Source：(Kang Bin) China Metallurgical News (2nd edition, July 01, 2022)

On June 22, the U.S. Department of Energy's National Energy Technology Laboratory decided to invest approximately $3.46 million in research and development funds to conduct front-end engineering research on carbon dioxide removal and utilization technologies at the Gary plant of U.S. Steel in Indiana. The study will focus on the direct Air carbon capture and storage (DACS) process, which removes 5,000 tonnes of carbon dioxide per year from the natural atmospheric environment and then permanently mineralizes it in concrete products.

Carbon dioxide removal and utilization technology can make full use of residual heat and energy of steel mills, thus maximizing energy efficiency and minimizing transportation costs of steel mills.

The plan is to capture carbon dioxide from the air and liquefy it. The liquefied gas will be sent to US Steel's Ozinga premix plant, where carbon dioxide removal and utilization technology will be used to inject it directly into the concrete being stirred. When injected, the liquefied gas is immediately mineralized and permanently fixed in the concrete.

The DEPARTMENT of Energy said the study could help the United States address the climate crisis and achieve its goal of net zero greenhouse gas emissions by 2050.