Ni_2P/rGO-Al_2O_3催化剂的表征及加氢脱氧性能

Characterization of Ni_2P/rGO-Al_2O_3 Catalyst and Its Catalytic Performance in Hydrodeoxygenation

以鳞片石墨为原料,通过Hummer法合成氧化石墨(GO),然后与拟薄水铝石溶液充分混合后还原,得到还原氧化石墨烯-氧化铝复合载体(rGO-Al_2O_3),再采用浸渍法制备出负载型Ni_2P/rGO-Al_2O_3催化剂。通过扫描电子显微镜、物理吸附仪和X射线衍射仪等手段对催化剂进行了表征。以苯甲醛加氢脱氧(HDO)制甲苯为反应体系,在反应温度300℃、压力2.5MPa、反应时间4h条件下,对比了rGO-Al_2O_3复合载体与单独rGO或Al_2O_3负载的Ni_2P催化剂的加氢脱氧性能。结果表明,rGO-Al_2O_3具有发达的孔结构和较大的表面积,Ni_2P/rGO-Al_2O_3催化剂展现出良好的催化活性和选择性。

Using flake graphite as raw material,graphite oxide(GO)was synthesized by hummer method,and GO was mixed with pseudo-boehmite solution to synthesize reduced graphene oxide-alumina(rGO-Al2O3)composite support.Then,Ni2P/rGO-Al2O3 catalyst was prepared by impregnated method.The catalysts were characterized by scanning electron microscopy(SEM),physical adsorption(BET)and X-ray diffraction(XRD).The performance of Ni2P catalyst supported on rGO-Al2O3 composite support and rGO or Al2O3 alone in hydrodeoxygenation(HDO)was compared,under the conditions of reaction temperature of 300℃,pressure of 2.5 MPa and reaction time of 4h with benzaldehyde as substrate.Results show that the rGO-Al2O3 has abundant of pore structure and large surface area,and the Ni 2P/rGO-Al2O3 catalyst shows excellent catalytic activity and selectivity.