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The two-step nano-scale self-assembly technique and the framework structure mechanism for forming mesoporous supports were employed for preparing Al_2O_3-TiO_2 complex supports with large pore volume that were applied for manufacturing the resid hydrotreating catalysts.The influence of different TiO_2 contents and calcination temperatures on specific surface area,pore volume and pore size distribution of complex supports was studied.TEM and SEM were employed to characterize the Al_2O_3-TiO_2 complex supports.Test results revealed that the specific surface area of Al_2O_3-TiO_2 complex supports was the largest at a TiO_2 mass fraction of 20%,and when the calcination temperature was in the range between 300℃to 700℃,the pore distribution of the complex support was stable.Characterization of the complex support by TEM and SEM demonstrated that TiO_2 was homogeneously distributed in the complex support,which was in favor of carrying active components.The Al_2O_3-TiO_2 complex supports can function as the best catalyst support for resid hydrotreating catalysts.
The two-step nano-scale self-assembly technique and the framework structure mechanism for forming mesoporous supports were employed for preparing Al 2 O 3 -TiO 2 complex supports with large pore volume that were applied for manufacturing the resid hydrotreating catalysts. The influence of different TiO 2 contents and calcination temperatures on specific surface area, pore volume and pore size distribution of complex supports was studied. TEM and SEM were employed to characterize the Al_2O_3-TiO_2 complex supports.Test results revealed that the specific surface area of Al_2O_3-TiO_2 complex supports was the largest at a TiO 2 mass fraction of 20%, and when the calcination temperature was in the range between 300 ° C. and 700 ° C., the pore distribution of the complex support was stable. Characterization of the complex support by TEM and SEM demonstrated that TiO 2 was homogeneously distributed in the complex support, which was in favor of carrying active components. The Al 2 O 3 -TiO 2 complex supports c an function as the best catalyst support for resid hydrotreating catalysts.