Carbon nanofibers supported Ru catalyst for sorbitol hydrogenolysis to glycols: Effect of calcination |
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Authors: | Long Zhao Jinghong Zhou Hong Chen Mingguang Zhang Zhijun Sui Xinggui Zhou |
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Affiliation: | (1) College of Chemical Engineering, Xiangtan University, Xiangtan, 411105, China |
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Abstract: | Carbon nanofiber (CNFs) supported Ru catalysts for sorbitol hydrogenolysis to ethylene glycol and propylene glycol were prepared
by incipient wetness impregnation, calcination and reduction. The effect of calcination on catalyst properties was investigated
using thermal gravimetry analysis, temperature-programmed reduction, X-ray diffraction, X-ray photoelectron spectroscopy,
transmission electron microscopy and N2 physisorption. The results indicated that calcination introduced a great amount of surface oxygen-containing groups (SOCGs)
onto CNF surface and induced the phase transformation of Ru species, but slightly changed the texture of Ru/CNFs. The catalytic
performance in sorbitol hydrogenolysis showed that Ru/CNFs catalyst calcined at 240 °C presented the highest glycol selectivities
and reasonable glycol yields. It was believed that the inhibition and confinement effect of SOCGs around Ru particles as well
as the high dispersion of Ru particles was the key factor for the catalytic activity. |
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