Effective strategies to reduce triethylene glycol consumption in natural gas processing plants

Trueba, Luis; Gaston, Tyler E.; Brackin, James; Miller, Joseph M.; You, Byoung-Hee

doi:10.1016/j.cscee.2022.100196

Cited by 9 publications

(6 citation statements)

References 7 publications

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“…Common dehydrating agents include concentrated sulfuric acid, diethylene glycol, triethylene glycol (TEG), etc. − Concentrated sulfuric acid is highly corrosive, and the waste sulfuric acid is difficult to recover, which causes significant pollution . However, due to its high vapor pressure, diethylene glycol has a significant solvent loss. , TEG is easily oxidized to produce corrosive organic acids after contact with air, which will cause specific corrosion to the equipment . In addition, the TEG regeneration column’s bottom reboiler must strictly control the temperature.…”

Section: Gases Dehydrationmentioning

confidence: 99%

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Condensable Gases Capture with Ionic Liquids

Chen

Lei

et al. 2023

Chem. Rev.

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Condensable gases are the sum of condensable and volatile steam or organic compounds, including water vapor, which are discharged into the atmosphere in gaseous form at atmospheric pressure and room temperature. Condensable toxic and harmful gases emitted from petrochemical, chemical, packaging and printing, industrial coatings, and mineral mining activities seriously pollute the atmospheric environment and endanger human health. Meanwhile, these gases are necessary chemical raw materials; therefore, developing green and efficient capture technology is significant for efficiently utilizing condensed gas resources. To overcome the problems of pollution and corrosion existing in traditional organic solvent and alkali absorption methods, ionic liquids (ILs), known as “liquid molecular sieves”, have received unprecedented attention thanks to their excellent separation and regeneration performance and have gradually become green solvents used by scholars to replace traditional absorbents. This work reviews the research progress of ILs in separating condensate gas. As the basis of chemical engineering, this review first provides a detailed discussion of the origin of predictive molecular thermodynamics and its broad application in theory and industry. Afterward, this review focuses on the latest research results of ILs in the capture of several important typical condensable gases, including water vapor, aromatic VOCs (i.e., BTEX), chlorinated VOC, fluorinated refrigerant gas, low-carbon alcohols, ketones, ethers, ester vapors, etc. Using pure IL, mixed ILs, and IL + organic solvent mixtures as absorbents also briefly expanded the related reports of porous materials loaded with an IL as adsorbents. Finally, future development and research directions in this exciting field are remarked.

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Section: Gases Dehydrationmentioning

confidence: 99%

“…179,180 TEG is easily oxidized to produce corrosive organic acids after contact with air, which will cause specific corrosion to the equipment. 181 In addition, the TEG regeneration column's bottom reboiler must strictly control the temperature.…”

Section: Challengesmentioning

confidence: 99%

Condensable Gases Capture with Ionic Liquids

Chen

Lei

et al. 2023

Chem. Rev.

View full text Add to dashboard Cite

show abstract

“…91,92 This reaction is favored underr neutral or basic conditions since it is initiated by ozone and hydroxide ions, while the pH of fresh TEG is approximately 7. 38…”

Section: Iodometry and Peroxide Accumulationmentioning

confidence: 99%

“…[35][36][37] While autoxidation was associated with numerous compounds, such chemical processes on glycols did not gather enough attention in the past. Additionally, the oxidation of TEG is one of the major concerns in the natural gas dehydration industry, 38 leading to signicantly reduced productivity. The aliphatic nature of glycols, i.e., a lack of unsaturated bonds, makes them relatively less reactive to oxidative electrophiles (radicals, O 3 ), which are usually the initiators of autoxidation.…”

Section: Introductionmentioning

confidence: 99%