Universiti teknologi petronas, seri iskandar,tronoh,perak. Pdf natural gas dehydration using triethylene glycol teg. Natural gas dehydration using triethylene glycol teg. Software that has ruined the lives of chemical engineers since 1994. Simulation of gas dehydration on an fpso using aspen hysys. The natural gas dehydrating plant was designed and simulated using hysys software with process conditions of 6200kpa and 30. Depending on the application, meis process design is based on promax or hysys software, will limit plot and height of the dehydration unit, and limit the volume of gaseous vocs emissions.
This is a dacron316ss composite mesh pad designed specifically for. Optimization of natural gas dehydration using triethylene. Psv sizing for contactor tower in teg dehydration zoobie chemical 10 jan 06 09. Simulation and optimization of natural gas processing plant. Introduction the use of glycol to dehydrate gas streams is an established method that has proven its functionality and versatility over many years. In natural gas systems, removing water vapor reduces pipeline corrosion and eliminates line blockage caused by hydrate formation. Water dew point check using hysys chemical plant design. Chapter 18 of gas conditioning and processing 1 presents the process flow diagram and the basics of glycol units. Yes, you may use a software simulation program to model glycol dehydration. Removal of water from natural gas by lowering the dew point temperature of the natural gas. Aspen hysys and promax are commonly used process modelling and simulation software in gas dehydration 1618 as well as other gas. Teg circulation rate, numbers of theoretical trays in the absorber and the stripping gas column, feed gas. The dehydration of natural gas is very essential in the gas processing industry to remove water vapor. Natural gas is an important energy source among other sources of fossil fuels.
With the addition of the cubicplusassociation cpa package in v10, aspen hysys can be used to model dehydration with teg, meg and deg. How to remove water vapour in natural gas dehydration teg glycol by hysys by karwan kamal how to download and install aspen technology v9 hysys with karwan kamal s. With the use of hysys software, natural gas dehydration plant was designed. Simulation and optimization of the utilization of triethylene glycol in. Commercial process simulation programs used for glycol dehydration are aspen plus, aspen hysys, proii and. This work was limited due to financial constraint, difficulty arising from the software used hysys. The objective of this experiment is to carry out a simulation on teg dehydration unit using aspenhysys process software. Hysys simulation diagram for typical gas dehydration unit. With all units optimally specified during the process, the lean teg inflow rate was varied with the water content in the dry gas product stream of the contactor column. Glycol dehydration is a liquid desiccant system for the removal of water from natural gas and natural gas liquids ngl. Hence, for dehydration only to pipeline water specifications, a circulating teg system will almost always be selected.
Glycols typically seen in industry include triethylene glycol teg, diethylene glycol deg, ethylene glycol meg, and tetraethylene glycol treg. Glycol dehydration systems are not only efficient at removing water from a natural gas stream, they also remove benzene, toluene, ethylbenzene, and xylene btex as well as other volatile organic compounds vocs. Develop reasonable analysis of teg dehydration performance. Results obtained show that water content in natural gas stream from reservoirs can be reduced to the pipeline specification limit. Triethylene glycol teg is the most common solvent used 6. Teg glycol dehydration hysys simulation, help chemical.
Six different teg flowrates were used for the simulation. Optimization of natural gas dehydration using tri ethylene glycol was carried out using aspen. The process of dehydration by using teg is absorption, involves the use of a liquid desiccant to remove water content from the gas. The natural gas dehydrating plant was designed and simulated using hysys software with process conditions of 6200kpa and 300 c and gas flow rate of 10mmscfd were inputted into the software and simulated.
This is important in an fpso since the removal of water from natural gas is necessary before processing, and due to the fact that natural gas from the reservoir contains large amount of water which can cause several problems. Thus, of the four glycols, teg is the best suited for dehydration of natural gas. Results obtained show that for a teg flow rate of 25. Mohd aiman bin mohd noor, mohd aiman 2010 analyzing triethylene glycol teg gas dehydration system performance of a gas processing plant gpp with hysys modeling. Association cpa equation of state that can be used to model the gas dehydration with teg, eg, and deg, especially in the aspen hysys software.
The collective components constituting a teg dehydration unit is thoroughly described together with giving an insight into the design methods used for designing a teg dehydration process. Hello everyone, i am currently working on a natural gas treating project for an upstream facility. The 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. Sensitivity analysis and process optimization of a natural. Process simulation has become an essential tool for. In this tip of the month totm, the effect of stripping gas rate on the regenerated lean teg concentration for several operation conditions will be studied. On the other hand, if your objective is to recover hydrocarbons and remove water simultaneously, then a low temperature process with meg injection may be the best choice. This is important in an fpso since the removal of water from natural gas is necessary before processing, and due to the fact that natural gas from the reservoir contains large amount of water which can cause several problems to downstream processes and equipment. Water dew point check using hysys hookem mechanical 28 nov 03 08.
