Study On Catalytic Properties Of Ni_xP/Zr-MCM-41 And Mo₂N/Zr-MCM-41 For Hydrogenation Degradation Of Jatropha Curcas Oil

With the development of the society, the demands for energy are growing, while the reserves of fossil energy are declining. As fossil energy is not renewable in a short-term, it will be gradually exhausted. More importantly, fossil fuels produce toxic and harmful gases and particles while burning that pollute the environment seriously. Finding a clean energy to replace fossil fuels in the context of haze growing seriously is urgent. The preparation of the second generation of bioenergy by means of hydrogenation deoxygenation as a feasible way has attracted much attention at home and abroad.In this paper, zirconium-doped Zr-MCM-41 and MCM-41 were prepared by hydrothermal method. The prepared carriers were analyzed by small angle XRD, SEM,TEM, N2-BET and Py-IR. A more suitable Zr-MCM-41 was selected as the carrier of the hydrodeoxygenation catalyst when taking into consideration of the acid value, specific surface area, pore volume, pore size and pore structure of the carrier.Mo₂N/Zr-MCM-41 and Ni_xP/Zr-MCM-41 catalysts were prepared by using isovolumetric impregnation. The catalysts prepared under different conditions were analyzed by high-angle XRD, TEM, N2-BET and XPS. The results showed that the active groups were Ni12P5 and Ni3P when Ni/P = 2:1 and Ni/P=3:1, respectively, and Ni12P5 and Ni3P were highly dispersed in Zr-MCM-41.The optimum synthesis temperature of Mo₂N was 700?. at which the content of Mo₂N in the active component was the highest.The activity of the catalyst was evaluated in a high pressure magnetic stirrer. The product oil which was obtained by hydrogenation degradation of Jatropha curcas Oil was analyzed by GC-MS. The results showed that the optimum loading of Ni12P5 and Ni3P were 15% and 20% respectively. Both catalysts had good deoxidizing activities, and the comprehensive deoxidation rate was about 98%. Under these conditions, the hydrogenation ability was better and the contents of alkanes in the oil were 69.06% and 72.64%respectively. The optimal loading amount of Mo₂N was 20% and the optimum reaction temperature was 350?.,the dehydrogenation rate of Mo₂N/Zr-MCM-41 was almost 100%under optimum conditions. And the hydrogenation capacity was very good. Olefin in the product oil content was only 1.39%, while the content of the alkane could reach 79.37%.Mo₂N/Zr-MCM-41 had excellent isomerization and catalytic cracking activity. As the reaction temperature increasing, the degree of catalytic cracking increased. In the product oil, aromatic compounds were main composed of monocyclic and bicyclic aromatic hydrocarbons. In addition,the C4?C12 compounds content in alkanes were 65.55%.