Pd/WO_(3)催化剂的合成及其催化糠醛选择性加氢性能研究  

Synthesis of Pd/WO_(3)catalysts and their catalytic property for selective hydrogenation of furfural

作　　者：常德政 高岩 CHANG De-zheng;GAO Yan(Henan Institute of Metallurgy Co.,Ltd.,Zhengzhou 450053,China;Henan Provincial Research Center of Metallurgical Spent Heat and Solid Waste Resource Utilization Engineering Technology,Zhengzhou 450053,China)

机构地区：[1]河南省冶金研究所有限责任公司,河南郑州450053 [2]河南省冶金余热固废资源利用工程技术研究中心,河南郑州450053

出　　处：《现代化工》2024年第6期156-160,共5页Modern Chemical Industry

基　　金：河南省科学院科研开发专项(20230112)。

摘　　要：糠醛是木制纤维素的水解产物,由于其分子结构中含有多个官能团且官能团的结构异常敏感,糠醛选择性催化加氢可制得2-甲基呋喃、糠醇、四氢糠醇、呋喃、四氢呋喃等一系列高附加值化学品。因此,制备了一种高活性、高选择性(四氢糠醇)、稳定性好及贵金属负载量低的负载型催化剂。采用硼氢化钠液相化学还原法合成了具有不同Pd负载量的Pd/WO_(3)催化剂(0.34%、2.0%和4.5%),考察了Pd的负载量及反应温度对Pd/WO_(3)催化糠醛选择性加氢的影响,结果表明,最佳反应条件为:2.0%Pd、反应时间为2 h、反应温度为150℃,此时糠醛转化率为99.0%,四氢糠醇选择性达92.2%。低温反应(100℃)时升高Pd负载量有利于提高催化剂性能,高温反应(150℃)时Pd最佳负载量为2.0%。Furfural is a product from hydrolysis of lignocellulose.Because it contains multiple functional groups in its molecular structure and the structure of functional groups is extremely sensitive,a series of high-value chemicals,such as 2-methylfuran,furfuryl alcohol,tetrahydrofurfuryl alcohol,furan and tetrahydrofuran,can be obtained through selective catalytic hydrogenation of furfural.Thereby,a supported catalyst with low noble metal loading,high activity,high selectivity(for tetrahydrofurfuryl alcohol),and excellent stability is prepared.Pd/WO_(3)catalysts with various Pd contents(0.34 wt%,2.0 wt%and 4.5 wt%)are prepared via NaBH_(4)liquid phase chemical reduction method,and the effect of Pd content and reaction temperature on the catalytic behaviors of Pd/WO_(3)for selective hydrogenation of furfural is also investigated.The optimal reaction conditions are determined as follows:the loading amount of Pd is 2.0 wt%,reaction lasts for 2 h,and reaction temperature is 150℃.Under the optimal conditions,the conversion of furfural reaches 99.0%and the selectivity of tetrahydrofurfuryl alcohol reaches 92.2%.The higher Pd loading is beneficial for improving the performance of the catalyst under low temperature reaction(100℃),while the optimal Pd loading is 2.0 wt%under high temperature reaction(150℃).

关 键 词：糠醛 选择性加氢 Pd/WO_(3) 高分散 

分 类 号：G642[文化科学—高等教育学]