Natural gas dehydration by molecular sieve in offshore plants: Impact of increasing carbon dioxide content

Santos, Myrlla G.R.S.; Correia, Leilane M.S.; Medeiros, José Luiz de; Araújo, Ofélia de Queiroz Fernandes

doi:10.1016/j.enconman.2017.03.005

Cited by 78 publications

(29 citation statements)

References 25 publications

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“…Although several other options exist for natural gas dehydration (e.g. membrane separation [2][3][4] , molecular sieves [5][6][7] , absorption into ionic liquids 8 , supersonic nozzles 9 and isenthalpic gas cooling 10,11 ), glycol absorption is by far the most used method for industrial applications. 12 Meanwhile recent technical advances have seen an increase in subsea processing installations, which present several advantages over onshore processing.…”

Section: Introductionmentioning

confidence: 99%

Multicomponent Vapor–Liquid Equilibrium Measurement and Modeling of Ethylene Glycol, Water, and Natural Gas Mixtures at 6 and 12.5 MPa

et al. 2018

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Section: Introductionmentioning

confidence: 99%

Multicomponent Vapor–Liquid Equilibrium Measurement and Modeling of Ethylene Glycol, Water, and Natural Gas Mixtures at 6 and 12.5 MPa

et al. 2018

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“…Our principal purpose in this study is the practical application of the ejector of pressurizing gas in engineering. The molecular sieve dehydration technology is one of the natural gas dehydration methods, which is often used for deep dehydration of natural gas 7 . Figure 1a shows a common molecular sieve dehydration process.…”

Section: Introductionmentioning

confidence: 99%

“…The molecular sieve dehydration technology is one of the natural gas dehydration methods, which is often used for deep dehydration of natural gas. 7 Figure 1a shows a common molecular sieve dehydration process. In order to avoid waste of regeneration gas, natural gas purification plants conventionally adopt compressor to pressurize and recycle the regeneration gas.…”

Section: Introductionmentioning

confidence: 99%

Design and numerical investigation of ejector for gas pressurization

Wang

Li³

et al. 2021

Asia-Pacific J Chem Eng

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Compared with the compressor, the ejector is a novel cost‐effective device to pressurize gas. Taking the regeneration natural gas pressurization process in the molecular sieve dehydration system as an example, it is first proposed to replace the compressor with an ejector to accomplish the pressurized recovery of low‐pressure regeneration natural gas. The numerical simulation method has been validated, and its results agree well with published experimental results. The simulation results indicate that the ejector designed with one‐dimensional theory can achieve the low‐pressure gas pressurization. Besides, the influence of operating parameters and structural parameters on the ejector performance is also investigated. As the discharged pressure increases, the entrainment ratio gradually decreases, but the pressure ratio rises linearly. With the increase of the induced flow pressure, the ejector pressurization range reduces. Under different discharged pressure, the entrainment ratio presents three different trends when the primary flow pressure enhances. Also, a larger nozzle exit diameter will cause the shock wave phenomenon, which is not conducive to the ejector performance, so there is an optimal nozzle exit diameter for the ejector. The length of the constant‐area mixing chamber has seldom effect on the pressure ratio. The optimal value of the NXP for entrainment ratio is equal to (0.5–1.0)d2. In conclusion, the research provides a new gas pressurization approach and a much better understanding of the gas flow and mixing process within the ejector.

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“…In recent years, very few published articles research on the global optimization of operating conditions to reduce TCEC for the whole high-sulfur gas purification plant. Most optimization studies focus on the subsections, such as GSU (Jassim 2016;Peter et al 2011;Qiu et al 2014;Behroozsarand and Zamaniyan 2011;Al-Lagtah et al 2015), DU (Santos et al 2017;Rouzbahani et al 2014), SRU (Manenti et al 2014;Zarei et al 2016;Adewale et al 2016) and TGTU (Wahedi et al 2015). A typical Iranian gas sweetening plant was simulated by HYSYS v3.1 and optimized by NSGA-II method (Behroozsarand and Zamaniyan 2011).…”

Section: Introductionmentioning

confidence: 99%

Multi-objective optimization of high-sulfur natural gas purification plant

Shang

Qiu

et al. 2019

Pet. Sci.

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There exists large space to save energy of high-sulfur natural gas purification process. The multi-objective optimization problem has been investigated to effectively reduce the total comprehensive energy consumption and further improve the production rate of purified gas. A steady-state simulation model of high-sulfur natural gas purification process has been set up by using ProMax. Seven key operating parameters of the purification process have been determined based on the analysis of comprehensive energy consumption distribution. To solve the problem that the process model does not converge in some conditions, back-propagation (BP) neural network has been applied to substitute the simulation model to predict the relative parameters in the optimization model. The uniform design method and the table U 21 (10 7) have been applied to design the experiment points for training and testing BP model. High prediction accuracy can be achieved by using the BP model. Nondominated sorting genetic algorithm-II has been developed to optimize the two objectives, and 100 Pareto optimal solutions have been obtained. Three optimal points have been selected and evaluated further. The results demonstrate that the total comprehensive energy consumption is reduced by 13.4% and the production rate of purified gas is improved by 0.2% under the optimized operating conditions.

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Natural gas dehydration by molecular sieve in offshore plants: Impact of increasing carbon dioxide content

Cited by 78 publications

References 25 publications

Multicomponent Vapor–Liquid Equilibrium Measurement and Modeling of Ethylene Glycol, Water, and Natural Gas Mixtures at 6 and 12.5 MPa

Multicomponent Vapor–Liquid Equilibrium Measurement and Modeling of Ethylene Glycol, Water, and Natural Gas Mixtures at 6 and 12.5 MPa

Design and numerical investigation of ejector for gas pressurization

Multi-objective optimization of high-sulfur natural gas purification plant

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