Highly Active and Selective NiFe/SiO2 Bimetallic Catalyst with Optimized Solvent Effect for the Liquid-Phase Hydrogenation of Furfural to Furfuryl Alcohol
Highly Active and Selective NiFe/SiO2 Bimetallic Catalyst with Optimized Solvent Effect for the Liquid-Phase Hydrogenation of Furfural to Furfuryl Alcohol
复制标题
具有优化溶剂效应的高活性、选择性 NiFe/SiO2 双金属催化剂用于糠醛液相加氢制糠醇
DOI：
10.1021/acssuschemeng.8b02876
复制
发表时间：
2018-10-01
影响因子：
8.4
通讯作者：
Wang, Tiefeng
中科院分区：
文献类型：
--
作者：
Jia, Pei;Lan, Xiaocheng;Wang, Tiefeng
目前，有毒的铜铬催化剂或贵金属催化剂用于生物质衍生的糠醛选择加氢制取关键中间体呋喃醇(FFA)。为此，我们开发了高效、无铬的镍基非贵金属双金属催化剂。用X射线衍射仪、透射电子显微镜和TPR对催化剂进行了表征，并对催化剂进行了评价，结果表明，Ni3Fe1/SiO_2催化剂具有明显的协同效应。与Ni/SiO_2单金属催化剂相比，活性提高了8倍，FFA选择性从50%提高到91.7%。此外，在催化活性和产物分布方面，溶剂效应是显著的。质子型溶剂，尤其是醇具有最高的反应速率和FFA选择性。以甲醇为溶剂时，过量加氢生成的副产物四氢呋喃醇经竞争吸附后几乎完全被抑制。在优化的操作条件下，Ni3Fe1/SiO_2催化剂在甲醇溶剂中表现出100%的转化率和96.5%的FFA选择性，且具有良好的回收性能，远远优于已报道的催化剂。
Toxic Cu-Cr catalysts or precious metal catalysts are currently used for the selective hydrogenation of biomass-derived furfural to the key intermediate furfuryl alcohol (FFA). Herein, efficient and Cr-free Ni-based nonprecious bimetallic catalysts were developed. Catalyst characterizations with XRD, TEM, and TPR and catalytic evaluation revealed that the Ni3Fe1/SiO2 catalyst showed a significant synergetic effect. Compared with the Ni/SiO2 monometallic catalyst, the activity increased by 8 times, and the selectivity to FFA increase from 50% to 91.7% over the Ni3Fe1/SiO2 bimetallic catalyst. Furthermore, the solvent effect is significant in terms of catalytic activity and product distribution. Protic solvents, especially alcohols, showed the highest reaction rate and FFA selectivity. The byproduct tetrahydrofurfuryl alcohol, which is produced by excessive hydrogenation, was almost completely inhibited due to competitive adsorption when using methanol as solvent. At optimized operating conditions, the Ni3Fe1/SiO2 catalyst showed 100% conversion and 96.5% selectivity to FFA in methanol solvent with a good recyclability, which was much better than most reported catalysts.