欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
采用连续共沉淀和喷雾干燥成型相结合的方法，制备了实验室级和放大级做球状费托（FT）合成Fe／Cu／K／SiO2催化剂．实验室级催化剂的颗粒尺寸为5～15μm，放大级催化剂的颗粒尺寸为40～60μm．利用低温N2物理吸附、H2程序升温还原、CO2，程序升温脱附、穆斯堡尔谱和X射线衍射等表征手段考察了催化剂的织构性质、还原行为、碳化行为及物相变化．结果表明，与实验室级催化剂相比，放大级催化剂具有较大的晶粒尺寸和孔径、较小的比表面积和较弱的表面碱性，催化剂的还原和碳化受到抑制．浆态床FT合成反应及扫描电子显微镜结果表明，放大级催化剂经诱导期达到稳定状态后，转化率可达到实验室级催化剂的水平，且具有很高的稳定性、重质烃选择性及抗磨损性．
英文摘要：
Two spherical Fe/Cu/K/SiO2 catalysts with different preparation scale for slurry Fischer-Tropsch （FT） synthesis were prepared by a combination of co-precipitated and spray drying method. The pellet size of the catalyst with a laboratory scale is 5-15 μm, whereas that is 40-60 μm for the scaled-up catalyst. N2 physical adsorption, H2 temperature-programmed reduction, CO2 temperature-programmed desorption, M6ssbauer spectroscopy, and X-ray diffraction were used to characterize the textural properties, reduction and carburization behavior, and phase transformation of the two catalysts. The results show that the scaled-up catalyst has larger crystallize size and pore volume, lower BET surface area, and lower surface basicity than the laboratory-scale catalyst. Moreover, the scaled-up catalyst was more difficult to be reduced and carburized. However, the results of FT synthesis in a slurry bed indicate that the scaled-up catalyst exhibits comparative activity, better reaction stability, and higher selectivity for olefin and heavy hydrocarbons. Scanning electron microscopy results suggest a better attrition resistance of the scaled-up catalyst during the FT reaction tests.
同期刊论文项目
同项目期刊论文
Phase transformations of a spray-dried iron catalyst for slurry Fischer-Tropsch synthesis during act
Effect of interaction between potassium and structural promoters on Fischer-Tropsch performance in i
Formation of CHx species from CO dissociation on double-stepped Co(0001):exploring Fischer-Tropsch m
Effect of reduction pressure on precipitated potassium promoted iron-manganese catalyst for Fischer-
Density Functional Theory Study of Triangular Molybdenum Sulfide Nanocluster and CO Adsorption on It
Effect of air-exposure on reduction behavior of a Fe–Mn–Cu–K/SiO2 Fischer-Tropsch synthesis catalyst
Effect of ZrO2 promoter on structural change of Co/SiO2 catalyst during its deactivation in F-T synt
Isothermal kinetics modelling of the Fischer-Tropsch synthesis over the spray-dried Fe-Cu-K catalyst
Preparation and catalytic activity for Fischer-Tropsch synthesis of Ru nanoparticles confined in the
Effect of catalyst pore size on the catalytic performance of silica supported cobalt Fischer-Tropsch
位置：