University of Texas at Arlington chemists and engineers have converted carbon dioxide and water directly into useable liquid hydrocarbon fuels – in one step. The “simple and inexpensive new sustainable fuels technology” used concentrated sunlight, high pressure and heat to remove CO2 from the air and even revert oxygen back into the system. Researchers demonstrated that a one-step conversion of carbon dioxide and water into liquid hydrocarbons and oxygen can be performed in a photothermochemical flow reactor operating at 180 to 200 degrees C and pressures up to six atmospheres. Brian Dennis, UTA professor of mechanical and aerospace engineering and co-principal investigator of the project, explains, “We are the first to use both light and heat to synthesize liquid hydrocarbons in a single stage reactor from carbon dioxide and water. Concentrated light drives the photochemical reaction, which generates high-energy intermediates and heat to drive thermochemical carbon-chain-forming reactions, thus producing hydrocarbons in a single-step process.” Frederick MacDonnell, UTA’s interim chair of chemistry and …