The US start-up Carbonquest wants to use cement to bind CO2 in new buildings in New York in the long term. But the approach is still comparatively expensive.
In addition to rising temperatures and extreme weather, climate change harbors other dangers. This is because the air quality in numerous large cities around the world has decreased due to greenhouse gases. This in turn increases the risk of certain lung diseases.
To ensure that this trend does not continue, more and more approaches to improving air quality are emerging. One example is the city of New York, which suffers particularly badly from air pollution. Recently, fires in Canada caused gigantic amounts of smog to reach the city.
Real estate impacts New York’s air quality
In order to protect the citizens of the city, the administration passed new laws. These set new limits for emissions from buildings. At the same time, property owners should operate their buildings more efficiently. At present, pipe systems simply transport pollutants such as nitrogen or CO2 into the environment.
Non-compliance with limit values could therefore become increasingly expensive in the medium term. The US start-up Carbonquest has now presented an approach as to how CO2 can be used sustainably in the long term. As far as possible, the company would like to recycle carbon dioxide in the short term and use it for cement production.
Cement could bind CO2 in buildings in the long term
To do this, the start-up built a system in a building in Manhattan. During everyday operation, a system absorbs the building’s pollutants and filters the CO2 out of the mixture. During the process, the system cools the mixture down to minus 23 degrees Celsius and liquefies it under high pressure.
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A truck then picks up the liquefied carbon dioxide twice a week and takes it to a factory in Brooklyn. A machine then feeds the CO2 into cement production. There it reacts with the raw material and mineralizes. This has a decisive advantage.
Because even if the cement block is damaged one day, the greenhouse gas will no longer escape into the atmosphere. So far, the technology is still expensive, since a system costs up to ten million US dollars. But it has the potential to indirectly make every new building a climate protector.
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2023-08-20 05:00:01
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