# Chemoenzymatic Processing ## The Premise Chemical plants run on fossil fuel feedstock. Every barrel of oil that enters a refinery locks the industry deeper into a supply chain built on extraction. Chemoenzymatic processing offers a way out. ## The Method Pair an enzyme with a metal catalyst. The enzyme handles what biology does best — selective, stereospecific transformations under mild conditions. The metal catalyst drives what chemistry does best — high-energy bond formations, oxidations, and reductions at scale. Together, they accomplish in one reactor what neither achieves alone. An enzyme converts a renewable substrate into a chiral intermediate. A palladium or ruthenium catalyst then transforms that intermediate into a high-value chemical product. The sequence replaces petrochemical routes with bio-based ones, and it does so with fewer steps, less waste, and lower energy demands. ## Why It Matters Conventional synthesis depends on harsh solvents, extreme temperatures, and petroleum-derived starting materials. Chemoenzymatic cascades operate in water, at ambient temperature, and start from sugars, lignin, or carbon dioxide. They cut the carbon footprint at the source — not by capturing emissions, but by eliminating the fossil inputs that produce them. The efficiency gains compound. Enzymes achieve selectivities that metal catalysts cannot match, which means fewer byproducts and fewer purification steps. Metal catalysts reach reaction spaces that enzymes cannot access, which means broader product scope. Fusing the two expands what green chemistry can manufacture. ## The Opportunity Chemical manufacturing consumes roughly 10% of global energy and generates 5% of global CO₂ emissions. Most of that burden traces back to feedstock. Replace the feedstock, and the entire equation shifts. Chemoenzymatic processing does not ask chemical plants to shrink. It asks them to switch — from petroleum to biomass, from brute-force conditions to precision catalysis, from linear waste streams to circular ones. The plants stay. The fossil dependence goes.