In Europe, transport is responsible for nearly 30% of the total CO2 emissions, of which 72% comes from road transportation*. While the use of electric vehicles for personal transportation could help lower that number, reducing emissions from commercial transport – such as trucks or buses – is a much greater challenge.
Researchers at EPFL Valais Wallis have now come up with a novel solution: capturing CO2 directly in the trucks’ exhaust system and liquefying it in a box on the vehicle’s roof. The liquid CO2 is then delivered to a service station, where it is turned into conventional fuel using renewable energy. The project is being coordinated by the Industrial Process and Energy Systems Engineering group, led by François Maréchal, at EPFL’s School of Engineering. The patented concept is the subject of a paper published in Frontiers in Energy Research.
A complex process onboard the vehicle
Scientists propose to combine several technologies developed at EPFL to capture CO2 and convert it from a gas to a liquid in a process that recovers most of energy available onboard, such as heat from the engine. In their study, the scientists used the example of a delivery truck.
First, the vehicle’s flue gases in the exhaust pipe are cooled down and the water is separated from the gases. CO2 is isolated from the other gases (nitrogen and oxygen) with a temperature swing adsorption system, using metal-organic frameworks (MOFs) adsorbent, which are specially designed to absorb CO2. Those materials are being developed by the Energypolis team at EPFL Valais Wallis, led by Wendy Queen. Once the material is saturated with CO2, it is heated so that pure CO2 can be extracted from it. High speed turbocompressors developed by Jürg Schiffmann’s laboratory at EPFL’s Neuchâtel campus use heat from the vehicle’s engine to compress the extracted CO2 and turn it into a liquid. That liquid is stored in a tank and can then be converted back into conventional fuel at the service stations using renewable electricity. “The truck simply deposits the liquid when filling up with fuel,” says Maréchal.
The whole process takes place within a capsule measuring 2 m x 0.9 m x 1.2 m, placed above the driver’s cabin. “The weight of the capsule and the tank is only 7% of the vehicle’s payload,” adds Maréchal. “The process itself uses little energy, because all of its stages have been optimized.”
The researchers’ calculations show that a truck using 1 kg of conventional fuel could produce 3kg of liquid CO2, and that the conversion does not involve any energy penalty.
Only 10% of the CO2 emissions cannot be recycled, and the researchers propose to offset that using biomass.
The system could theoretically work with all trucks, buses and even boats, and with any type of fuel. The advantage of this system is that, unlike electric or hydrogen-based ones, it can be retrofitted to existing trucks in order to neutralize their impact in terms of carbon emissions.
Go deeper with Bing News on:
- Down the Fairway: Barlette chips in to capture Schenectady Classic women’s title
The only other sub-par round of the day belonged to Joe ... winning five Assistant Player of the Year awards and capturing three NENY PGA Assistant Stroke Play Championships, as well as an ...
- Direct Air Capture (DAC or DACCS) Market Analytics Drivers, Restraints and Opportunities 2028 | Latest Release By IBI
The key objective of the report to analyse the global Direct Air Capture (DAC or DACCS) market in an integrated manner is to identify the central nodes, important segments and sub-segments ...
- What are the best bridge cameras?
Scenes can be lined up using the 3.2-inch ... bursts to capture ultra slow-motion sequences. If you’re on the lookout for a bridge camera that gives maximum bang for your buck, the Canon SX70 HS ...
- FROM LINEAR TO CIRCULAR, THE PROGRESSING STORY OF NESTLÉ’S SUSTAINABILITY INITIATIVES
Commemorating Sustainability Month, Nestlé East and Southern Africa presents an exhibition profiling three of its flagship sustainability initiatives in South Africa NAIROBI, Kenya, 15 June 2022 ...
- Most common photography mistakes revealed – as snap-happy Brits admit they take the same pic 3 TIMES to get it right
But Brits estimate 28 per cent of the photos filling up their camera roll are sub-standard ... of 2. Catch the right expressions: It is your job to capture the perfect ...
Go deeper with Google Headlines on:
Go deeper with Bing News on:
- Bitcoin Mining Could Be The Answer To Nigeria’s Inflationary Crisis
Renewable energy potential, wide adoption and deflationary fiat make Nigeria the perfect home for extensive bitcoin mining operations.
- Climate Change, Fossil-Fuel Pollution, and Children’s Health
Given the frequent co-occurrence of various fossil-fuel exposures ... Afghanistan and other parts of Asia, Australia, sub-Saharan Africa, and the southeastern United States.
- 'Keep stepping up': Race to Zero raises the bar for 'net zero' investors
The Race to Zero campaign has significantly raised the threshold that investors, companies, cities and sub-national governments must meet to credibly claim to be working towards net zero emissions by ...
- Toyota launches its first electric car the bZ4X
Buzz? It marks the start of Toyota's sub-brand for zero emission vehicles. It's handy timing for a new electric car, as petrol hits the £2 a litre mark and filling up an average car crashes ...
- Climate scientists say expected ocean changes require planning for many generations ahead
"This process means that while surface warming may stabilize at about 1.5-2℃ when global emissions reach net-zero emissions, sub-surface ocean ... another co-author of the paper.