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Gas-phase hydrogenolysis of bio-derivated diethyl succinate was investigated over Cu-ZnO catalyst and Cu-ZnO/solid acid (HY, HZSM-5, SAPO-11 and γ-A12O3) bifunctional (hydrogenolysis/dehydration) catalysts in a fixed-bed reactor.Gamma-butyrolactone, 1,4-butanediol, tetrahydrofuran and ethanol are main products of diethyl succinate hydrogenolysis.