Catalyst Screening and Product Distribution of Low Temperature Coal Tar Hydrogenation
1.School of Chemical Engineering, Northwest University, Xi’an 710069, China;
2.Baoji University of Arts and Sciences, Baoji 721000, China;
3.Shaanxi Research Center of Chemical Engineering Technology for Resource Utilization, Northwest University, Xi’an 710069, China;
4.Shaanxi Yanchang Petroleum(Goroup) Co LTD High-efficiency Utilization Technology Research Center, Xi'an 710000, China
Abstract： Four Ni-W/γ-Al2O3 catalysts with different mass ratio of Ni to W were prepared by the same volume impregnation method using γ-Al2O3 as carrier. The physical and chemical properties of the catalysts were characterized by X-ray diffraction (XRD), N2 adsorption-desorption, temperature programmed desorption (NH3-TPD) scanning electron microscopy (SEM). Hydrogenation experiments of the low-temperature (under 360 °C) coal tar oil distillates were carried out on a 30 mL fixed bed reactor and the catalyst with better hydrogenation performance was screened out. The effects of hydrogenation conditions on the distribution of hydrogenated products and heteroatom removal were investigated. The results showed that high temperature was not conducive to the light weight of the oil products and would reduce the thiophene removal rate of organic sulfur compounds, but it was conducive to removal of polycyclic nitrogen compounds which were hard to remove. High pressure could inhibit the cracking reaction and dehydrogenation reaction. It could also increase the yield of gasoline and diesel oil. At the same time, high pressure was beneficial to improve the hydrogenation reaction rate of polycyclic nitrogen containing substance and thus improve the denitrification rate. Hydrogenation reactions at low space velocities favored for the removal of heteroatoms and the lighting of oil products.
Lei Xiong1,3,Pan Liuyi1 et al. Catalyst Screening and Product Distribution of Low Temperature Coal Tar Hydrogenation[J]. 化学反应工程与工艺, 2017, 33(5): 392-401.
