Simulation and optimization of natural gas processing plant. 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. Simulation of glycol processes for co2 dehydration linkoping. Lukoil is going to install the glycol dehydration unit on perm oil refinery plant. The impact of stripping gas flow rate on triethylene glycol. How it works the dehydration process is simplewet gas contacts dry glycol, and the glycol absorbs water from the gas. Enerflexs dehydration systems remove entrained water to avoid liquid drop out and bring your gas stream to your required specification.
Pdf modelling and simulation of glycol dehydration unit of a. Once filtered, this flow is used as cold fluid of the condenser e200 of the teg regeneration column. Im having this problem here with my teg regeneration which i hope to find some solutions. To study the impact of methanol meoh concentration and determine the traces in the teg dehydrated gas, the meoh content of the production stream feed to the. Teg system without flash tank separator sales pipeline pressure, typically between 250 and 800 psig. Hello everyone, i am currently working on a natural gas treating project for an upstream facility. In glycol dehydration, teg is usually referred to only as glycol. Charts and correlation for estimating methanol removal in. Learn how process ecology, a calgarybased oil and gas consultancy that assists gas processing plants in the operation of their facilities, used aspen hysys to model and provide operating strategies t. The gas entrained in the rich glycol, plus additional wet gas bypassing the contactor, expands through the.
In an earlier publication4, it was discussed how griglycalc and aspentechs hysys are simulation tools frequently used to specifically predict btex emissions from glycol dehydration units. 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. Troubleshooting a glycol dehydration system oil and gas. Optimize glycol circulation and install flash tank separators in glycol dehydrators contd exhibit 1. Improvement of teg regeneration in natural gas dehydration. The impact of stripping gas flow rate on triethylene glycol losses from glycol regeneration unit. Unlike glycol dehydration, which is an absorption process, dehydration with molecular sieves is an adsorption process. Commercial process simulation programs which have been used for glycol dehydration are aspen plus, aspen. Optimization of triethylene glycol dehydration of natural gas. Pdf simulation and optimization of the utilization of. 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. Aspen hysys and promax are commonly used process modelling and simulation software in gas dehydration 1618 as well as other gas. This work was limited due to financial constraint, difficulty arising from the software used hysys.
Gri glycalc has been the software of choice for regulatory agencies in north america with respect to. Charts and correlation for estimating methanol removal in teg gas dehydration process. The gas dehydration process is typically carried out using a large contactor tower, where glycol typically triethylene glycol teg, ethylene glycol meg or diethylene glycol deg enters countercurrently to the process gas for optimum contact between glycol and gas during mass transfer. Depending on the water content specification for the. The glycol, usually teg, enters at the top of the contactor and absorbs water as it progresses toward the bottom of the column.
Glycols typically seen in industry include triethylene glycol teg, diethylene glycol deg, ethylene glycol meg, and tetraethylene glycol treg. Process simulation an overview sciencedirect topics. Teg glycol dehydration hysys simulation, help posted in chemical process simulation. Jul 02, 2007 green berets ultralight bug out bag with gear recommendations duration. The simulation of the conventional teg dehydration unit can be performed by any simulation software such as hysys. Generally speaking, advanced simulation software like prosimplus enable. Shown here is a typical use of promax to estimate emissions from a glycol dehydration unit vent stream. Reboiler and condenser duty for water glycol separation column reflux ratio is another important factor which its effect on. Simulation and optimization of the utilization of triethylene. Estimating teg vaporization losses in teg dehydration unit. Natural gas dehydration unit with teg tri ethylene glycol. I am currently trying to model a teg dehydration unit in hysys. Reduce gas dehydration costs with highefficiency mixing.
A typical glycol dehydration process flow system is shown above. The griglycalc simulation model, developed by the gas research institute in the u. The heating allows boiling off the absorbed water vapor and the water dry lean glycol is cooled via heat exchange and pumped back to the absorber. I have collected some tutorial video for our learning purpose. The model is recommended for teg dehydration modeling as it provides. Pdf process simulation of glycol regeneration sohail. It is in this work demonstrated that it is possible to simulate both a traditional glycol dehydration process and more advanced co 2 dehydration processes using different equilibrium models in the process simulation program aspen hysys. Design and simulation of mono ethylene glycol recovery unit from effluent waste of morvarid. Finally, in the simulation of ng dehydration with zeolite a. During the course of this work the simulation software hysys v.
