A powerhouse collaboration of universities and industry, led by the McKelvey School of Engineering, is embarking on a bold plan to transform manufacturing toward zero or negative emissions by converting carbon dioxide ultimately into environmentally friendly chemicals and products.
Researchers at Washington University in St. Louis are working on giving biomanufacturers a competitive edge by solving the challenge of continuous fermentation.
Society has long struggled with petroleum-derived plastic pollution, and awareness of microplastics’ detrimental effects on food and water supplies adds further pressure. “We created this multilayer structure where cellulose is in the middle and the bioplastics are on two sides,” said Joshua Yuan, the Lucy and Stanley Lopata Professor and chair of energy, environmental and chemical engineering at the McKelvey School of Engineering. “In this way, we created a material that is very strong and that offers multifunctionality."
To minimize the impact of human-made climate change, it is essential to significantly and rapidly decrease carbon dioxide emissions while simultaneously meeting the energy and manufacturing needs of a healthy and economically stable society.
Researchers in the labs of Joshua Yuan in the McKelvey School of Engineering and Susie Dai at the University of Missouri used electrocatalysis of carbon dioxide to turn carbon dioxide into intermediates that are then converted by microbes into lipids, or fatty acids, and ultimately became biodiesel feedstock. The process is much more efficient that photosynthesis and uses significantly less land than soybean-based biodiesel.
Joshua S. Yuan, chair of the Department of Energy, Environmental & Chemical Engineering at McKelvey School of Engineering at Washington University in St. Louis, was installed as the Lucy & Stanley Lopata Professor Oct. 17, 2024.
Plastic is everywhere in our lives, from furniture to food packaging to diapers. It is nearly impossible to go for one hour without touching or using something made from petroleum-derived plastic. While the material is durable and cheap to produce, its impact on the environment and on our health is so costly that researchers predict more plastic than fish in the world’s oceans by 2050, and microplastic particles are now found in human blood.
Meet Joshua Yuan, who joined the McKelvey School of Engineering in May as chair of the Department of Energy, Environmental & Chemical Engineering. Yuan brings his robust research in energy and environmental sustainability, as well as experience in entrepreneurship, to the growing department.
A $1.5 million DOE grant will help team led by McKelvey Engineering develop quantum-based imaging technology.
A team of researchers has developed a system that uses carbon dioxide, CO2, to produce biodegradable plastics, or bioplastics, that could replace the nondegradable plastics used today. The research addresses two challenges: the accumulation of nondegradable plastics and the remediation of greenhouse gas emissions.
Research from Washington University in St. Louis may soon lead to lighter, stronger carbon fiber materials and stronger plastics with a gentler environmental impact. The main ingredient necessary for these improvements is lignin, a compound that is essential for most plants but considered a waste product by industry.
A novel technology for using bioremediation to clean chemical pollutants has been developed by a collaborative team that includes Joshua Yuan, chair and professor of energy, environmental & chemical engineering at Washington University in St. Louis’ McKelvey School of Engineering.
The Yuan group's research encompasses four major directions: renewable biomaterials, carbon capture and utilization, integrated biorefining, systems and synthetic biology.
For renewable biomaterial, we have pioneered new chemical fractionation and manufacturing technologies along with feedstock design to process lignin into quality carbon fibers, bioplastics, recyclable polymer and biodegradable plastics composites, biodiesel, nanoparticle, asphalt binder modifier and other products. The technology breakthroughs are based on fundamental understanding of structure-function relationship between lignin chemistry and renewable material performance. Furthermore, his team have engineered microorganisms to convert lignin and other waste products into structurally preferred PHA for broad bioplastic applications.
For carbon capture and utilization (CCU), we focused on overcoming the fundamental limits of solar-to-molecule efficiency in the natural photosynthesis system to achieve efficient carbon capture, conversion, and utilization. Our research advances two frontiers. First, we advance the chem-bio hybrid route to by-pass Rubisco carbon fixation with electro- or photo-catalysis to produce biocompatible intermediates for downstream bioconversions. Recent breakthroughs in EMC2+ (Electro-Microbial conversion with C2+ intermediates) system have surpassed the solar-to-molecule energy efficiency in natural photosynthesis by multiple folds, achieving very efficient carbon capture and conversion. Second, we have addressed several major challenges in algal carbon capture and utilization. We have integrated artificial intelligence and synthetic biology to develop continuous algal cultivation technologies achieving the highest reported outdoor productivity. Based on this technology, they are advancing novel CCU platforms for flue gas, direct air capture, and various other CO2 emissions. We also developed auto-sedimentation to reduce the harvest cost substantially.
For integrated biorefining, our team addressed the dilemma of "lignin-first" and "carbohydrate-first" processes and designed novel biorefining procedures to synergistically derive more processable lignin and carbohydrate. Together with the biomaterial design and synthetic biology, these engineering technologies could potentially enable the integrated biorefinery with multiple product streams for profitability and sustainability.
For systems and synthetic biology, Professor Yuan's team advanced the fundamental understanding of photosynthetic carbon repartition from sugar metabolism to terpene biosynthesis. The research has led to the sustainable manufacturing platform for squalene, an essential vaccine adjuvant, cosmetic and nutraceutical product. The research also empowered efficient biomass processing and algal biofuels and bioproduct manufacturing.
The Yuan Research Group is currently seeking a post-doc with experience in synthetic biology, specifically gene cloning and recombinant protein expression. Interested applicants please reach out to Joshua Yuan at joshua.yuan@wustl.edu.
Joshua S. Yuan, Ph.D.
Lucy & Stanley Lopata Professor and Chair, Department of Energy, Environmental, and Chemical Engineering, The McKelvey School of Engineering, Washington University in St. Louis
Joshua Yuan serves as the Lucy & Stanley Lopata Professor, the Chair for the Department of Energy, Environmental and Chemical Engineering, and the Director of Carbon Utilization Redesign through Biomanufacturing (CURB) NSF Engineering Research Center at Washington University in St. Louis. Previously, he was a faculty member at Texas A&M University since 2008 and was appointed as the Chair for Synthetic Biology and Renewable Products in 2018. He has served as the Director of the Synthetic and Systems Biology Innovation Hub since 2015. Joshua has built a career in developing, disseminating, and implementing sustainability solutions for the future. His research focuses on CO2 utilization, renewable biomaterials, biomass processing, and biorefining, as well as synthetic and systems biology. He has been awarded four U.S. patents and has five pending. He has written more than 100 peer-reviewed journal articles, published in Joule, Chem, Matter, One Earth, Nature Communications, Green Chemistry, Advanced Sciences, and PNAS, among others. He is now a Fellow of the Royal Society of Chemistry.