官能化碳纳米管负载Ru催化山梨醇氢解制备低碳二元醇OA北大核心CSCDCSTPCD

Ruthenium catalysts supported on carbon nanotubes with different functional groups ( MCN, AMCN and GMCN ) were prepared by incipient wetness impregnation with ultrasonic-assistance and used for the hydrogenolysis of sorbitol. The catalysts were characterized by X-ray diffraction ( XRD ) , HRTEM, X-ray photoelectron spectroscopy ( XPS) and ICP-AES. The effects of functional group species, and base additives on the catalytic performance of Ru/CNTs in the sorbitol hydrogenolysis reaction were investigated. Nearly 99. 5%of sorbitol conversion and 47 . 7% total yield of ethylene glycol and 1 , 2-propanediol ( 1 , 2-PD ) could be achieved over Ru/AMCN under mild reaction conditions (205℃, 5. 0 MPa), using Ca(OH)2 as additive. The conversion of sorbitol and the selectivity to ethylene glycol ( EG ) and 1 , 2-propanediol ( 1 , 2-PD ) did not decrease over the five repeated runs, which confirmed that the Ru/AMCN catalyst exhibited high stability in the aqueous hydrogenolysis of sorbitol to glycols.