renewable energies alternatives, as a result of the efforts to transition from fossil fuels to environmentally-friendly energy sources. In this context, various options to transport and stor
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Offshore wind + Energy Storage
Selection and design of energy storage for the integration of offshore wind energy in the future Dutch electricity system
The Dutch government has set out to largely reach reductions in carbon emissions in the electricity sector with the utilization of offshore wind energy. Due to the intermittency of wind energy this poses new problems and challenges for the future electricity system in the Netherl
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An Electrochemical Ammonia Synthesis Process
Process Model and Design of a Medium Scale Electrochemical Ammonia Production Plant
One of the greatest concerns of this century is climate change due to rising greenhouse gas emissions. The ammonia industry is responsible for 1.4% of the global CO2 emissions, thereby having a negative climate impact. However, ammonia is an essential ingredient in nitrogen ferti
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Effects of pressure on a sequential cascade system for electrochemcial CO2 reduction
A mathematical model and preliminary design
Within the electricity driven conversion methods, electrocatalysis has been assessed to be the closest to commercialisation. This can only be realised, if the system efficiency is increased in terms of the reaction rate, onset potential and/or selectivity. Current research has sh
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Power to methane to power
Performance analysis of a closed loop energy storage system
Reducing carbon emissions in the power generation sector can be done by generating energy from renewable sources such as wind and sun. However these sources alone cannot provide a reliable electricity system and therefore an energy storage system is needed. Power-to-gas is a conc
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Ex-ante viability of wonder nanomaterials from waste CO2
An ex-ante techno-economic and environmental assessment of CO2 based carbon nanomaterial production and comparison with status quo
The primary objective of this study was to address the lack of understanding of the commercial- scale implementation of novel CO2 based carbon nanomaterial (CNM) production and its comparison with status quo CNM production processes using unsustainable fossil resources. To accomp
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Electrochemical Ammonia Synthesis
Development of a Cell With a Hydrogen Permeable Electrode
Ammonia is essential for global food production as a component of fertiliser, and a potential energy carrier in the energy transition. Electrochemical ammonia synthesis faces numerous challenges as an alternative to the carbon intensive Haber-Bosch process, including competition
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Towards upscaling the Battolyser- An Integrated Ni-Fe Alkaline Battery and Electrolyser
A combined modeling and experimental study
Electrochemical cells and systems have been around for a few centuries. Lately, these technologies have been attracting attention. Although the technology to generate electricity from renewable sources is well developed and widely available -such as photovoltaic and wind energy-
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The rise of CO2 concentration in the atmosphere is a leading cause of global warming. Utilizing CO2 ob- tained from point sources, such as chemical industries, as a feedstock to produce high energy density fuels and chemicals could mitigate the emission of CO2 as well as provide
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