Trickle-bed reactor for investigating upgrading reactions
The catalytic processing of heavy petroleum feeds and many of the heavier synthetic fuels is performed in the liquid phase and quite often in trickle-bed reactors. In this paper we present the basis for the design of a microscale trickle-bed reactor for studying the kinetics of reactions related to coal liquefaction processes. This small (10 cm-long) catalyst bed was used to study the hydrogenation of naphthalene to tetralin at 373 K and the hydrogenation of pyrene to dihydropyrene at 573 K. The hydrogenation of naphthalene to tetralin using a palladium (Pd) catalyst has been shown to be a pseudo-first-order irreversible reaction at 373 K, while the hydrogenation of pyrene to dihydropyrene using a nickel molybdenum on alumina catalyst (NiMo/alumina) has been shown to be a pseudo-first-order reversible reaction at 573 K. First-order kinetic plots for the flow reactor experiments show that plug-flow behavior was achieved for both the hydrogenation of naphthalene and pyrene. In addition, plug flow was not perturbed by increasing the hydrogen gas flow by a factor of four. A reactor of such small scale with achievable plug flow behavior is an important tool for catalyst activity testing since it provides the ability to adjust reaction conditions easily and allows catalyst deactivation to be studied more effectively. In addition, a wide variety of hydrotreating reactions including hydrodesulfurization (HDS), hydrodeoxygenation (HDO), and hydrodenitrogenation (HDN), can be studied using this simple reactor design. 10 refs., 6 figs., 1 tab.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- DOE/DP
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5003424
- Report Number(s):
- SAND-89-2023C; CONF-900391-1; ON: DE90006045
- Resource Relation:
- Conference: 1990 American Institute of Chemical Engineers (AIChE) spring meeting, Orlando, FL (USA), 18-22 Mar 1990
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CHEMICAL REACTORS
COAL LIQUEFACTION
CATALYTIC EFFECTS
CHEMICAL ANALYSIS
CHEMICAL REACTION KINETICS
CHROMATOGRAPHY
CONSTRUCTION
DESIGN
EXPERIMENTAL DATA
FLUID FLOW
HEAT TRANSFER
HYDROGENATION
LAYERS
NAPHTHA
NAPHTHALENE
OPERATION
PERFORMANCE TESTING
PRESSURE EFFECTS
PYRENE
TEMPERATURE EFFECTS
THERMODYNAMICS
TOLUENE
ALKYLATED AROMATICS
AROMATICS
CHEMICAL REACTIONS
COAL TAR OILS
CONDENSED AROMATICS
DATA
DISTILLATES
ENERGY SOURCES
ENERGY TRANSFER
FOSSIL FUELS
FUELS
HYDROCARBONS
INFORMATION
KINETICS
LIQUEFACTION
NUMERICAL DATA
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
REACTION KINETICS
SEPARATION PROCESSES
TESTING
THERMOCHEMICAL PROCESSES
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction
400201 - Chemical & Physicochemical Properties