首页|Bifunctional hybrid organosiliceous catalysts for aldol condensation-hydrogenation tandem reactions of furfural in continuous-flow reactor
Bifunctional hybrid organosiliceous catalysts for aldol condensation-hydrogenation tandem reactions of furfural in continuous-flow reactor
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NSTL
A series of organic-inorganic hybrid bifunctional organosiliceous catalysts with accessible pendant amine groups as single basic sites(such as propylamine,diethylamine,pyrrolidine)and Pd nanoparticles was prepared from suitable synthesis processes.Pd/MCM-41 silica decorated with propylamine groups was highly active and selective for the single-reactor tandem aldol condensation/crotonization reaction between furfural with methyl isobutyl ketone,followed by hydrogenation,to access renewable biosolvent and biofuel precursors in the branched alkane range at mild temperature(80-100 ℃).The catalyst was characterized in detail using XRD,C and N elemental analysis,ICP-OES,TGA/DTA,HR-TEM,N2 adsorption/desorption at 77 K,solid-state ~(13)C and ~(29)Si MAS NMR and FT-IR spectroscopy CO2 as acid probe.The catalyst was robust when operated in a dual fixed-bed reactor achieving steady 20 % furfural conversion for 12 h on stream with preferential formation of l-(furan-2-yl)-5-methylhexan-3-one.
Instituto de Tecnologla Quimica,Universitat Poliiecnica de Valencia-Consejo Superior de Investigaciones Cientificas,Avenida de los Naranjos s/n,E-46022 Valencia,Spain
NSTL
