Contents & References of Laboratory investigation of gas dehumidification using triethylene glycol solution in hollow fiber membrane contactors.
List:
Chapter One: Introduction .. 2
1-1- Natural gas and its dehumidification. 2
1-2- Problems caused by the presence of water vapor in natural gas. 3
1-3- types of natural gas dehumidification methods. 3
1-3-1- Absorption in liquid by moisture absorbent liquids. 4
1-3-2- Absorption of water by moisture absorbing solid materials. 7
1-3-2-1- silica gel. 10
1-3-2-2- Mobil Sorbid. 10
1-3-2-3- activated alumina. 11
1-3-2-4- activated bauxite. 11
1-3-2-5- molecular sieve. 12
1-2- Membrane processes. 16
1-2-1- Introduction of membrane technology. 16
1-2-2- Membrane separation mechanism. 17
1-2-3- Division of membranes. 18
1-2-3-1- Division based on membrane type. 18
1-2-3-2- Division based on membrane structure. 22
1-2-3-3- division based on the geometric shape of the membrane. 23
Chapter Two: An overview of past research. 28
2-1- History of using common methods for gas dehumidification using absorbent liquids 28
2-2- History of using hollow fiber membrane for gas dehumidification. 30
Chapter Three: How to do the work. 33
3-1- Method of conducting experiments. 33
3-1-1- moisture absorbent liquid. 33
3-1-2- Experiments.. 35
3-1-2-1- Description of the air dehumidification laboratory unit. 35
3-1-2-2- Description of the test. 42
3-1-3- extracting the results. 44
3-2- Simulation method using COMSOL software. 45
3-2-1- Governing equations. 47
3-2-1-1- Concentration equations inside membrane fibers (liquid phase). 48
3-2-1-2- concentration equations in the membrane. 50
3-2-1-3- concentration equations in the shell (gas phase). 50
3-2-2- Solubility of water vapor in triethylene glycol solution. 52
3-2-3- water penetration coefficients. 55
3-2-3-1- water penetration coefficient in air. 55
3-2-3-2- water penetration coefficient in triethylene glycol solution. 55
3-2-3-3- water penetration coefficient in the membrane in a completely dry state. 56
3-2-3-4- water penetration coefficient in the membrane in the state of complete wetting. 57
3-2-4- Numerical solution of simulation equations. 58
3-3- Modeling method using plug assumption. 59
3-3-1- Governing equations. 59
3-3-1-1- Concentration equation inside membrane fibers (liquid phase). 59
3-3-1-2- Concentration equations in the membrane. 61
3-3-1-3- concentration equations in the shell (gas phase). 61
3-3-2- Numerical solution of equations. 62
Chapter four: discussion and results. 65
4-1- Introducing the investigated parameters in the water vapor absorption process and investigating their effects. 66
4-1-1- The influence of the relative humidity percentage of the incoming air. 66
4-1-1-1- The effect of the percentage of relative humidity of the incoming air on the efficiency of water vapor removal and the dew point temperature of the outgoing air 66
4-1-1-2- The effect of the percentage of relative humidity of the incoming air on the rate of mass transfer of water vapor. 69
4-1-2- Effect of air flow rate. 71
4-1-2-1- The effect of air flow rate on water vapor removal efficiency and the dew point temperature of the outlet air 71
4-1-2-2- The effect of air flow rate on water vapor mass transfer flux. 73
4-1-3- Effect of liquid flow rate. 75
4-1-3-1- The effect of liquid flow rate on water vapor removal efficiency and dew point temperature of outlet air 75
4-1-3-2- The effect of air flow rate on water vapor mass transfer flux. 76
4-1-4- the effect of triethylene glycol concentration. 78
4-1-4-1- The effect of triethylene glycol concentration on water vapor removal efficiency and the dew point temperature of the outlet air 78
4-1-4-2- The effect of triethylene glycol concentration on water vapor mass transfer flux. 80
4-1-5- Effect of flow direction. 81
4-1-5-1- Effect of flow direction on water vapor removal efficiency. 82
4-1-5-2- The effect of flow direction on the dew point temperature of the outlet air. 83
Chapter five: conclusions and suggestions. 85
5-1- Conclusion.. 85
5-2- Recommendations
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