Carbon dioxide + water = liquid hydrocarbon fuel
According to a report from the University of Texas at Arlington on the 22nd, a research team at the university demonstrated that the concentration of light, heat and high pressure can directly convert carbon dioxide and water into useful liquid hydrocarbon fuels in one step. This simple, inexpensive new renewable fuel technology is expected to help remove atmospheric carbon dioxide and limit global warming. Oxygen is emitted as a by-product during the reaction and has the positive effect of purifying the environment.
In a paper published in the Proceedings of the National Academy of Sciences, the researchers pointed out that carbon dioxide and water can be converted into liquid hydrocarbons and oxygen in one step in a photochemical chemical reactor at 180°C to 200°C and 6 atmospheres. The project's co-host researcher and professor Brian Dennis of the School of Mechanical and Aeronautical Engineering explained that focusing light can cause photochemical reactions to generate high-energy intermediates and heat, which triggers thermochemical reactions that form carbon chains, which results in a single-step process. Hydrocarbons.
The project co-host researcher Frederic McDonnell said: "Compared with battery or gaseous hydrogen powered automotive technology, our process has an important advantage. Many of the hydrocarbon products in the reaction are current cars, trucks and Used in aircraft, so there is no need to change the existing fuel sales system."
As the researchers envisaged, parabolic mirrors were used to focus sunlight on the catalyst bed to provide heat and light excitation for the reaction. Excess heat can also be used to drive the operation of related solar fuel facilities, including product separation, water purification, and the like. Duane Dimos, the deputy head of the university, said that the discovery of one-step conversion of carbon dioxide and water into renewable hydrocarbon fuels was a huge success and that the results will be incorporated into their 2020 strategic plan.
The researchers also pointed out that the experimental mixed photothermal chemical catalyst was based on titanium dioxide, but titanium dioxide could not absorb all the visible spectrum. McDonnell said that the next step is to develop photocatalysts that better match the solar spectrum in order to use the entire incident spectrum more efficiently. The overall goal is to create renewable solar liquid fuels. (Reporter Chang Lijun)
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