Simulation and Optimization of the Utilization of Triethylene Glycol in a Natural Gas Dehydration Process

2017 ◽  
Vol 12 (4) ◽  
Author(s):  
Zykamilia Kamin ◽  
Awang Bono ◽  
Lek Yan Leong
Keyword(s):  
Natural Gas ◽  
Water Concentration ◽  
Triethylene Glycol ◽  
Circulation Rate ◽  
Processing Plant ◽  
Dehydration Process ◽  
Simulation And Optimization ◽  
Aspen Hysys ◽  
Natural Gas Dehydration ◽  
Formation Of Hydrates

AbstractThe dehydration unit of a plant that processes natural gas uses triethylene glycol (TEG) as an absorbent to remove water from the gas to prevent blockages in pipes due to the formation of hydrates. Although TEG is recyclable, it is usually lost in the system due to vaporization and carryover, which results in economic issues. Therefore, it is necessary to optimize the dehydration process to achieve the allowable water concentration in the gas, to minimize the use of energy, and to minimize the loss of TEG. Experimental set was designed using Design Expert software by utilising data from Farashband gas processing plant, Iran and subsequently, fed to ASPEN HYSYS to construct and simulate the dehydration process. The chosen affecting parameters to the process were the (1) lean glycol circulation rate, (2) the temperature of the reboiler, and (3) the number of trays in the contactor column. Whereas, the response parameters included the (1) amount of glycol that was lost, (2) the reboiler duty, (3) the concentration of water in the dry gas, and the (4) temperature at which the hydrate formed. Then, these data were optimized using the response surface methodology (RSM). The results indicated that the optimum conditions within the experimental range conducted in this study of process parameters chosen, of the lean glycol circulation rate, the temperature of the reboiler, and the number of trays in the glycol contactor column for the gas dehydration process for the plant were 3944 kg/hr, 180 °C, and three trays, respectively.

scholarly journals Process Simulation and Optimization of Natural Gas Dehydration Process using Aspen Hysys

2018 ◽  
Vol 8 (9) ◽  
pp. 644-649
Keyword(s):  
Natural Gas ◽  
Process Simulation ◽  
Fossil Fuels ◽  
Research Work ◽  
Dehydration Process ◽  
Simulation And Optimization ◽  
Aspen Hysys ◽  
Natural Gas Dehydration ◽  
Turbo Expander ◽  
Process Simulation And Optimization

Natural Gas is More Efficient than Other Forms of Fossil Fuel. Natural gas produces more energy than any of the fossil fuels. Although the primary use of natural gas is as a fuel, it is also a source of hydrocarbons for petrochemical feedstocks and a major source of elemental sulfur, an important industrial chemical. The process simulation and optimization of natural gas dehydration process including mono ethylene glycol (MEG) injection and its regeneration process is studied in this research work. This study also carried out the operation parameters and optimization. The simulation is carried out using Aspen-HYSYS. The effect of replacement MEG by DEG and influence of replacement of Chiller by a turbo expander refrigeration technique on the DPCU operation was studied. The result obtained for optimum parameters like inlet pressure and temperature of the LTS are studied and comparing chiller and expander to maximize NGL are presented. The study recommends to use the expander instead of the chiller. The the economic evaluation of the proposed modification is presented in this study.

scholarly journals Comparison of gas dehydration methods based on energy consumption

2016 ◽  
Vol 20 (2) ◽  
pp. 253-258
Author(s):  
B.S. Kinigoma ◽  
G.O. Ani
Keyword(s):  
Energy Consumption ◽  
Natural Gas ◽  
High Pressures ◽  
Energy Requirement ◽  
Chemical Properties ◽  
Triethylene Glycol ◽  
Design Engineers ◽  
Natural Gas Dehydration ◽  
Physical And Chemical ◽  
Low Pressures

This study compares three conventional methods of natural gas (Associated Natural Gas) dehydration to carry out the dehydration process and suitability of use on the basis of energy requirement. These methods are Triethylene Glycol (TEG) absorption, solid desiccant adsorption and condensation. Analyses performed were based on dehydration of Natural Gas saturated with 103Nm3/h water content at a temperature range of -10O C to 30oC, and gas pressure variation between 7MPa and 20MPa. This analysis and study showed that energy required for all three processes decreases with increase in pressure, but condensation dehydration requires the least energy at high pressures. Results obtained shows that, both at high pressures and low pressures, TEG dehydration is most suitable and in cases where very low Tdew is required, solid desiccant adsorption is preferable. In conclusion, the findings in this paper will aid natural gas process design engineers to decide on what method to use base  on energy consumption and on the physical and chemical properties of the final products.Keywords: Dehydration, Absorption, Desiccant, Condensation, Triethylene Glycol (TEG)

scholarly journals Towards zero carbon dioxide concentration in sweet natural gas product from amine sweetening plant

2021 ◽  
Vol 1195 (1) ◽  
pp. 012038
Author(s):  
Abdulqader Bin Sahl ◽  
Tharindu Siyambalapitiya ◽  
Ahmed Mahmoud ◽  
Jaka Sunarso
Keyword(s):  
Natural Gas ◽  
Carbon Dioxide Concentration ◽  
Circulation Rate ◽  
Base Case ◽  
Step Method ◽  
Aspen Hysys ◽  
Process Modification ◽  
Zero Carbon ◽  
Plant Data ◽  
Simulation Results

Abstract This work presents a two-step method to reduce CO2 concentration of sweet natural gas product from amine sweetening plant via amine blending (Step 1) followed by minor process modification (Step 2). In Step 1, an industrial natural gas sweetening plant was simulated using Aspen HYSYS and the simulation results were validated against the plant data. Afterwards, different blends of methyl diethanolamine and monoethanolamine (MDEA-MEA) and methyl diethanolamine and diethanolamine (MDEA-DEA) were investigated. Then the optimum amine blend of 28 wt.% MDEA and 10 wt.% MEA was reported. The optimum amine blend achieved a significant reduction in CO2 concentration of sweet natural gas of 99.9% compared to the base case (plant data). In Step 2, two types of amine stream splits, i.e., lean amine stream split and semi-lean amine stream split were studied. The study covered split stream amount, absorber recycle stage, and regenerator stage withdrawal. Both types of stream splits attained a significant reduction in CO2 concentration of sweet natural gas product and amine circulation rate compared to Step 1. However, the semi-lean amine stream split was superior to lean amine split with 69.1% and 63.6% reduction in CO2 concentration of sweet natural gas and lean amine circulation rate, respectively.

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