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考察了(1.0%、4.0%、6.0%)Ru/ZrO2催化剂的丙酸水相加氢性能.采用N2物理吸附、CO脉冲化学吸附、H2程序升温还原(H2-TPR)、CO和丙酸吸附傅里叶变换红外光谱(FTIR)研究了Ru/ZrO2催化剂的物理化学性质.COFTIR表明,Ru负载量增加,催化剂表面Ru粒子的富电子程度增加,更接近金属Ru的本征特性.丙酸FTIR表明,丙酸分子在Ru/ZrO2催化剂表面经解离吸附主要形成丙酰基和丙酸盐物种.随Ru含量增加,丙酰基更容易发生脱羰反应,导致C—C键断裂.
The propane acid aqueous hydrogenation performance of Ru / ZrO2 catalysts was investigated at 1.0%, 4.0% and 6.0% respectively. The effects of N2 physisorption, CO pulse chemisorption, H2 temperature-programmed reduction (H2-TPR) Fourier transform infrared spectroscopy (FTIR) was used to investigate the physicochemical properties of the Ru / ZrO2 catalyst. COFTIR showed that the Ru loading increased and the electron-rich Ru content of the catalyst surface was closer to that of Ru. The results showed that propionic acid molecules mainly formed propionyl and propionate species on the surface of Ru / ZrO2 catalyst, propionyl and propionate species formed more easily with the increase of Ru content, propionyl group was more prone to decarbonylation reaction, leading to the cleavage of C-C bond.