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Styrene Production (G6)

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Styrene Production

EP313 Chemical Process Simulation and DesignGREAT KAVIMANANGANESH LIEWTRILOKESHLOHANTEEBAN KARANJIT SINGHGROUP MEMBERS

INTRODUCTIONStyrene monomer is an aromatic hydrocarbon which, under normal conditions, is a clear, colorless, flammable and toxic liquid.

Definition

USES OF STYRENE

PRODUCTIONReaction Ethylbenzene is dehydrogenated to styrene by the following reaction:

Dehydrogenation of Ethyl benzene

STYRENE produced per hour 520 kgmol/hr.STYRENE produced for 1 year is estimated 4500 tonne/hr.Quality of product produced : STYRENE 99% E-BENZENE 1%

PRODUCTION SPECIFICATIONProcess Flow Diagram

SIMULATION OF PSD (unisim design)

REACTIONS INVOLVED

REACTOR SYSTEM

RESULTSStream and material details

RAW MATERIAL INPUT

BY-PRODUCTS

WASTE WATER

ACTUAL CONVERSION IN PFR REACTOR

STYRENE PRODUCT

GRAPHS (DISTILLATION COLUMN)

ANALYSIS AND DICUSSIONIt has been found that the yield of styrene product is low and limited when two PFR (Plug Flow Reactor) were used.

Instead of using two PFR, an additional PFR included in the process in order to increase the styrene product. The yield successfully achieved 144.5554 gmol/s at the end of the simulation.In distillation column, the pressure in condenser reboiler has been altered so that the output stream will have the exact pressure for the maximum yield of styrene product.

Ethylbenzene which known as raw material in this process, has been designed for recycling to reduce the manufacturing cost .

The hydrogen stream is further purified as a source of hydrogen elsewhere in the plant.

The small amount of benzene and toluene is distilled and either incinerated for its fuel value or returned to the ethylbenzene process (since the benzene raw material always has some toluene impurity).

Economic analysisCONCLUSION Ethylbenzene feed is mixed with recycled ethylbenzene, heated, and then mixed with high-temperature, superheated steam.

The reactants then enter three adiabatic PFR reactors with interheating.

The products are cooled, producing steam from the high-temperature reactor effluent.

The cooled product stream is sent to a three-phase separator, in which light gases (hydrogen, methane, ethylene), organic liquid, and water each exit in separate streams.

The hydrogen stream is further purified as a source of hydrogen elsewhere in the plant.

The small amount of benzene and toluene is distilled and incinerated.

The ethylbenzene and styrene stream is distilled to separate unreacted ethylbenzene for recycle from the styrene product.HYSYS Multiple Reactions - Styrene Prepared by Robert P. Hesketh(http://users.rowan.edu/~hesketh/0906-316/Handouts/HYSYS_styrene_multiple_reactions2005.pdf)Styrene Production file:///C:/Users/kavi/Searches/Downloads/styrene12.pdf

Styrene Process flow Diagram Final GP2 Presentation(Styrene Process -Salama).pptx

REFERENCESEND

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