Dr. Thien Nguyen (left) and Professor Cafer T. Yavuz (right) pose with a bottle of CO2-loaded guanidinium sulfate salt (held by Dr. Nguyen). The ten gas-filled, two-liter bottles in front represent the required space for the same amount of carbon dioxide that would be needed were it not being held in clathrate form (small bottle).
A team of international researchers led by Professor Cafer T. Yavuz of King Abdullah University of Science and Technology (KAUST), Prof. Bo Liu from University of Science and Technology of China (USTC), and Prof. Qiang Xu of Southern University of Science and Technology (SUSTech) have developed a promising method for carbon capture and storage.
Methane hydrate is studied for its ability to capture and trap gas molecules such as carbon dioxide under high pressure. However, it is difficult to impossible to recreate these conditions in the lab, and the approach is additionally energy intensive, as the methane-ice solid requires refrigeration. Using a salt — guanidinium sulfate — the scientists have successfully created lattice-like structures called clathrates that effectively mimic the methane hydrate activity, trapping the CO2 molecules and resulting in an energy efficient way to contain the greenhouse gas.
“The guanidinium sulfate serves to organize and trap the CO2 molecules without reacting with them,” said Cafer Yavuz, professor of chemistry, and director of the KAUST Oxide and Organic Nanomaterials for Energy & Environment (ONE) Laboratory.“We have discovered a rare example of a clathrate that is stable and non-corrosive at ambient temperature and pressure, a highly desirable feature compared with ethanol amine, ammonia and other solutions that are commonly used in carbon capture.”
Previous carbon capture methods included chemisorption, where chemical bonds form between CO2 molecules and the surface. This process worked well; however, the chemical bonds require energy to break them down, which drives up the cost of the CO2 capture operation. The salt-based, clathrate structure utilizes low energy, physisorption processes while capturing CO2 without water or nitrogen interference, opening a promising venue for future carbon capture and storage technologies through rapid CO2 solidification.
The discovery introduces a new way of storing and transporting carbon dioxide as a solid. CO2 is conventionally carried as a solid in the form of dry ice; compressed in gas cylinders; or in the form of carbonates. The salt clathrate allows CO2 to be carried as a solid powder, yielding remarkably high volume per weight capacity, making this method the least energy intensive, with tremendous potential for real life applications.
“Our team made it possible to carry CO2 in a solid form without the need for refrigeration or pressure. You will be able to literally shovel CO2 loaded solids from now on,” he said. “The impact is wide and strong, as the global fuel industry and the Kingdom entities are actively looking for ways to capture, store and transport CO2 without significant energy penalties.”
The breakthrough could have a significant impact on the fight against climate change, enabling energy-efficient carbon capture and storage. The research team is optimistic that their findings will lead to further improvements in CO2 capture in terms of stability, recyclability, sorption capacity and selectivity, and lowering regeneration energy penalty and cost.
Original Article: Researchers create salts for cheap and efficient CO2 capture
The Latest Updates from Bing News
Go deeper with Bing News on:
Carbon capture and storage
- Aker Carbon Capture awarded milestone project in the United States
CO280 Solutions and a leading pulp and paper company have awarded a carbon capture test campaign to Aker Carbon Capture for an undisclosed site on the Gulf Coast in the US. This test campaign follows ...
- Germany takes step toward net-zero goal, announces carbon storage
It doesn’t foresee allowing storage sites on land, but Habeck said that could be considered later if German state governments approve. Opponents maintain that so-called carbon capture and storage is ...
- North Dakota legislators oppose $300K grant to promote carbon capture
The state Legislature approved the $300,000 grant for education and promotion of carbon capture. Now, some don't want the grant as the controversial Summit Carbon Solutions pipeline awaits approval.
- Germany plans to enable underground storage of carbon dioxide at offshore sites
Germany plans to enable underground carbon storage at offshore sites, pushing ahead with a much-discussed technology in an acknowledgement that time is running out to combat climate change, the ...
- Germany to allow carbon capture, underwater storage
German Economy Minister Robert Habeck says Berlin will need to allow sub-seabed storage of CO2 produced in certain industries in order to reach its goal to be carbon neutral by 2045.
Go deeper with Bing News on:
- Adding everyday ingredient to coffee could endanger those with high blood pressure
People are adding a pinch of salt to their coffee as a way to counteract the bitterness of the drink and boost flavours. While a small amount of salt is unlikely to cause harm, having too much ...
- Top 8 Best Salt And Pepper Mills in 2024
No matter how much a high-end chef incorporates exotic ingredients and unique spices, they won’t get far in any recipe without the fundamentals: salt and pepper. The purest flavor comes from ...
- Do Saltwater Flushes Work?
It involves drinking a mixture of warm water and non-iodized salt. Drinking salt and warm water has a laxative effect. It usually causes urgent bowel movements within 30 minutes to an hour ...
- Why SALT tax reform keeps failing
The advocates for reforms to state and local tax (SALT) deductions have often been able to garner plenty of attention for their cause, but have proven markedly less able to get their demands ...
- Use of salt substitutes linked to lower risk of high blood pressure
Replacing regular salt with a salt substitute can reduce high blood pressure in older adults, a new study has found. Older adults who use a salt substitute are 40% less likely to develop high ...