Retrofitting existing cooling towers with direct air capture 
CategoriesSustainable News

Retrofitting existing cooling towers with direct air capture 

Spotted: The International Energy Agency (IEA) says that in the net zero by 2050 scenario, direct air capture (DAC) needs to reach almost 60 megatonnes of CO2 every year by 2030. Currently, the 18 direct air capture plants in operation around the world are only sequestering 0.01 megatonnes of CO2. While experts consider 60 megatonnes of CO2 captured per year to be an attainable amount, additional large-scale plants are needed to reach that volume. 

As well as building new plants, retrofitting old structures could be another way of reducing global emissions. German company NeoCarbon has built a system that integrates with existing cooling towers to capture carbon dioxide from the circulating air. As well as being ten times less expensive than a new carbon capture plant, NeoCarbon’s design could remove several billion tonnes of CO2 if it was applied to Europe’s current industrial manufacturing infrastructure. 

NeoCarbon works with businesses to set up the carbon capture system and requires no upfront costs. Carbon dioxide is removed from the air as it circulates throughout the cooling towers, reducing companies’ emissions footprint without requiring any additional building expenses. 

NeoCarbon transforms captured emissions into newly usable formats, including industrial chemicals and food-grade materials. Brands can buy removal credits as well as the captured carbon dioxide for use in their plants, and the NeoCarbon team says that their technology is mass market ready.  

Sequestering carbon is an exciting area of growth, with Springwise spotting innovations improving ways emissions are captured, as well as expanding the uses of the waste carbon. In the fashion industry, one company is replacing traditional polyester fabrics with a net-positive version made from carbon dioxide. And another organisation is using geothermal energy to sustainably power its direct air capture systems.

Written By: Keely Khoury

Reference

Powering direct air capture with geothermal energy 
CategoriesSustainable News

Powering direct air capture with geothermal energy 

Spotted: As the United Nations (UN) highlights, on the whole, commitments made by governments to cut emissions haven’t been fulfilled, meaning we are falling short of net-zero goals for 2050. And, energy consumption and corresponding carbon emissions are only set to rise with the growing global population. Changes to existing energy-heavy practices are unlikely to be enough to stop or significantly slow climate change, which is where carbon capture comes in. However, direct air capture (DAC) technologies – where CO2 is extracted from the ambient air – often rely on energy sources like fossil fuels to work, making them unsustainable long term. Enter Fervo Energy.

The US-based company is already a leader in the next generation of geothermal power, and earlier this year announced plans for a fully integrated geothermal and DAC facility with financial support from the Chan Zuckerberg Initiative (CZI).

In DAC facilities, large fans are used to blow ambient air over carbon-dioxide-capturing materials. The sequestered CO2 is then heated, refined, and generally stored deep underground using a pump. In Fervo’s proposed designs, all of these processes would be fueled by geothermal power, in which heat from the Earth’s core is used to produce clean and renewable electricity. This makes it possible to clean our atmosphere of carbon without emitting any further pollution. As well as being a renewable source that is available 24/7, the company also emphasises that the use of geothermal power would allow DAC technologies to be operated at lower costs.

The recent grant from CZI will help make Fervo’s designs a reality, allowing the company to explore local geothermal reservoirs for underground carbon sequestration projects. Fervo aims to have a pilot facility up and running in three to five years, according to reports in the Washington Post.

Other innovations in the geothermal industry spotted by Springwise include a new ultra-deep drilling technique, and heating and cooling system designed for use by homeowners.

Written By: Keely Khoury and Matilda Cox

Reference