Optimization and performance improvement of Lekhwair natural gas sweetening plant using Aspen HYSYS

Al-Lagtah, Nasir; Al-Habsi, Sultan; Onaizi, Sagheer A.

doi:10.1016/j.jngse.2015.06.030

Cited by 73 publications

(24 citation statements)

References 14 publications

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“…In split flow configuration, the needed air to burn the entire acid gas stream burns a portion of feed stream and thereupon the furnace outlet stream temperature is increased. Using the bypass fraction makes the process equal to the process that uses enriched oxygen or pure oxygen . This trend is continued as long as the amount of bypass fraction is excessively high, and then the reaction furnace outlet stream temperature is decreased with further separation.…”

Section: Resultsmentioning

confidence: 99%

Simulation, equipment performance evaluation and sensitivity analysis as a comprehensive parametric study of sulfur recovery unit

Hashemi

Pourfayaz

Mehrpooya

2020

Asia-Pacific J Chem Eng

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The sulfur recovery unit based on modified Claus process with split flow was simulated, so that the validation results showed satisfactory agreement with the refinery data. In this study, comprehensive investigation was carried out on various parameters of the unit. Concentration changes of compounds were investigated as the process stream passes along various equipment. Composite curves were generated, and the minimum approach temperature was calculated as one of the operational parameters of heat exchangers. Fluid condensation probability was investigated in catalytic reactors. The recovery of sulfur and the amount of sulfur production were calculated by process streams passing along catalytic reactors and condensers respectively. The most influential performance parameters including the fuel flow rate, combustion air flow rate, and bypasses fraction were considered as sensitivity analysis parameters, and their variation influences were investigated on the recovery of sulfur, the ratio of hydrogen sulfide to sulfur dioxide, the amount of produced steam, and the furnace outlet stream temperature. The optimal amounts for fuel flow rate and inlet air flow rate were calculated with the values of 0 and 202 mol/s, respectively, and according to the results, 15% of the mainstream flow rate gives the optimum amount of bypass fraction.

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Section: Resultsmentioning

confidence: 99%

Simulation, equipment performance evaluation and sensitivity analysis as a comprehensive parametric study of sulfur recovery unit

Hashemi

Pourfayaz

Mehrpooya

2020

Asia-Pacific J Chem Eng

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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%

“…Three objectives were minimizing of plant energy consumption, amine circulation rate and maximization of carbon dioxide recovery, respectively. Lekhwair natural gas sweetening plant was simulated by HYSYS v7.3 (Al-Lagtah et al 2015). The main operating parameters, lean amine circulation rate, temperature and concentration, were optimized based on sensitivity analysis and keeping the device at its best operating range.…”

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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“…Therefore, if these gas storages were operated without treatments, it would put reservoir engineers as well as the environment at rick. Thus, amine gas sweetening process is the widely used method for acid gas removal (Al-Lagtah et al, 2015). Thus, amine gas sweetening process is the widely used method for acid gas removal (Al-Lagtah et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…Thus, urgent solutions are needed to deal with high content of H 2 S. H 2 S removal is the most common way to deal with the acid gas reservoirs (Zhang and Wood, 2015). Additionally, some absorption methods were proposed for H 2 S removal (Abdulrahman and Sebastine, 2013;Adib et al, 2013;Al-Lagtah et al, 2015;Banat et al, 2014). This is also the reason why more than 50% acid gas removal technologies apply the aqueous solutions of alkanolamines.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Injection and Production Parameters for Sour Gas Storages: A Case Study

Chen

Zhao

et al. 2016

Day 2 Wed, March 23, 2016

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To meet with the energy strategy, some natural gas reservoirs in Ordos Basin are planned to use as gas storages. However, most of the gas reservoirs have high content of H 2 S. If they were operated without parameters optimization, it would put reservoir engineers as well as the environment at rick. Thus, optimization of injection and production parameters of these sour gas storages is urgently needed.In the paper, using numerical method, the movement mechanism of H 2 S is studied. With the sensitivity analysis, the effects of some critical factors on H 2 S mole fraction in produced gas are investigated including ultimate recovery factor, injection rate, production rate, and injection-production rate ratio. Based on the results of the sensitivity analysis, optimal injection-production parameters are selected for a gas storage S24 in Ordos Basin.The results show that the H 2 S mole fraction in produced gas decreases as the injection-production cycle number increases. When the cycle number reaches 5, the H 2 S mole fraction is relatively stable. Additionally, the H 2 S mole fraction in produced gas hinges heavily on ultimate recovery factor, injection rate, production rate, and the injection-production rate ratio. The decrease amplitude of H 2 S mole fraction increases as ultimate recovery factor, injection rate, and injection-production rate ratio increase; it decreases as the production rate increases. Numerical results show that after 4 cycles of the operation with the optimal parameters, the produced natural gas from S24 gas storage can reach the quality standard II of commercial natural gas, which is safe for humans and environment.This study provides us with key technical references for operation of the sour gas storages to ease the contradiction between energy supply and demand. 2OTC-26686-MS

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Optimization and performance improvement of Lekhwair natural gas sweetening plant using Aspen HYSYS

Cited by 73 publications

References 14 publications

Simulation, equipment performance evaluation and sensitivity analysis as a comprehensive parametric study of sulfur recovery unit

Simulation, equipment performance evaluation and sensitivity analysis as a comprehensive parametric study of sulfur recovery unit

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

Optimization of Injection and Production Parameters for Sour Gas Storages: A Case Study

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