Coal conversion to liquid and gaseous hydrocarbons in a cross-flow moving-bed reactor

Conference · Wed Oct 01 04:00:00 EDT 1975

OSTI ID:7366790

Dang, V D; Steinberg, M

A study of coal hydrogenation has been performed in a cross-flow moving-bed reactor. Coal particles move horizontally in packed form in the reactor, while H/sub 2/ moves vertically. Temperature distributions of both gas and solid are obtained by solving the energy equations for a packed bed. Weight fractions of carbon and its gas and liquid products can be obtained by using a three-step coal hydrogenation model as a first approximation. The problem is solved numerically for some practical operating conditions of a reactor by using a CDC 7600 computer. The effect of several operating parameters on the temperature distribution of the reactor is examined. Increasing the gas residence time decreases the temperature of both solid and gas phases. Increasing the solid-phase residence time increases the temperature of both phases. Hydrogen partial pressure does not have any effect on the temperature field. An example of the application of the model to a specific set of conditions is presented. High coal conversion yield (60 percent or higher) can be obtained in the assumed reactor for the following conditions: H/sub 2/ partial pressure, 100 to 400 atm; solid velocity, 30 to 100 cm/sec; particle size, 50 to 60 ..mu..m; H/sub 2/ velocity, 25 to 30 cm/sec.

• Research Organization: Brookhaven National Lab., Upton, N.Y. (USA)
• OSTI ID: 7366790
• Report Number(s): BNL-20754R; CONF-760402-5
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010403 -- Coal & Coal Products-- Hydrogenation-- (-1987)
010404* -- Coal
Lignite
& Peat-- Gasification
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
COAL GASIFICATION
COMPUTERS
CRYOGENIC FLUIDS
ELEMENTS
ENERGY SOURCES
FLUID FLOW
FLUIDS
FOSSIL FUELS
FUELS
GAS FLOW
GASIFICATION
HYDROCARBONS
HYDROGEN
HYDROGENATION
MATHEMATICAL MODELS
NONMETALS
ORGANIC COMPOUNDS
PRESSURE DEPENDENCE
PRODUCTION
TEMPERATURE DISTRIBUTION
TIME DEPENDENCE