Characteristics of catalyst shapes and their application to hydrotreating

Conference · Thu Jan 01 04:00:00 EST 1987

OSTI ID:6437457

Phansalkar, S S

The characteristics of catalysts with special shapes and their advantages in hydrotreating are discussed. Relative activity and pressure drop comparisons are presented for the several catalyst shapes tested. In addition, the important physical properties of specially shaped catalysts are discussed and the calculation of catalyst bed pressure drop for specially shaped catalysts is reviewed. Among the shapes investigated, it is concluded that the three leaf clover (TLC) shape incorporated by TRILOBE/sup */ catalyst and the helically wound TLC shape incorporated by RIFLED/sup */ TRILOBE catalyst offer 15-20 percent higher catalyst activity when compared with a cylinder shape catalyst. Catalyst particles with both shapes can offer a greater tolerance to metals contamination versus a cylinder shape catalyst, due to a higher geometric surface area-to-volume ratio (S/sub p//V/sub p/). The helical winding of the lobes of a TLC shape catalyst extrudate increases its S/sub p//V/sub p/ ratio by about 10 percent. The primary advantage of helically winding the TLC shape extrudate is that it increases the catalyst bed void fraction and lowers the packed catalyst bed pressure drop. RIFLED TRILOBE catalyst offers a 40 percent lower pressure drop than an equivalent size standard TRILOBE catalyst.

• OSTI ID: 6437457
• Report Number(s): CONF-871113-
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ACTIVATION ENERGY
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL REACTIONS
CONFIGURATION
CRACKING
DECOMPOSITION
ENERGY
HYDROCARBONS
HYDROCRACKING
ORGANIC COMPOUNDS
PACKED BED
PERFORMANCE
PRESSURE DROP
PYROLYSIS
THERMOCHEMICAL PROCESSES