Molecular sieves are considered as one of the most important materials that are. Modeling the process rigorous process simulation is today widely used to design and optimize teg dehydration processes. 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. Enerflex has vast experience with dehydration systems including ethylene glycol and triethylene glycol dehydration, as well as physical adsorption via molecular sieve dehydration. With the addition of the cubicplusassociation cpa package in v10, aspen hysys can be used to model dehydration with teg, meg and deg. Gas treating simulation in protreat optimized gas treating. Glycol, the principal agent in this process, has a chemical affinity for water. But because the coldfinger technology is applied in the current unit, the specification is slightly different from a conventional dehydration process. Green berets ultralight bug out bag with gear recommendations duration. I do not own this song, all credit and rights goes to the band and the writers. I am having issues with converging the glycol regenerator. Process simulation is a modelbased representation of chemical, physical, biological, and other technical processes and unit operations in software 43. Although teg is recyclable, it is usually lost in the system due to vaporization and carryover, which results in economic issues.
Glycol dehydration is a liquid desiccant system for the removal of water from natural gas. Simulation of gas dehydration on an fpso using aspen hysys. In order to study the impact of the contactor temperature, stripping gas rate and teg circulation rate on the teg vaporization losses, the teg dehydration process was simulated using promax 1 software with its soaveredlichkwong srk 2 equation of state eos. This paper discusses the dehydration modeling technology available with aspen hysys in v10 and above. Simulation and optimization of the utilization of triethylene glycol in a natural gas dehydration process article pdf available in chemical product and process modeling 124 january 2017. In the simulation of ng dehydration with triethylene glycol teg, a dried gas was obtained with 41 ppmv of water, at the expense of 5. Optimize glycol circulation and install flash tank separators. It is based upon a rigorous and highfidelity mathematical process model to provide a realistic dynamic response of a process unit. This process is the traditional triethylene glycol teg based dehydration process and represent a unit with gas. Thus, of the four glycols, teg is the best suited for dehydration of natural gas. Glycol regeneration package posted in chemical process simulation. A study by the natural gas star program epa reports approximately 36,000 glycol dehydration systems in the us natural gas production. As a fullfledged process simulator, promax allows you to study how process changes affect emission rates and to estimate emissions from current operating profiles.
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. A case study package of the software was used in the analysis. It is the most common and economical means of water removal from these streams. Glycol dehydration is a liquid desiccant system for the removal of water from natural gas and natural gas liquids ngl. Simulation and optimization of the utilization of triethylene glycol in.
Perform detailed carbon capture studies, including the possible benefits of using amino acid salts. Investigating the performance of dehydration unit with. An example of natural gas dehydration, using teg, was built with prosimplus. One means of increasing this productivity is to use process simulation packages. Glycol regeneration package chemical process simulation. Glycol dehydration unit operation sample clip youtube. Please note that, in prosimplus, the first stage corresponds to the condenser and the last stage to the reboiler numbering from top to bottom. In addition to the effect on dehydration, high quantities of co 2 in the feed can accelerate corrosion in the regenerator. Carefully designed and arranged in chemical process model simulation results will be more accurate and reliable. A study by the natural gas star program epa reports approximately 36,000 glycol dehydration systems in the us natural gas production sector.
Aspen hysys has historically employed the glycol property package for teg. The impact of stripping gas flow rate on triethylene glycol losses. Three different simulation tools are included in the evaluation. Simulation software such as griglycalc or hysys aspen technology is used to evaluate benzene emissions from glycol dehydrators. Modeling and simulation of natural gas dehydration reactor. Process simulation of dimethyl ether synthesis via methanol vapor phase dehydration ziyang bai, hongfang ma, haitao zhang, weiyong ying, dingye fang east china university of science and technology, engineering research center of large scale reactor engineering and. Simulation, optimization, and sensitivity analysis of a. The first is a rearrangement with a hydride shift occurring in concert with the loss of a water molecule. The objective of this experiment is to carry out a simulation on teg dehydration unit using aspenhysys process software. Because protreat is a rigorous ratebased simulator, it offers the ultimate in accuracy, reliability, and truly predictive power. The process of dehydration by using teg is absorption, involves the use of a liquid desiccant to remove water content from the gas. 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. Dehydration by using triethylene glycol teg there are numbers of liquids that can be used to absorb water from natural gases such as calcium chloride, lithium chloride and glycols.
