A kind of bulk hydrogenation catalyst and preparation method thereof

Abstract

The invention discloses a bulk phase hydrogenation catalyst and a preparation method thereof. The catalyst is a spherical particle, and the pore size distribution has the following properties: the average pore size d from the center of the catalyst particle to the range x*R 1 is 50~100nm, where x is 0.1~0.9, the average pore diameter d from the catalyst particles x*R to the outer surface of the catalyst 2 is 120~180nm, d 2 ‑d 1 =40~130nm. The bulk hydrogenation catalyst has the following properties: specific surface area is 200~300m 2 / g, pore volume is 0.7~0.9ml·g ‑1 ;The average pore diameter is 30~120nm, of which the pore distribution of <30nm accounts for 5%~10% of the total pore volume, the pore distribution of 30~100nm accounts for 50%~60% of the total pore volume, and the pore distribution of >100nm accounts for the total pore volume. 30%~40%. The bulk phase hydrogenation catalyst of the present invention has larger pore volume and pore diameter, and at the same time, the outer pore diameter is larger than the inner pore diameter, the catalyst surface active metal density is greater, the hydrogenation active metal utilization rate and the catalyst internal utilization rate are higher, and the catalyst decreases Deactivation rate, improve catalyst life. The method of the invention simultaneously realizes the continuous production of the hydrogenation catalyst, improves the production efficiency, and reduces the production cost.

Description

technical field [0001] The invention relates to the field of distillate oil hydrogenation, in particular to a bulk phase hydrogenation catalyst and a preparation method thereof. Background technique [0002] The pore size of the residual oil hydrogenation catalyst is generally concentrated at 8-15nm, and the catalyst has a high initial activity. The content of colloidal asphaltenes in residual oil raw materials is relatively high and the molecular diameter ranges from 10nm to hundreds of nm. However, the deposition of metal impurities in colloidal asphaltenes is mostly unevenly distributed in the catalyst particles, and there are many internal deposits along the diameter of the catalyst particles. , the trend of less external deposition is mainly due to the irregular arrangement of pores of different sizes in the catalyst, and the deposition of metal impurities on the outer surface causes the pores to be blocked, resulting in the effective use of large internal pores and act...

AI Technical Summary

Problems solved by technology

The use of co-precipitation method will make the distribution of different hydrogenation active metals difficult to control, thus affecting the distribution of different hydrogenation active metals and reducing the interaction between active metals. At the same time, the content of active metals in the catalyst surface is small and the density of active metals is relatively high Low, ultimately affecting the hydrogenation performance of the catalyst

Images