Industrial Operation of HySWEET®, a New Hybrid Solvent for Improved Mercaptan Removal

Cadours, Renaud; Shah, Virenkumar; Weiß, Claire; Roquet, Damien; Lallemand, François

doi:10.1016/s1876-0147(10)02024-0

Cited by 7 publications

(7 citation statements)

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“…As presented in previous papers [4,5], the capability of the solvent to reach the low mercaptan concentrations was verified in a real absorber column of pilot plant, where besides equilibrium, reaction kinetics, physical properties of the solvent such as viscosity; mass transfer and contactor efficiency also play an important role. Experiments showed that, for high levels of C1SH in the raw gas (up to 1270 ppmv) and low acid gas content, it was possible to reach a mercaptan specification between 4 and 14 ppmv ( Figure 4).…”

Section: Development Of Hysweet ® Processmentioning

confidence: 72%

“…This energy gain was confirmed during an industrial test of HySWEET ® process in T9 unit of the Lacq, and during routine industrial operation of T12 unit of the Lacq plant. After this successful industrial demonstration, it was decided to implement the HySWEET ® process to the T12 unit of the Lacq plant in 2008 [4]. In contrast to the test on T9 unit, that was an R&D test at industrial scale, the HySWEET ® process implementation in T12 unit is a routine industrial operation.…”

Section: Comparison Between the Hysweet ® -Dea And Water-dea Solventmentioning

confidence: 99%

“…Total, taking advantage of its extensive know-how and experience in acid gas removal with amine system [1], improves its solvent technology by developing a new competitive hybrid solvent allowing the simultaneous removal of CO2, H2S, and mercaptans, while preserving low hydrocarbons co-absorption. This paper briefly reminds the key points of the process development already presented in previous papers [2,3,4]: selection and physico-chemical characterization of the solvent at the laboratory scale, with a particular attention given to operation related constraints as corrosion, foaming, degradation; validation of the process performances on a pilot plant. The techno-economic study presented previously [5] enabled to identify the typical application cases for which the new hybrid solvent alone will allow to reach specifications required for mercaptans, and reduction of the downstream mercaptan removal units for the other cases.…”

Section: Introductionmentioning

confidence: 99%

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HySWEET® Process: An Improvement in Energy Efficiency

et al. 2010

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Removing mercaptans from sour natural gas has always been considered as a challenge. This is becoming an even more important issue with the global trend towards more stringent commercial gas specifications. Amines have been extensively used because of their ability to meet the most severe H 2 S and CO 2 specifications and their very high acid gas selectivity over hydrocarbons, but present very limited mercaptans removal performances. An additional treatment step is required to achieve the total sulfur specification in the exported gas. Hybrid solvents are more efficient in removing mercaptans, but may have the disadvantage of poor acid gas selectivity over hydrocarbons, resulting in hydrocarbon losses with the separated acid gas.Total, taking advantage of its extensive know-how and experience in gas sweetening with amine mixtures, has developed a new hybrid solvent formulation allowing simultaneous absorption of acid gases and of mercaptans, with limited co-absorption of hydrocarbons. The HySWEET ® process using the new hybrid solvent is in operation at the Lacq plant in France since 2008. More than half of the gas production is now treated with this new hybrid solvent, allowing to achieve not only higher global mercaptan removal but also to reduce the overall energy consumption compared to the use of the HiLoadDEA process. This paper emphasis on the energy gain that can be achieved by using the HySWEET ® process compared to the conventional HiLoadDEA process. A pilot plant study was carried out to compare the regeneration heat duty requirement of the new HySWEET ® process with that of the HiLoadDEA process. This study has actually demonstrated that under similar conditions the HySWEET ® solvent requires up to 15 % lower reboiler heat duty compared to the conventional amine solvent. These results have been confirmed during industrial operation of the HySWEET ® process at the Lacq plant. This paper also reminds the results of the techno-economic study carried out to evaluate the potential gain achievable by the implementation of the new hybrid solvent. The study lead to identify the application cases for which the new hybrid solvent will allow an economic and complete mercaptan removal without any additional treatment, and a perspective of reduction of the additional treatments for the other cases.

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Section: Development Of Hysweet ® Processmentioning

confidence: 72%

Section: Comparison Between the Hysweet ® -Dea And Water-dea Solventmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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HySWEET® Process: An Improvement in Energy Efficiency

et al. 2010

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“…The choice of the solvents was motivated by their wide application in industrial processes and the absence of consistent data at 298.15 K for them in the literature. TDG is employed in a commercial mixed chemical/physical solvent formulation for sour gas treating (HySWEET technology) developed by TotalEnergies S.E . HMPA and DMI are being used as solvents for gases and polymers and in organic synthesis.…”

Section: Resultsmentioning

confidence: 99%

Chemoinformatics-Driven Design of New Physical Solvents for Selective CO₂ Absorption

Orlov

Demenko

Bignaud

et al. 2021

Environ. Sci. Technol.

