A slurry is a thin sloppy mud or cement or, in extended use, any fluid mixture of a pulverized solid with a liquid (usually water), often used as a convenient way of handling solids in bulk
Catalysts are transition elements cobalt, iron, and ruthenium,nickel.(2n + 1) H2 + n CO -> CnH(2n+2) + n H2O
Thevaporbubblescarryliquiddropletswiththemasasprayordropletstotheplateabove.•It contaminates the higher‐purity liquid of above plate with the lower‐purity liquid of plate below
Catalysts are a mixture of copper, zinc oxide, and alumina.The vapor bubbles carry liquid droplets with them as a spray or droplets to the plate above.
Muhammad Umar Khan
Introduction to Slurry Reactors
Types & Construction
Operation and Working
Start up and Shut down
Advantages & disadvantages
Any mixture of solid
liquid or a gas gas is called
Sloppy mud, cement or
mixture of additives in
Slurry reactors are three-phase
reactors, meaning they can be
used to react solids, liquids,
and gases simultaneously.
They usually consist of a solids
suspended in a liquid, through
which a gas is bubbled. They
can operate in either semi-
batch or continuous mode.
Types Of Slurry Reactors are :
Bubble Column Reactor
Fischer Tropsch Reactor
Slurry Batch Reactor
Made of glass or
Hold Media and
are mounted on it.
Used to introduce air in
Install at the bottom, consist
of tube and holes for escape
air and gases.
Water is circulated
through these coils to
lower the temperature
inside the reaction
Heat transfer probes
Mass Transfer Probes
Hydro-cloning section is
attached separate to the
A Hydro-clone is a static
device that applies
centrifugal force to a liquid
mixture so as to promote
the separation of heavy
and light components.
Carbon monoxide and hydrogen react over a
catalyst to produce methanol.
Catalyst is a mixture of copper, zinc oxide, and
At 5–10 MPa (50–100 atm) and 250 °C.
CO + 2 H2 → CH3OH
problem cause consequence solution
Hot spot formation. Due to non uniform
Rapid removal of large
heat of a reaction.
Agglomeration Uneven distribution of
Very high superficial
velocity of the gas
Mass transfer rate will
product selectivity will
Change the type of
Low the velocity of
Sparger is not working Nozzle may be choked Very low flow rate of
Clean or replace the
problem cause consequence solution
of solid catalyst in the
Agitation will not be
Orifice of the sparger
Over time Fine particles of
catalyst will enter in
the sparger and chock
Change the orifice and
clean the sparger.
High heat capacity to provide good temperature
Potentially high reaction rate per unit volume of
reactor if the catalyst is highly active.
Easy heat recovery.
Adaptability to either batch or flow processing.
The catalyst may readily be removed and replaced
if its working life is relatively short.
Because of high intraparticle diffusion rate, small
particles can be used.
Generation of fine particles by abrasion of the
Catalyst removal by filtration may provoke problems
with possible plugging difficulties on filters, further
time of operation, and the costs of filtering systems
may be a substantial portion of the capital
Higher catalyst consumption than that of fixed - bed
Back mixed flow and the volume of the reactor are
not fully utilized.
Stack gas scrubbing with lime or magnesia.
Waste water treatment.
Oxidation of toluene to benzoic acid.
Ethylene oxidation to acetaldehyde.
Olefin polymerization using catalyst suspension.
Fatty oil hydrogenation with catalytic
On January 11, 2006, an
explosion and fire
occurred at the City of
Daytona Beach, Bethune
Point WWTP in Daytona
Beach, Florida. Two
employees died and one
was severely burned
a worker using a cutting torch accidentally
ignited vapors coming from the methanol
storage tank vent.
An explosion inside the tank followed,
causing the attached piping to fail and
release about 3,000 gallons of methanol,
Gandhi, B.; Prakash, A.; Bergougnou, M. A.
Hydrodynamic Behavior of Slurry Bubble Column at
High Solids Concentrations. Powder Technol. 1999, 103,
Sherwin, M. B.; Frank, M. C. Make Methanol by Three
Phase Reaction. Hydrocarbon Process. 1976, 55, 122.
BAHA E. ABULNAGA, P.E. Slurry systems handbook.
Deckwer, W.-D.; Bubble Column Reactors; Wiley, 1985.
Shimizu K, Takada S, Minekawa K, Kawase Y.
Phenomenological model for bubble column reactors:
prediction of gas holdups and volumetric mass transfer
coefficients. Chem Eng J 2000;78:21–8.