Benzene emissions calculations for teg units by glycalc. The impact of stripping gas flow rate on triethylene glycol losses. Pdf the dehydration unit of a plant that processes natural gas uses. If structured packing is used here it should be designed for a maximum fs of 2. Aspen hysys has historically employed the glycol property package for teg. The entire dehydration process has also been simulated in hysys, with two thermodynamic packages. When hysys is having a bad day, prepare for endless frustration with a simple unsloved or consistancy error, and when finally allowing your. Natural gas dehydration teg glycol by hysys with karwan. Optimization of natural gas dehydration using triethylene glycol was carried out using aspen hysys process software and regression analysis. Glycalc has been the software of choice for regulatory agencies in north america with respect to estimating benzene emissions from glycol. The interesting points of this example lie in the use of the absorption module for the contactor model and in the representation of two columns connected in series the teg regenerator and the teg stripper by a single prosimplus stripper module. This paper discusses the dehydration modeling technology available with aspen hysys in v10 and above. Technical and economic evaluation of triethylene glycol.
In this process, a hygroscopic liquid is used to contact the wet gas to remove water vapor from it. I am having issues with converging the glycol regenerator. I am currently trying to model a teg dehydration unit in hysys. Results obtained shows that between a teg rate of 53lhr and 70lhr, the water content is between acceptable range. How to remove water vapour in natural gas dehydration teg glycol by hysys by karwan kamal how to download and install aspen.
To that purpose, they performed a sensitivity analysis and showed that the increase in stripping gas rate leads to higher lean teg purity and. Absorption glycol dehydration process is one of the easy and vigorously used processes. Three different simulation tools are included in the evaluation. Aspen hysys software was used as a simulation tool for the dehydration of the gas using triethylene glycol teg as an absorbent for the removal of water vapour. During the course of this work the simulation software hysys v. I do not own this song, all credit and rights goes to the band and the writers. Teg glycol dehydration hysys simulation, help posted in chemical process simulation. Develop accurate plant simulation of gpp using hysys software. Optimization of triethylene glycol dehydration of natural gas. In order to ensure design options meet the necessary requirements of saving capital, solvent or energy costs, thermodynamic modeling and a holistic view of operations is needed. Optimization of triethylene glycol dehydration of natural. Simulation natural gas dehydrating plant was designed and simulated using hysys software.
In order to ensure design options meet the necessary requirements of saving capital, solvent or energy costs, th. Develop accurate plant simulation of gpp using hysys software 2. V10, aspen hysys can be used to model dehydration with teg, meg and deg. This study therefore seeks to proffer solutions for the optimization of the niger delta gas plant dehydration process using the hysys simulator. Validation of the cpa property package dehydration units are often overdesigned, resulting in high capital or operating costs. The impact of stripping gas flow rate on triethylene. The aim of this thesis is to evaluate various models used for simulation of triethylene glycol teg dehydration plants by comparing simulation calculations to experimental and field data. A chemical engineering program, specifically for process engineering that is the least helpful or reliable piece of software ever written period. Benzene emissions calculations for teg units by glycalc and hysys griglycalc and aspentechs hysys are simulation tools frequently used to predict benzene emissions from glycol dehydration units.
The hysys simulation is conducted with the glycol package, which is created specifically to simulate gas dehydration, and pengrobinson. Dehydration units are often overdesigned, resulting in high capital or operating costs. Natural gas dehydration unit with teg tri ethylene glycol. It is usually produced saturated with water vapor under production conditions. An example of natural gas dehydration, using teg, was built with prosimplus. Unless otherwise specified, that convention is used in the rest of this page. Dehydration using triethylene glycol teg is widely used in natural gas processing to avoid corrosion and plugging of the flow lines. Aspen hysys is a comprehensive process modeling tool used by the worlds leading oil and gas producers, refineries, and engineering companies. Also, the design of the teg system was adequate to achieve a dew point of about 5oc at 95bars. Process simulation of triethylene glycol based dehydration.
Due to lack of available information from the gpp, it can be covered by accurate estimation of process integration software called hysys. Analyzing triethylene glycol teg gas dehydration system. Optimization using aspen hysys simulator and optimizer tool was performed to minimize the processing cost considering different sets of parameters. Five different teg flow rates were used for the simulation. Simulation of gas dehydration on an fpso using aspen hysys abstract natural gas is an important energy source among other sources of fossil fuels. In glycol dehydration, teg is usually referred to only as glycol. It is the most common and economical means of water removal from these streams. Water vapor in natural gas stream, poses threat to process. In the past years, glycol dehydration plants have been successfully designed using offtheshelf process simulators such. The process flow diagram of the gas dehydration and glycol recovery systems by aspen hysys. Watanasiri et al have developed and validated the cubic. A study by the natural gas star program epa reports approximately 36,000 glycol dehydration systems in the us natural gas production sector.
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