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Oak barrel charring and lignin degradation
Whiskey Science Exclusive

Oak Barrel Charring Chemistry: Lignin Degradation, Hemicellulose Pyrolysis, and Filtration Dynamics in Whiskey Aging

Direct gas-fired charring of American white oak triggers three parallel pyrolytic transformations, hemicellulose, lignin, and tannin, that collectively define the color, flavor, and filtration character of aged whiskey.

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