Under-standing the technological process of Dinh Co Gas Processing Plant and calculating the technical parameters of C-01De-ethanizer tower to achieve the input gas flow of 6.0 million m3 per day.

CHAPTER 1 – NATURAL GAS FUNDAMENTALS [5, 6]
Chapter 1 –Natural Gas Fundamentals [5, 6]

Concept of Natural gas
Natural gas is composed primarily of methane (𝐶
𝐻
4) with minor amounts of the paraffin hydrocarbon family, ethane
𝐶
2
𝐻
6propane
𝐶
3
𝐻
8) and butane
𝐶
4
𝐻
10Non-hydrocarbon constituents include
𝑁
2,
𝐻
2
𝑆, 𝐶
𝑂
2, 𝐻𝑒, and water vapor.
Natural gas is the most energy efficient fossil fuel; it offers important energy saving benefits when it is used instead of oil or coal. Natural gas is not only as a fuel but also a source of hydrocarbons for petrochemical feed-stocks and a major source of elemental sulfur, an important industrial chemical.

Natural gas origin and sources
The origin of natural gas assumes that natural gas hydrocarbons come from organic matter ( the remains of land and aquatic- organisms)

Natural gas composition and Classification
Chemical composition
Classification

Natural gas Properties
Equations of state and gas density [1]
Equations of state :
Any equation correlating P,V and T is called an equation of state.
The Boyle -Charles Laws state that P times V is proportional to T
The ideal gas concept in practical form is : 𝑃𝑉=𝑛𝑅𝑇
Where:
P = absolute pressure (kPa);
V = volume (
𝑚
3);
n = number of mols of gas of volume V at P and T (kmol);
T = absolute temperature (K) ;
R = universal gas constant.
R= 8.314 𝑘𝑃𝑎
𝑚
3
𝑘𝑚𝑜𝑙
𝐾.
Gas density :
Because of its simplicity, The net result in practical form by a compressibility factor, z is: 𝑃𝑉 =𝑧𝑅𝑇.
It may be written in the form: 𝜌
𝑃
𝑀𝑊
𝑧𝑅𝑇.
When the purpose is to calculate gas density at P and T. The units of ρ will be in
𝑔
𝑐
𝑚
3
𝑘𝑔
𝑚
3, 𝑜𝑟
𝑘𝑔
𝐿.
Ideal gas density :
𝜌
𝑔𝑝
𝑃
𝑀𝑊
𝑅𝑇=12.03
𝑃
𝑀𝑊
𝑇.
Where :
MW= the molecular weight ( kg/kmol) and
𝜌
𝑔𝑝= the ideal ga s density ( 𝑘𝑔
𝑚
3).

Saturated-vapor pressure
Moisture and dew-point [Hàm ẩm và điểm sương của khí]
Viscosity
Critical state of gas [Trạng thái tới hạn của khí ]
Heat fire [ Nhiệt cháy ]
Explosion limits {Giới hạn cháy nổ }

CHAPTER 2– TECHNOLOGY PROCESS OF DINH CO GAS PROCESSING PLANT [7]
Chapter 2 – Technology process of Dinh Co gas processing plant [7]
2.1. Overview of Dinh Co gas processing plant
Process description
Feedstock
Product
LPG
Sales gas
Condensate
Main equipment
Slug catcher
Water separation process
C-01 De-ethanizer
C-04 Gas stripper
C-02 stabilizer
C3/C4 Splitter
Operating modes
AMF mode
MF mode ( by design )
GPP mode ( by design )
MGPP mode
Technology of gas processing in GPP mode
Dehydration and regeneration
GPP condensate processing
GPP gas chill down and rectifier
GPP De-ethanizer
GPP gas flow and pressure control

CHAPTER 3- THEORETICAL BACKGROUND OF DISTILLATION COLUMN
Chapter 3 – Theoretical Background of Distillation Column
3.1. Vapor- Liquid Equilibrium [1, 2]
3.1.1. Concept
3.1.2. Equilibrium Vaporization Ratio
The equilibrium vaporization ratio is defined by

𝐾
𝑖
𝑦
𝑖
𝑥
𝑖
𝑃
𝑖
𝑠
𝑃 (3.1)
Where
𝑦
𝑖,
𝑥
𝑖 are the following mole fractions of component “i’’ in the pure liquid and vapor state.
Values of
𝑦
𝑖,
𝑥
𝑖 are specified or found from sampling and the resultant analyses. This
𝐾
𝑖 may be incorporated into a material balance around a separator, where
𝑧
𝑖 is mole fraction of any component in total feed stream to separation vessel ;
𝑦
𝑖 is mole fraction of any component in the vapor phase ;
𝑥
𝑖 is mole fraction of any component in the liquid phase ;
𝐾
𝑖 is equilibrium constant.
3.1.3. Relative volatility
For systems where the liquid phase is an ideal solution that the gas phase follows the ideal gas law, it is possible to formulate relative volatilities that are function only of temperature. For