Pd/NC催化剂高效催化糠醛选择性加氢制糠醇的研究

Study on Pd/NC catalysts for selective hydrogenation of furfural to furfuryl alcohol

利用高温热解金属有机框架(MOFs)制备不同Pd负载量(0.1%、1%、5%)的氮掺杂碳负载Pd纳米颗粒催化剂(Pd/NC),考察了其催化糠醛选择性加氢性能。当Pd负载量为0.1%时,Pd/NC催化剂在反应温度为120℃、反应压力为3.0 MPa H_(2)的条件下催化糠醛加氢反应4 h,糠醛转化率为93.8%,糠醇选择性为86.7%,糠醇收率为81.4%。利用SEM、TEM、HRTEM、XRD、XPS、STEM和STEM-EDX元素面扫等表征手段对催化剂的结构和形貌进行表征与分析,结果表明,高分散的小尺寸Pd金属纳米粒子与载体之间存在着协同作用,使催化剂表现出优异的催化糠醛选择性加氢制糠醇性能。

Nitrogen-doped carbon-loaded Pd nanoparticle catalysts(Pd/NC)with different Pd loadings(0.1%,1%,5%)are prepared through high-temperature pyrolysis of metal-organic frameworks(MOFs),and their catalytic performance for selective hydrogenation of furfural is evaluated.It is shown that the conversion of furfural reaches 93.8%,the selectivity and yield of furfural alcohol are 86.8%and 81.3%,respectively when furfural hydrogenation over Pd/NC catalyst with a Pd loading of 0.1%has performed for 4 h at 120℃and 3.0 MPa H_(2) reaction pressure.The structure and morphology of the catalysts are analyzed through the techniques such as SEM,TEM,HRTEM,XRD,XPS,STEM and STEM-EDX mapping.It is verified that the catalysts exhibit excellent performance due to synergistic effect of highly dispersed Pd metal nanoparticles and NC support.