You will be hearing from Amy Ruddock later today, and she will talk more about Carbon Engineering. This technology was developed by a Canadian company, Carbon Engineering. They are just carrying the CO2 from the atmosphere to its concentrated form. The potassium hydroxide goes around in a wet loop, and the calcium hydroxide goes around in a dry loop. The CO2 dissociates from the calcium carbonate and pure CO2 is captured. The calcium hydroxide reacts and it forms calcium carbonate which goes into a Calciner.ĭirect heat is applied in the Calciner and the temperature is raised to 900 degrees C. They react and form potassium carbonate which is taken to a Pellet reactor. Instead of contacting air with water, we’re contacting air with potassium hydroxide, which is alkaline. The technology begins with air contactors, which are essentially repurposed force draft cooling towers. That CO2 can be brought in and stored geologically along with atmospherically sourced CO2. The point source can be co-located with the direct air capture and sequestration projects. We can combine CO2 with green hydrogen and make fuels like sustainable aviation fuel or other forms of low carbon intensity fuel. We have looked at some of the products that are being developed and there are a lot of innovative technologies out there for using captured CO2 like in building materials, plastics and fabrics. We can also take the CO2 and use it as a feed stock.
It can be stored permanently for millennia. The CO2 captured can be stored geologically and put back to where the carbon came from in the first place. With the help of energy derived from zero emissions energy sources which can be a combination of renewables, nuclear or conventional thermal power generation along with integrated CCUS, we can drive the Direct Air Capture facilities. That technology is Direct Air Capture (DAC). This is a huge challenge, which is why I am now going to talk about a technology that can help us get us there. For a Net Zero world in 2050, up to 15 billion tons of CO2 per year needs to be removed from the atmosphere and permanently stored. But I want to draw attention to the objectives which includes limiting the global warming to 1.5 degrees C. You are all familiar with why we are here and what we’re trying to achieve. Today, I am going to talk about a subset of CCUS, which is Direct Air Capture (DAC). It is amazing just how much has transformed over time. I first came to this country in 1995 and now I have returned after a seven-year absence, and it feels like a fourth different country. I lived here three times and it felt like living in three different countries. It has been around seven years since I have been here. It is a great pleasure to be back here in Qatar.
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