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The removal of CO 2 from gases is an important industrial process in the transition to a lowcarbon economy. The use of selective physical (co-)solvents is especially perspective in cases when the amount of CO 2 is large as it enables one to lower the energy requirements for solvent regeneration. However, only a few physical solvents have found industrial application and the design of new ones can pave the way to more efficient gas treatment techniques. Experimental screening of gas solubility is a labor-intensive process, and solubility modeling is a viable strategy to reduce the number of solvents subject to experimental measurements. In this paper, a chemoinformatics-based modeling workflow was applied to build a predictive model for the solubility of CO 2 and four other industrially important gases (CO, CH 4 , H 2 , N 2 ). A dataset containing solubilities of gases in 280 solvents was collected from literature sources and supplemented with the new data for six solvents measured in the present study. A modeling workflow based on the usage of several state-of-the-art machine learning algorithms was applied to establish quantitative structure-solubility relationships. The best models were used to perform virtual screening of the industrially produced chemicals. It enabled the identification of compounds with high predicted CO 2 solubility and selectivity towards the other gases. The prediction for one of the compounds − 4-Methylmorpholine was confirmed experimentally. SYNOPSIS STATEMENTDeveloping better solvents for selective CO 2 capture is crucial for reaching net-zero emissions targets.4

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“…Meanwhile, the steam used to regenerate the solvent was reduced by nearly 15% [5] , [8] . At the optimum composition of new solvent, the removal rate of Methyl Mercaptan got a stunning 35% up (compared to original absorption rate).…”

Section: Industrial Test Runs and Operationmentioning

confidence: 99%

Hysweet® Technology: A Major Progress in Sour Gas Processing

Zhao

Weiß

Cadours³

et al. 2012

All Days

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Removing mercaptans from sour natural gas is becoming an important issue with the global trend towards more stringent specifications for commercial gases. Amines have been extensively used on account of their ability to meet severe H 2 S and CO 2 specifications and very high acid gas selectivity over hydrocarbons. Amines however present very limited mercaptans removal capabilities, an additional treatment step is generally required to achieve a stringent specification of total sulfur specification in the sales gas or upstream liquefaction plant.Total, taking advantage of its extensive know-how and experiences in acid gas removal, has developed the HySWEET ® processes, for simultaneous absorption of acid gases and mercaptans. This technology relies on a new hybrid solvent formulation allowing limited coabsorption of hydrocarbons and improved energy efficiency. The HySWEET ® process has been in operation since 2008, and the entire gas production of the Lacq plant, France is now treated with this new hybrid solvent. The industrial feedback has confirmed not only higher mercaptan removal, but also lower energy consumption when compared to the AdvAmine™ HiLoadDEA process which has allowed for Lacq gas treatment during most of the lifetime of the field.The development of the HySWEET ® DEA process is now completed and ready for commercialization. An optimized design can now be proposed for any application case targeting total CO 2 and H 2 S removal along with a stringent total sulfur specification. Thousands of laboratory measurements (i.e. thermodynamics, kinetics, physical properties) have been used to develop a rigorous simulation tool which relies on rate-based transfer models validated against extensive pilot and operational test-runs.The HySWEET ® MDEA process is under development, for the selective elimination of sulfur compounds over CO 2 . Improved mercaptan removal and high energy efficiency have been demonstrated during pilot tests. These pilot test results will be later used to validate the prediction of the simulation tool currently under development.

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Industrial Operation of HySWEET®, a New Hybrid Solvent for Improved Mercaptan Removal

Cited by 7 publications

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HySWEET® Process: An Improvement in Energy Efficiency

HySWEET® Process: An Improvement in Energy Efficiency

Chemoinformatics-Driven Design of New Physical Solvents for Selective CO₂ Absorption

Hysweet® Technology: A Major Progress in Sour Gas Processing

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Industrial Operation of HySWEET®, a New Hybrid Solvent for Improved Mercaptan Removal

Cited by 7 publications

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HySWEET® Process: An Improvement in Energy Efficiency

HySWEET® Process: An Improvement in Energy Efficiency

Chemoinformatics-Driven Design of New Physical Solvents for Selective CO2 Absorption

Hysweet® Technology: A Major Progress in Sour Gas Processing

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Chemoinformatics-Driven Design of New Physical Solvents for Selective CO₂ Absorption