Abstract
A one-pot cascade conversion of cellulose to GVL was investigated over bimetallic Ru-Cu deposited on a zeolite Y(Ru-Cu/Z)catalyst.Under supercritical methanol conditions,high-yield(49.8%)cascade conversion of cellulose to GVL was achieved at 250 ℃,with an initial H2 pressure of 3.0 MPa and reaction time of 5 h.The Ru-Cu/Z catalyst was synthesized using activated reductive deposition CARD),which resulted in the selective deposition of Cu nanodomains on Ru nanoparticles,thereby facilitating the dissociative adsorption of H2.In addition,Lewis and Br0nsted acid sites of Cu-doped zeolite Y effectively proceeded to cascade conversion reactions,including alcoholysis,isomerization,dehydration,and acetalization reactions,suppressing humin formation.The bimetallic Ru-Cu/Z catalyst was used in six consecutive runs,with a marginal loss of activity.The structure-performance relationships of the Ru-Cu/Z catalysts synthesized using ARD,incipient wet impregnation,and reduction deposition methods were compared.
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