College of Engineering and Petrolume Chemical Engineering Department Kuwait University College of Engineering and Petrolume Chemical Engineering Department Plant Design ChE 491 Ethanol Production from Carbon Dioxide group # 3 Presented By: Fatma Jawad Jarkhi Dana Saad Almyias Fatma Mahmood Abul Supervised By: Prof. Mohamed A. Fahim Eng.Yusuf Ismail Ali

Outlines: -Introduction. -Ethanol Production. - Assumption. - Hysys simulation. -Car engine. - Car engine process. - Conclusion.

Introduction Ethanol Production: In our project , we will capture the Carbon dioxide ,then use it to produce Ethanol according to the following reaction : 2 moles of carbon dioxide will react with 6 moles of hydrogen that means the composition of the feed gas was H2/CO2 = 3/1. The reaction will carried out at 250°C and 49 atm.

Assumptions: 1. Fluid package used is Wilson. 2. The feed enters the process at 25°C and 1atm with flow rate based on 100 ton/day of CO2. 3. The Reactor type is Gibbs reactor (with no pressure drop). 4. A compressor was used to increase the pressure of the stream to 49 atm, and then cooler is added to decrease the Temperature to 250°C. 5. The pressure drop in the first Distillation Column is 2.96 atm with full reflux condenser, and from the second one is 4.94 atm with partial condenser. 6. 25 trays are used in the first Distillation Column to separate Ethanol from water, while 30 trays are used in the second one.

Equipment used in Hysys simulation: * 3-Mixers. * Compressor. * 6-Coolers. * 3-Heaters. * 4- Gibbs Reactors. * 2-Distillation Columns . * 4-Separators. * Spliter . * Valve .

Conversion Reactor 43.88% ERV- 100 52.11% ERV- 101 65.19% ERV- 102 82.29% ERV- 103

Comparison between Conventional method and our method: Conventional process operates at a temperature range of 230-300°C and at a pressure of 60-80 atm with a conversion of 4%. Inspite of that the pressure of our process is less than the pressure of the conventional process, but our conversion is higher than that of the conventional method. Also the reaction in our process is more exothermic and thermodynamically feasible than the conventional process.

2- Car engine : In our project , we did a simulation for a car engine , to reduce the amount of CO2 that emits from cars , to reduce the environmental impacts. This is will be useful in increasing the power of the car engine by converting the CO2 to ethanol and re-used it as a fuel.

Assumptions : Process description : - Ethanol that was produced in the first plant ,will be used as fuel for cars. - Ethanol and Oxygen will fed the reactor then a complete combustion will occur . C2H5OH + 3O2 2CO2 + 3H2O Assumptions : 1- In car engine we used Wilson for fluid package in the simulation due to the component specifications. 2- Two streams inter the feed , pure ethanol at 25 °C, 1 atm with volume flow rate 10 L/day ,and pure Oxygen at 25 °C, 1 atm with volume flow rate of 14.5 L/day.

3- First reactor was used conversion reactor and not equilibrium reactor to have complete combustion, but the second reactor was Gibbs reactor. C2H5OH + 3O2 2CO2 + 3H2O 2CO2 + 6H2 C2H5OH + 3H2O 4- There is no pressure drop in all the reactors . 5- A compressor was used to increase the pressure of the stream. 6- Cooler was used to reduce the temperature . 7- A Component splitter was used to separate ethanol from water. 8- By assuming 100 Km/day with 10Km/L; car consumes 10 L/day.

HYSYS description of car engine process : In this simulation, Ethanol stream is taken from Ethanol process that we produce it in the first plant , and Oxygen stream is taken from air , both streams inter the reactor as a feed for engine car process. Equipment used in hysys simulation : Reactor (CRV-100). Mixer ( MIX 100 ) . Compressor (K-100). Cooler ( E 100 ) . Reactor ( ERV 100 ) . Mixer (MIX 101) . Component Spliter (X 100) . Recycle ( RCY-10) .

Block Flow diagram of car engine ْFig 2. H2 Cooler H2 H2 H2 Mixer Compressor CO2 CO2 CO2 O2 Reactor Ethanol H2O Ethanol Ethanol H2 Ethanol Mixer Reactor Splitter CO2 H2O H2O H2O

Car engine process

Conclusion : To reduce carbon dioxide effect on the environment it will be used to produce ethanol . 100 ton/day of CO2 will give us 51.344 ton/day of ethanol with purity 97% . Ethanol that produced in our plant will be used as fuel for cars . As a result of ethanol combustion in the car CO2 is produce, it will be converted to ethanol again which will be re-used as fuel.