Fractionation of Red Wine Grape Pomace by Subcritical Water Extraction/Hydrolysis

•Subcritical water treatment of red wine grape pomace (RWGP) in semi-continuous reactor.•Effect of temperature program at 100 bar on the composition in phenolics and hemicellulose of RWGP liquors/extracts.•Effective separation of cellulose and lignin in solid fraction.•High yields of recovery of hemicellulose (mostly as oligomers), phenolics, lignin, and glucose, after enzymatic hydrolysis of remaining solid.