主讲人：Professor Jialai Wang

邀请人：钱鑫 副教授

时间：2024年6月4日（周二）上午9:30-11:00

地点：通达馆103会议室

主讲人简介：

Dr. Jialai Wang is a professor in the Department of Civil, Construction, and Environmental Engineering (CCEE) at the University of Alabama. His research focuses on the decarbonization of emissions-intensive industries and the built environment through material innovation. His current research interests include low-carbon construction materials, carbon capture and utilization, sustainable production of clean hydrogen, nanotechnologies, thermal energy storage, and material circularity. His work has been continuously supported by various federal agencies, such as the U.S. National Science Foundation and the U.S. Department of Energy, with total funding exceeding $10 million. He has published more than 100 journal articles and has been granted six U.S. patents. One of his inventions, regarding sequestering CO2 in concrete, has been licensed to CarbonCure Technologies, LLC for commercial applications.

主讲内容简介：

Concrete can serve as a CO2 sink through a mineralization process, in which CO2 react with calcium-rich minerals in concrete to produce CaCO3 and permanently store CO2. However, the full potential of concrete for CO2 sequestration can’t be reached by existing technologies (limited by diffusivity and reactivity) and existing carbonation technology may lead to durability concerns of the produced concretes. To fully unlock this potential, we propose a new pathway to sequester CO2 into concrete, biomolecule regulated carbonation (BioCarb) method. Unlike any existing methods, the BioCarb method adds CO2 into concrete before mixing through carbonating a cement slurry regulated with a biomolecule, which controls the crystal nucleation, morphology, and phase of the calcium carbonate and disperses the produced CaCO3 nanoparticles. This method increases the CO2 uptake of the cement slurry by at least one order of magnitude in comparison with existing methods. More importantly, multiple interactions between the carbonate and the cement can be triggered by the metastable CaCO3 produced through BioCarb, significantly enhancing the strength of the produced concrete.

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