623-30-3Relevant articles and documents
Study of the oxidative esterification of furfural catalyzed by Au25(glutathione)18 nanocluster deposited on zirconia
Shahin, Zahraa,Rataboul, Franck,Demessence, Aude
, (2020/11/24)
Au/ZrO2 catalyst prepared from Au25(SG)18 nanoclusters (SG stands for glutathione) deposited on ZrO2 has shown to be an efficient system for the oxidative esterification of furfural with methanol. The influence of the supported nanoclusters was studied and showed that partial calcination of the supported nanoclusters at 300 °C was sufficient for a quantitative formation of methyl-2-furoate even in the absence of a base. In the presence of 0.27 mol% of Au, initial activities up to 250 h?1 were obtained at 100 °C under 6 bar of O2. The reactivity was extended to the oxidative esterification of furfuryl alcohol and the formation of various products and intermediates was discussed.
A selective oxidative valorization of biomass-derived furfural and ethanol with the supported gold catalysts
Gao, Yiqi,Tong, Xinli,Zhang, Haigang
, p. 238 - 245 (2019/06/18)
The oxidative upgrading of renewable furfural (FUR) and ethanol is an important way to produce high-quality liquid fuel and value-added furanic derivatives. In this work, a series of supported Au catalysts were prepared using the colloid-immobilization technique, and further employed for catalytic oxidative condensation of FUR with ethanol in the presence of molecular oxygen. It is found that, with Au@CaO as the catalyst, 85.9% conversion of FUR and 81.8% selectivity of the product furan-2-acrolein were achieved in the absence of any homogeneous basic additive. The effects of different reactions such as reaction time, temperature and catalyst amount were explored in detail. Also, the influences of calcination temperature and amount of protective agent during the preparation of catalyst were investigated. According to the characterization results of catalyst, it is concluded that the synergistic effect of metallic Au and basic site of CaO support plays a significant role on the selective oxidative condensation. At last, a possible reaction mechanism is proposed based on the catalytic principle and experimental results.
Versatile catalysis of iron: Tunable and selective transformation of biomass-derived furfural in aliphatic alcohol
Zhang, Zhenya,Tong, Xinli,Zhang, Haigang,Li, Yongdan
, p. 3092 - 3100 (2018/07/13)
An iron-catalyzed efficient valorization of biomass-derived furfural (FUR) in aliphatic alcohols is developed in which product selectivity can be simply regulated by varying the gas atmosphere. In the presence of molecular oxygen, there is oxidative condensation of FUR with ethanol, and the obtained product is furan-2-acrolein in a "FUR-ethanol-O2" system. Under suitable conditions, the conversion of FUR and selectivity of furan-2-acrolein are 84.2% and 82.7%, respectively. In the presence of H2, the selective hydrogenation of FUR is achieved, and the main product is furfuryl alcohol in a "FUR-ethanol-H2" system. Under optimal conditions, a 99.9% conversion of FUR and 93.6% selectivity of furfuryl alcohol are attained. This provides an economic, green and sustainable method for the utilization of biomass-based platform compounds in the chemical industry.