While the human race will always leave its carbon footprint on the Earth, it must continue to find ways to lessen the impact of its fossil fuel consumption.
“Carbon capture” technologies – chemically trapping carbon dioxide before it is released into the atmosphere – is one approach. In a recent study, Cornell University researchers disclose a novel method for capturing the greenhouse gas and converting it to a useful product – while producing electrical energy.
Lynden Archer, the James A. Friend Family Distinguished Professor of Engineering, and doctoral student Wajdi Al Sadat have developed an oxygen-assisted aluminum/carbon dioxide power cell that uses electrochemical reactions to both sequester the carbon dioxide and produce electricity.
Their paper, “The O2-assisted Al/CO2 electrochemical cell: A system for CO2capture/conversion and electric power generation,” was published July 20 in Science Advances.
The group’s proposed cell would use aluminum as the anode and mixed streams of carbon dioxide and oxygen as the active ingredients of the cathode. The electrochemical reactions between the anode and the cathode would sequester the carbon dioxide into carbon-rich compounds while also producing electricity and a valuable oxalate as a byproduct.
In most current carbon-capture models, the carbon is captured in fluids or solids, which are then heated or depressurized to release the carbon dioxide. The concentrated gas must then be compressed and transported to industries able to reuse it, or sequestered underground. The findings in the study represent a possible paradigm shift, Archer said.
“The fact that we’ve designed a carbon capture technology that also generates electricity is, in and of itself, important,” he said. “One of the roadblocks to adopting current carbon dioxide capture technology in electric power plants is that the regeneration of the fluids used for capturing carbon dioxide utilize as much as 25 percent of the energy output of the plant. This seriously limits commercial viability of such technology. Additionally, the captured carbon dioxide must be transported to sites where it can be sequestered or reused, which requires new infrastructure.”
The group reported that their electrochemical cell generated 13 ampere hours per gram of porous carbon (as the cathode) at a discharge potential of around 1.4 volts. The energy produced by the cell is comparable to that produced by the highest energy-density battery systems.
Another key aspect of their findings, Archer says, is in the generation of superoxide intermediates, which are formed when the dioxide is reduced at the cathode. The superoxide reacts with the normally inert carbon dioxide, forming a carbon-carbon oxalate that is widely used in many industries, including pharmaceutical, fiber and metal smelting.
“A process able to convert carbon dioxide into a more reactive molecule such as an oxalate that contains two carbons opens up a cascade of reaction processes that can be used to synthesize a variety of products,” Archer said, noting that the configuration of the electrochemical cell will be dependent on the product one chooses to make from the oxalate.
Al Sadat, who worked on onboard carbon capture vehicles at Saudi Aramco, said this technology in not limited to power-plant applications. “It fits really well with onboard capture in vehicles,” he said, “especially if you think of an internal combustion engine and an auxiliary system that relies on electrical power.”
He said aluminum is the perfect anode for this cell, as it is plentiful, safer than other high-energy density metals and lower in cost than other potential materials (lithium, sodium) while having comparable energy density to lithium. He added that many aluminum plants are already incorporating some sort of power-generation facility into their operations, so this technology could assist in both power generation and reducing carbon emissions.
A current drawback of this technology is that the electrolyte – the liquid connecting the anode to the cathode – is extremely sensitive to water. Ongoing work is addressing the performance of electrochemical systems and the use of electrolytes that are less water-sensitive.
The Latest on: Electrochemical cell
via Google News
The Latest on: Electrochemical cell
- Hyundai’s Nexo makes a case for fuel-cell SUVs on February 19, 2019 at 7:00 am
The future of hydrogen fuel cell cars is still in doubt ... the power you wanted off the light while helping supplement the driving force produced by the electrochemical reaction of the hydrogen and a... […]
- Solid Oxide Fuel Cell (SOFC) Market Grow with a CAGR of 13.3% illuminated by new report on February 19, 2019 at 1:19 am
#Download Sample Pages of Report @ www.reportsnreports.com/contacts/r…aspx?name=1838918 A solid oxide fuel cell (or SOFC) is an electrochemical conversion device that produces electricity directly fro... […]
- Membrane charge and lipid packing determine polymyxin-induced membrane damage on February 18, 2019 at 5:28 pm
To confirm the formation of defects in the membranes due to the addition of PmB, Cyclic Voltammetry (CV) measurements were done using a three-electrode electrochemical cell. The lipid membranes were a... […]
- Hydrogen and Fuel Cells Market Research Report is expected to grow with the CAGR of approximately 25.09%, during the forecast period on February 18, 2019 at 5:35 am
Sample Request @ www.marketresearchfuture.com/sample_request/5947 A fuel cell is an electrochemical device, which combines hydrogen with oxygen so as generate electricity, heat and water. The fuel cel... […]
- New possibilities for light-emitting plastics with patterned light on February 13, 2019 at 4:40 am
In his thesis, Ph. D. candidate Mattias Lindh, who has studied the operation of light-emitting electrochemical cells, shows that the precise thickness of a film of light-emitting plastics is ... […]
- Global Membrane Electrode Assemblies market challenges illuminated by new report on February 11, 2019 at 11:20 pm
News from QY Research, Inc. The Membrane Electrode Assembly (MEA) is the core component of a fuel cell that helps produce the electrochemical reaction needed to separate electrons. On the anode side o... […]
- Companies in the Global Fuel Cell for Data Center Market Resorting to Product Innvoation to Stay Ahead in the Game on February 11, 2019 at 8:46 pm
One of such prime technology as a renewable source of energy is fuel cell. A fuel cell generates electricity using an electrochemical reaction, not combustion, and depending on the fuel source, produc... […]
- Fuel Cell Market to Gain Enhanced Growth till 2025 | Hexa Research on February 11, 2019 at 4:22 am
North America is expected to witness robust growth in the years to come. The U.S. is a key contributor to regional growth due to increasing demand for such electrochemical cells, which could be attrib... […]
- Fluidic Microchannel Identifies Electricity-Producing Bacteria on February 8, 2019 at 12:30 pm
The MIT team’s approach differs significantly from existing time-consuming techniques that probe the bacteria’s electrochemical activity. Such methods involve growing large batches of cells and measur... […]
- €500,000 available in Metalysis and ESA space exploration competition on January 21, 2019 at 4:06 am
The competition is to design a process-monitoring system that works with Metalysis’s existing electrochemical cells. These cells convert refined oxides and ores into metal alloy powders, including tho... […]
via Bing News