New approaches in catalyst manufacture
Changes in both petroleum refinery feedstocks and refinery product slates during the past 10 years have necessitated new approaches in catalyst manufacture. New hydrotreating catalysts are expected to improve polynuclear aromatic saturation, and to increase cetane index, mild hydrocracking, asphaltene conversion, and contaminant metal removal. Sulfur and nitrogen removal were once considered the sole benefits of hydroprocessing. To accommodate these needs, catalyst manufacturers have focused added attention on defining and achieving rigorous physical and chemical specifications for each new catalyst. It is considered essential to continually improve quality and process control in each manufacturing step. In addition, manufacturers have introduced new technology both in the process and in the evaluation of product. The importance of pore size distribution (PSD), for example, has been appreciated for 20 years or more but it is only within the past 10 years that routine measurement of PSD by mercury and/or nitrogen porosimetry has been applied throughout the entire manufacturing process. A greater emphasis on heavy oil hydrotreating has spurred demands for wide pore catalysts of small external dimensions to overcome the problems of diffusion-limited reactions. In turn, however, these properties may create problems with crush strength and catalyst attrition.
- Research Organization:
- American Cyanamid Co., Stamford, CT 06904
- OSTI ID:
- 5784221
- Journal Information:
- Chem. Eng. Prog.; (United States), Vol. 82:3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CATALYSTS
CHEMICAL PREPARATION
HYDROCRACKING
PETROLEUM
ANTIKNOCK RATINGS
ASPHALTENES
CALCINATION
CATALYST SUPPORTS
CHEMICAL PROPERTIES
DEMETALLIZATION
DENITRIFICATION
DESULFURIZATION
PETROLEUM REFINERIES
PHYSICAL PROPERTIES
POLYCYCLIC AROMATIC HYDROCARBONS
POROSITY
AROMATICS
ASPHALTS
BITUMENS
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROCARBONS
INDUSTRIAL PLANTS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PYROLYSIS
SEPARATION PROCESSES
SYNTHESIS
TAR
THERMOCHEMICAL PROCESSES
020400* - Petroleum- Processing