Sensitivity analysis and process optimization of a natural gas dehydration unit using triethylene glycol

Petropoulou, Eirini; Carollo, Cristina; Pappa, Georgia D.; Caputo, Giuseppe; Voutsas, Epaminondas

doi:10.1016/j.jngse.2019.102982

Cited by 14 publications

(9 citation statements)

References 22 publications

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“…From the comparison of the traditional process and the new method through Figures and , it can be seen that in terms of the absorber and regenerator, the two approaches are essentially consistent. The sensitive analyses in the aspects of feed gas pressure, temperature, and number of column trays for the traditional TEG dehydration process have been reported in many literature studies; ,,, thus, they are not included in our work. The numbers of trays for the absorber and regenerator are 5 and 3, respectively, as these values are found to be most feasible for the gas dehydration process …”

Section: Methodology and Key Parameter Settingsmentioning

confidence: 99%

Technical, Economical, and Environmental Performance Assessment of an Improved Triethylene Glycol Dehydration Process for Shale Gas

Liu

Zhu

Hong³

et al. 2022

ACS Omega

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We proposed an optimized triethylene glycol (TEG) dehydration approach in this work, with the aim of overcoming the drawbacks of traditional TEG dehydration method for shale gas processing and providing a more efficient, simplified, energy-saving, economical, and environmentally friendly technology dedicated for shale gas exploration. The proposed improved TEG dehydration method has less equipment and is convenient for modularization, which is of great significance and convenience to applications in the shale gas dehydration station. Additionally, it has some remarkable improvements on process optimization as well as the rational utilization of utilities. To evaluate the performance of this improved method, thermodynamics and economy were assessed in this study. The results proved that the new proposed method was an applicable and efficient technology. Moreover, in comparison to the conventional TEG dehydration method, the new method is more energy saving and economical. The energy-saving amount is especially high with a large feed capacity, and it reaches up to about 3000 MJ/h when the feed gas flowrate is 210 MMscfd. The capital cost (CapEx) and operation cost (OpEx) of the new proposed dehydration method are significantly lower, which represent only 56.9 and 47.8% those of the conventional method, respectively. Besides, sensitive analysis of the key parameters influencing system performance was performed to explore the energy-saving potential and to maximize the economic benefit. Additionally, an environmental assessment through a field-emission test was conducted, and the results showed that the new method exhibited superior environmental performance.

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Section: Methodology and Key Parameter Settingsmentioning

confidence: 99%

Technical, Economical, and Environmental Performance Assessment of an Improved Triethylene Glycol Dehydration Process for Shale Gas

Liu

Zhu

Hong³

et al. 2022

ACS Omega

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“…C oper;red represents the reduction in operating costs, and the calculation method is shown in Table 5, [25,26] C oper is the annual operating cost and rate is the electricity demand. [27] Table 3. Composition and physical parameters of wet natural gas.…”

Section: Operating Costsmentioning

confidence: 99%

“…

C_{\text{oper,red}}

represents the reduction in operating costs, and the calculation method is shown in Table 5 , [ 25,26 ]

C_{\text{oper}}

is the annual operating cost and rate is the electricity demand. [ 27 ]…”

Section: Economic Evaluationmentioning

confidence: 99%

Selection of Natural Gas Dehydration Process for Offshore Floating Production Storage and Offloading

Zhu,

Wang,

Cao

et al. 2024

Energy Tech

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Based on the oil and gas component data of an offshore gas field in West Africa, the steady‐state models of the triethylene glycol (TEG) dehydration process and the low‐temperature separation dehydration process are established. The adaptability of two kinds of processes to the disturbance of pressure, temperature, and flow of imported natural gas source is studied, and the sensitivity analysis is carried out. In addition, the investment cost and operating cost of the two types of processes are compared. The low temperature separation dehydration process is more adaptable to the disturbance of inlet gas source than the TEG dehydration process. The former is more expensive to build than the latter, but less expensive to run. The low temperature separation dehydration is preferred as the natural gas dehydration process which is more suitable for floating production storage and offloading.

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“…Among them, the common method of NG dehydration is using triethylene glycol (TEG) as dehydrating agent. 12 TEG has a strong hygroscopicity, and its dehydration performance is particularly outstanding. TEG can remove water from NG to the concentration specified in the pipeline to avoid hydrate formation.…”

Section: Introductionmentioning

confidence: 99%

“…Currently, there are many NG dehydration processes, mainly including solvent absorption method, 5 solid absorption method, 6,7 membrane separation technology, 8–10 supersonic dehydration method, 11 and so on. Among them, the common method of NG dehydration is using triethylene glycol (TEG) as dehydrating agent 12 . TEG has a strong hygroscopicity, and its dehydration performance is particularly outstanding.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic and molecular insights into natural gas dehydration using choline chloride‐based deep eutectic solvents

Liu

Gui

et al. 2022

AIChE Journal

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Deep eutectic solvents (DESs) as promising green drying agents were first proposed to natural gas (NG) dehydration. In this work, choline chloride (ChCl)-based DESs were prepared using ChCl as hydrogen bond acceptor (HBA) and triethylene glycol (TEG), ethylene glycol (EG) or Urea as hydrogen bond donors (HBDs). To explore the potential application, methane (CH 4 ) dehydration experiment was conducted to verify the dehydration performance using prepared DESs. The thermodynamic properties were predicted by COSMO-RS model (Conductor-like screening model for real solvents). The quantum chemistry calculation was applied to understand the separation mechanism at the molecular level. The absorption performance of H 2 O in DESs depends on the weak interaction between Cl atom (or N and O atom) of ChCl and H atom of H 2 O as well as the free volume of DESs. Molecular dynamics (MD) simulation discloses the intermolecular interaction between HBA and HBD.This work makes the first multi-scale analysis on NG dehydration using DESs.

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Sensitivity analysis and process optimization of a natural gas dehydration unit using triethylene glycol

Cited by 14 publications

References 22 publications

Technical, Economical, and Environmental Performance Assessment of an Improved Triethylene Glycol Dehydration Process for Shale Gas

Technical, Economical, and Environmental Performance Assessment of an Improved Triethylene Glycol Dehydration Process for Shale Gas

Selection of Natural Gas Dehydration Process for Offshore Floating Production Storage and Offloading

Thermodynamic and molecular insights into natural gas dehydration using choline chloride‐based deep eutectic solvents

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