PROCEDURE1. Open Aspen HYSIS, click new.

2. Select component list and choose the components that are required.

3. Select fluid packages and choose Peng Robinson.

4. Select simulation and now we can start to draw the PFD. Every parameter given must be inserted in every process unit.

5. Insert the stream number and the properties given in each and every stream.

a) Input of stream number and properties in the Cooler.

b) Input of stream number and properties in the Valve.

c) Input of stream number and properties in the Distillation column.

PROCESS FLOW DIAGRAM (PFD)

STREAM SUMMARYMaterials stream

Composition

Energy streams

QUESTIONS 1. What is the temperature of the outlet stream of the condenser?

The temperature of the outlet stream of the condenser is 140.1 0C

2. What are the mole fractions for ammonia and water in the vapor and liquid stream of the separator?

AmmoniaWater

Vapour stream0.82380.2042

Liquid stream0.17620.7958

3. Determine the mass flow rate for each outlet stream of the separator. Stream 4 (vapour stream) = 7.616 x104 kg/hStream 5 (liquid stream) =1944 kg/hDISCUSSIONS

In this separation of ammonia and water, there are 3 units operation that involves which are condenser, valve and separator. Each process unit have their own function in order to make the separation process occurs effectively. This process used Peng Robinson as the fluid package in the system. Aspen Hysis version 8.7 was used to perform the simulation and make sure all the parameters such as the temperature, pressure, composition and phase of the mixture can be discovered.

First, feed stream containing the mixture of ammonia and water in vapour phase enter the condenser at the pressure of 1724 kPa and temperature of 143.60C. The composition of the mixture is 80 wt% ammonia. In the condenser, heat is removed at a rate of 1700kW. The temperature outlet of the condenser is reduced to 140.1 0C with the same pressure since the condenser is only reducing the temperature of the fluid to make it condense. The vapour phase is 0.9650 after passing the condenser.

The pressure at the outlet stream is then reduced to 1034 kPa by using a valve. The function of valve in this process is to lower the pressure before entering the separator. The pressure of 1724 is lowered to 1034 after passing the valve. The decrease in the pressure will directly decrease the temperature in the stream after the valve which is stream 3. The temperature leaving the valve is recorded to be 123.70C.

The mixture leaving the valve is then separated in the distillation column. In this process unit, the mixture is separated by the difference of boiling point. The upper stream is the vapour stream while the bottom is the liquid stream. The vapour stream contains high percentage ammonia while the bottom stream contains high percentage of water. It was recorded that the distillate contain 0.8238 composition of ammonia. This shows that this separation is producing 83 percent purity of ammonia. However, in normal practice, it is sometime very hard to be able to separate a higher percent of ammonia in water.

EXAMINATION RESULT FOR SEMESTER 20144

Student ID:2012313407Name:MUHAMMAD SHAHID BIN ISMAIL

Programme:EH220 - BACHELOR OF ENGINEERING (HONS) CHEMICAL

CGPA:3.45GPA:3.35

NO.COURSESGRADERESULT

1.BEL499 - COMMUNICATION AND INTERPERSONAL SKILLS ( 2.0 )B+LU

2.BGM451 - GERMAN LANGUAGE II ( 2.0 )ALU

3.CHE515 - INSTRUMENTAL CHEMISTRY FOR ENGINEERS ( 3.0 )B+LU

4.CHE555 - NUMERICAL METHODS AND OPTIMIZATION ( 3.0 )C+LU

5.CHE574 - CHEMICAL ENGINEERING LABORATORY III ( 1.0 )B-LU

6.CHE594 - CHEMICAL REACTION ENGINEERING ( 3.0 )ALU

7.CPE553 - CHEMICAL ENGINEERING THERMODYNAMICS ( 2.0 )A-LU