Molecular sieves are usually used when very dry gas is required such as a cryogenic process. Optimization of natural gas dehydration using triethylene. The four major methods of dehydration are absorption, adsorption, gas permeation and refrigeration. Gses envision simulation is a realtime dynamic process simulation program used for operator training. Benzene emissions in glycol dehydrators process ecology. 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. A realtime dynamic simulation of glycol dehydration unit. Glycols typically seen in industry include triethylene glycol teg, diethylene glycol deg, ethylene glycol meg, and tetraethylene glycol. The objective of this experiment is to carry out a simulation on teg dehydration unit using aspenhysys process. To perform a good troubleshoot on glycol dehydration equipment, you must know what the system is designed for and how the current conditions compare to that design. The protreat simulator is the industrys most advanced simulation tool for gas treating. Hence this paper looks for proffer solution options for optimizing and maintaining the natural gas dehydration plant by using hysys simulator software. Double clicking on the profile will generate the corresponding graph.
A novel method of dehydration unit simulation is presented in this study. The impact of stripping gas flow rate on triethylene. Dry glycol flows down the tower from the top, from tray to tray or through packing material. Water in the gas adheres to the solid phase, the solid being the mole sieve and thus is removed from the natural gas.
Pdf the dehydration unit of a plant that processes natural gas uses triethylene glycol. Simulate the physical solvent dmpeg dimethyl ether of polyethylene glycol, glycol dehydration, and sour water stripping as masstransfer ratecontrolled processes. Improvement of teg regeneration in natural gas dehydration using a hydrocarbon solvent. Modelling and simulation of glycol dehydration unit of a natural gas plant.
Two possible mechanisms have been proposed to account for the rearrangement of ethylene glycol to acetaldehyde. The second is an acid catalyzed dehydration reaction proceeding through the enol to yield acetaldehyde. 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. I have sucessfully done it in promax before, but first time in hysys. Design and simulation of mono ethylene glycol recovery. Composition profiles can be accessed after the simulation in each column configuration window, in the profiles tab. Promax is considered the industry standard for designing amine gas treating and glycol dehydration units. Simulation study ibrahim tk1, abdulrahman rk 2, khalaf fh1 and kamal im3 1petroleum engineering department, faculty of engineering, knowledge university, kurdistan, iraq. Therefore, it is a good model to adopt for modeling glycol dehydration processes. S, now called the gas technology institute has received significant scrutiny throughout the united states.
Process simulation of dimethyl ether synthesis via. V10, aspen hysys can be used to model dehydration with teg, meg and deg. Simulation of typical natural gas dehydration unit using. Tetraethylene glycol would have to be regenerated at higher temperatures than teg to reach the required purity for application in a glycol dehydration unit. Glycol dehydration an overview sciencedirect topics. Methodology the design and simulation of the natural gas dehydration plant utilized in this work to achieve the desired objectives. Triethylene glycol teg is the most common glycol used in these absorption systems.
This article presents a generalized methodology of a natural gas process plant simulation and optimization taking a typical gas process plant in bangladesh as an example. Optimization of natural gas dehydration using triethylene glycol was carried out using aspen hysys process software and regression analysis. Modelling of natural gas sweetening and dehydration prior. The most popular process simulator software used for dehydration of natural gas is. In the past years, glycol dehydration plants have been successfully designed using offtheshelf process simulators such. In todays competitive economy, engineer must become as productive as possible. Teg glycol dehydration hysys simulation, help chemical. Process simulation of triethylene glycol based dehydration. The process simulation programs proii and promax also have models available recommended for the. Initially released in late 2005, promax is a continuance of two previous process simulators, prosim and tsweet. Ethylene glycol to acetaldehydedehydration or a concerted. In the past years, glycol dehydration plants have been successfully designed using offtheshelf process simulators such as aspen hysys, promax and other similar tools. Glycol dehydration units are typically represented by a contactor, a flash tank, heat exchangers, and a regenerator, as shown in figure 1. On the other hand, the co 2 can act as a stripping vapor in the regenerator.
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