Green hydrogen production breakthrough uses steel slag and coal ash to cut costs and capture CO2

Research & DevelopmentOhio State University researchers have pioneered an integrated process that turns steel slag and coal ash into calcite while lowering electrolysis energy, promising negative-emissions green hydrogen at under $1/kg when co-product value is included. Researchers over at Ohio State University have just rolled out this really exciting lab-scale process that combines industrial decarbonization with green hydrogen production. They’re tapping into two major waste products—steel slag and coal ash—to capture CO₂ while cutting down the energy needed for water electrolysis. Their innovative approach might just produce hydrogen with a net-negative carbon footprint using regular grid electricity, and they're estimating the costs could dip below a buck per kilogram when you factor in what they can earn from high-purity calcite. Here are a few highlights from their work:Reactor Synergy: Mixing Mineralization with ElectrolysisThe...