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以硝酸镧、硝酸钴、钼酸铵等为基本原料,采用水热法合成出复合催化剂前驱体。前驱体经高温煅烧得到掺镧钴钼复合催化剂粉体。然后通过TG-DSC、FTIR、XRD、SEM等检测手段对前驱体及产物的物性和结构进行表征,揭示其内在的物理化学特性。结果表明:在本实验条件下,合成出的前驱体具有一定的抗烧结能力,镧元素已掺入到钴钼复合氧化物的晶格之中,形成了掺镧钴钼复合催化剂粉体。粉体颗粒表面孔洞丰富,有较大的比表面积,符合催化剂的物性要求。
With lanthanum nitrate, cobalt nitrate, ammonium molybdate as the basic raw materials, hydrothermal synthesis of composite catalyst precursor. The precursor is calcined at high temperature to obtain a lanthanum-doped cobalt-molybdenum composite catalyst powder. The physical and chemical properties of the precursors and their precursors were characterized by TG-DSC, FTIR, XRD and SEM, revealing their intrinsic physicochemical properties. The results show that under the experimental conditions, the synthesized precursors have a certain anti-sintering ability, and the lanthanum element has been incorporated into the lattice of the cobalt-molybdenum composite oxide to form the lanthanum-doped cobalt-molybdenum composite catalyst powder. Porous particles on the surface of the hole, a larger specific surface area, in line with the physical properties of the catalyst.