2021-10-04

The metal pressurization method has buried billions of tons of harmful carbon dioxide on the seabed for hundreds of years

By yqqlm yqqlm

The metal pressurization method has buried billions of tons of harmful carbon dioxide on the seabed for hundreds of years </ P >

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p > researchers at the University of Texas at Austin have made a new discovery in cooperation with ExxonMobil, which may change this situation to a great extent. They have found a way to provide super power for the formation of carbon dioxide based crystal structures. One day, billions of tons of carbon can be stored on the seabed for hundreds of years</ p>

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p > Vaibhav Bahadur (VB), associate professor of Walker Department of mechanical engineering at Cockerell College of engineering, said: “I think carbon capture is like insurance for the earth,” he is the main author of a new paper on this research in ACS Journal of sustainable chemistry and engineering. “Carbon neutralization is not enough now. We need to be negative carbon to eliminate the damage to the environment over the past few decades.” </ P >

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p > these structures are called hydrates, which are formed when carbon dioxide and water are mixed at high pressure and low temperature. Water molecules are repositioned as cages to capture carbon dioxide molecules</ p>

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p > but the process starts very slowly — it may take hours or even days to start responding. The team found that by adding magnesium to the reaction, hydrate formation was 3000 times faster than the fastest method currently used, even as fast as 1 minute. This is the fastest hydrate formation rate ever recorded</ p>

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p > “the most advanced method today is to use chemicals to promote the reaction,” Bahadur said. “This is effective, but slow, and these chemicals are expensive and environmentally unfriendly.” </ P >

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p > hydrates are formed in reaction dishes. In practice, these reaction devices can be deployed to the ocean floor. Using existing carbon capture technologies, carbon dioxide will be extracted from the air and brought to an underwater reactor where hydrates will grow. The stability of these hydrates reduces the threat of leakage in other carbon storage methods, such as injecting them as gas into abandoned gas wells</ p>

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p > figuring out how to reduce carbon in the atmosphere is the biggest problem in the world. There are only a few research groups in the world studying carbon dioxide hydrate as a potential carbon storage scheme</ p>

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p > Bahadur said: “we only capture about half of the carbon we need to capture by 2050. This tells me that there is still a lot of room for research in the field of carbon capture and storage technology.” </ P >

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p > Bahadur has been committed to hydrate research since he came to UT Austin in 2013. The project is part of a research collaboration between ExxonMobil and UT Austin’s Energy Research Institute</ p>

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p > researchers and ExxonMobil have filed a patent application to commercialize their discovery. Next, they plan to solve the problem of efficiency – increase the amount of carbon dioxide converted to hydrate in the reaction process – and establish the possibility of continuous hydrate production</ p>