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PRODUCTION OF ETHYLENE OXIDE

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ece bedir

on 17 December 2014

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Transcript of PRODUCTION OF ETHYLENE OXIDE

Middle East Technical University
Department of Chemical Engineering
Chemical Engineering Design I
Assoc.Prof. Dr. Yusuf Uludag
Assistant Bengüsu Tezel
PRODUCTION OF ETHYLENE OXIDE
Group Members
Ece Bedir
Görkem Eldem
Meryem Koçyiğit
Tuğçe Bolat

OUTLINE
Introduction
Production Methods
Process Details and Design Equipments
Energy Balance and Cost Analysis

Energy Balance And Utility Requirements
Process Selection
1.Ethylene Chlorohydrin 2. Direct Oxidation
a. Air Based
b. Oxygen Based
Heat of Reactions
Direct Oxidation main reaction
C2H4 + ½ O2 --> C2H4O
DH°298K,reaction = [ DH°298K,EO - (DH°298K,ethylene + ½ DH°298K,oxygen ]
= (-52.6 – (52.4 + 0 ) )
DH°298K= -105 kj/mole = -2386.36 j/g
Q= 7.59 x 10^^8 kJ/h

Side reaction
C2H4 + 3O2 --> 2CO2 + 2H2O
DH°298K,reaction = [ 2(DH°298K,water +DH°298K,CO2 ) - (DH°298K,ethylene + 3DH°298K,oxygen ]
= (2(-285.8 + - 393.5) – (52.4 + 0 ) )
DH°298K= -1411 kj/mole = -11379.00 j/g



Project Background
150,000 tonnes EO production per year
Production Purity 99.5%
Uses of Ethylene Oxide
Ethylene Glycol Production
Antifreeze
Coolant/ Heat tr. Agent
Polyester fibers, films,bottles
Other Chemicals Production
Glycol Esthers
Ethanolamines
Ethoxylates
Market Survey
Majority of the EO Production
Asia (47%)
US (20%)
Europe (18%)
Middle and Africa (15%)
High EO Demand in Middle East, China and South East Asia


Introduction
Chemical and Physical Properties

Colorless liquid or gas
Highly flammable
Soluble in water
MW=44.053 g/mol
MP= 161.46 K
BP=283.6 K
Chlorohydrin Process
Cl2 + H2O → HOCl + HCl
CH2=CH2 + HOCl → OH–CH2CH2–Cl
CH2=CH2 + Cl2 → Cl–CH2CH2–Cl
2 OH–CH2CH2–Cl + Ca(OH)2 → 2 (CH2CH2)O + CaCl2 + 2H2O
Direct Oxidation-Air Based
Direct Oxidation-Oxygen Based
CH2=CH2+1/2O2→CH2CH2O
CH2=CH2+1/2O2→CH2CH2O
CH2=CH2+3O2→2CO2+2H2O
Process Description
ASSUMPTIONS
Desulphurization is done at the before sending the components to the feed
Reactor feed is assumed with the fraction of 0.35 C2H4, 0.17 CO2, 0.08 O2, 0.4 Inert
Overall conversion is taken as 0.8
Single pass conversion assumed 0.1
Basis C2H4 feed is taken 5370 kmol/hr
Ethylene oxide amount is assumed as %0.02 with respect to water in the separation unit

Process Flow Diagram
Utility Cost
Sustainability
C2H4O +2½ O2 →2CO2 + 2H2O

CH2=CH2+3O2→2CO2+2H2O
C2H4O +2½ O2 →2CO2 + 2H2O

Material Balance
Shrinking the Carbon Footprint of a Widely used Chemical
Everyone alive on the planet use something made from ethylene oxide
soda bottles
polyester fibers,
detergents and
anti-freeze.
huge market $30-billion-per-year market
EO puts out about 3.4 million metric tons of carbon dioxide each year,
University of Kansas (KU) Center for Environmentally Beneficial Catalysis design greener ethylene oxide process

THANK YOU
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