March 5, 2024

Game-Changing Carbon Capture Technology To Remove 99% of CO2 From Air

The research study group, led by UD Professor Yushan Yan, reported their approach in Nature Energy on Thursday, February 3.
Game-changing tech for fuel cell efficiency
Fuel cells work by converting fuel chemical energy directly into electrical power. They can be used in transportation for things like hybrid or zero-emission lorries.
Yan, Henry Belin du Pont Chair of Chemical and Biomolecular Engineering, has actually been working for some time to improve hydroxide exchange membrane (HEM) fuel cells, a cost-effective and environmentally friendly option to standard acid-based fuel cells used today.
HEM fuel cells have a shortcoming that has kept them off the roadway– they are extremely delicate to carbon dioxide in the air. Essentially, the carbon dioxide makes it hard for a HEM fuel cell to breathe.
This defect rapidly reduces the fuel cells performance and performance by approximately 20%, rendering the fuel cell no better than a fuel engine. Yans research group has actually been browsing for a workaround for this carbon dioxide quandary for over 15 years.
The UD research teams spiral injury module takes in hydrogen and air through two different inlets (shown left wing) and gives off carbon dioxide and carbon dioxide-free air (revealed on the right) after travelling through two large-area, catalyst-coated shorted membranes. The inset image on the right shows, in part, how the particles move within the short-circuited membrane. Credit: University of Delaware
A few years back, the scientists understood this drawback might really be an option– for co2 removal.
” Once we went into the mechanism, we realized the fuel cells were recording almost every bit of carbon dioxide that entered them, and they were really good at separating it to the opposite,” said Brian Setzler, assistant professor for research study in chemical and biomolecular engineering and paper co-author.
While this isnt helpful for the fuel cell, the team knew if they might leverage this integrated “self-purging” procedure in a different device upstream from the fuel cell stack, they could turn it into a co2 separator.
” It turns out our method is really reliable. We can catch 99% of the co2 out of the air in one pass if we have the ideal design and best configuration,” said Yan.
How did they do it?
They found a way to embed the power source for the electrochemical technology inside the separation membrane. The approach involved internally short-circuiting the device.
” Its risky, but we handled to manage this short-circuited fuel cell by hydrogen. And by utilizing this internal electrically shorted membrane, we were able to get rid of the bulky components, such as bipolar plates, existing collectors or any electrical wires typically found in a fuel cell stack,” said Lin Shi, a doctoral candidate in the Yan group and the papers lead author.
Now, the research study group had an electrochemical device that looked like a regular filtering membrane produced separating out gases, but with the ability to continuously choose up trace elements of carbon dioxide from the air like a more complicated electrochemical system.
This photo reveals the electrochemical system developed by the Yan group. Inside the highlighted round metal housing shown is the research study teams novel spiral wound module. As hydrogen is fed to the device, it powers the co2 removal process. Computer system software application on the laptop computer plots the carbon dioxide concentration in the air after going through the module. Credit: University of Delaware
In result, embedding the gadgets wires inside the membrane produced a short-cut that made it simpler for the carbon dioxide particles to take a trip from one side to the other. In other words, they now have a smaller sized bundle capable of filtering higher amounts of air at a time, making it both affordable and reliable for fuel cell applications.
The research groups outcomes revealed that an electrochemical cell measuring 2 inches by 2 inches could continually remove about 99% of the co2 found in air streaming at a rate of approximately 2 liters per minute. An early model spiral gadget about the size of a 12-ounce soda can is efficient in filtering 10 liters of air per minute and scrubbing out 98% of the carbon dioxide, the scientists said.
Scaled for a vehicle application, the gadget would be approximately the size of a gallon of milk, Setzer said, but the gadget could be used to get rid of co2 in other places, too. For example, the UD-patented technology might allow lighter, more efficient co2 removal gadgets in spacecraft or submarines, where continuous purification is critical.
” We have some ideas for a long-term roadmap that can truly help us arrive,” stated Setzler.
According to Shi, given that the electrochemical system is powered by hydrogen, as the hydrogen economy establishes, this electrochemical gadget could likewise be utilized in airplanes and buildings where air recirculation is preferred as an energy-saving procedure. Later this month, following his argumentation defense, Shi will sign up with Versogen, a UD spinoff company founded by Yan, to continue advancing research study toward sustainable green hydrogen.
Reference: “A shorted membrane electrochemical cell powered by hydrogen to get rid of CO2 from the air feed of hydroxide exchange membrane fuel cells” by Lin Shi, Yun Zhao, Stephanie Matz, Shimshon Gottesfeld, Brian P. Setzler and Yushan Yan, 3 February 2022, Nature Energy.DOI: 10.1038/ s41560-021-00969-5.
Co-authors on the paper from the Yan lab consist of Yun Zhao, co-first author and research study associate, who performed speculative work necessary for evaluating the device; Stephanie Matz, a doctoral student who added to the developing and fabrication of the spiral module, and Shimshon Gottesfeld, an adjunct teacher of chemical and biomolecular engineering at UD. Gottesfeld was primary private investigator on the 2019 task, moneyed by the Advanced Research Projects Agency-Energy (ARPA-E), that caused the findings.

University of Delaware researchers have broken brand-new ground that might bring more ecologically friendly fuel cells closer to commercialization. Credit: Graphic illustration by Jeffrey C. Chase
University of Delaware researchers carbon capture advance might bring eco-friendly fuel cells better to market.
University of Delaware engineers have shown a method to successfully capture 99% of co2 from air utilizing an unique electrochemical system powered by hydrogen.
It is a significant advance for carbon dioxide capture and could bring more eco-friendly fuel cells better to market.

The UD research teams spiral wound module takes in hydrogen and air through 2 separate inlets (shown on the left) and discharges carbon dioxide and carbon dioxide-free air (revealed on the right) after passing through 2 large-area, catalyst-coated shorted membranes. As hydrogen is fed to the device, it powers the carbon dioxide removal process. Computer software on the laptop plots the carbon dioxide concentration in the air after passing through the module. In impact, embedding the devices wires inside the membrane created a short-cut that made it easier for the carbon dioxide particles to take a trip from one side to the other. In other words, they now have a smaller sized bundle capable of filtering higher quantities of air at a time, making it both affordable and effective for fuel cell applications.