Evaluation of the absorption performance of new compound absorbents for toluene under extremely high load

Zhu, Zhongyang; Yu, Mengqi; Wu, Zhenjun; Yan, Yuxi; Li, Shunyi

doi:10.1007/s11356-021-14281-y

Cited by 9 publications

(3 citation statements)

References 32 publications

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“…The decrease of viscosity will also give rise to the improvement of saturated absorption amount and the shortening of the time required to reach equilibrium. 224,225 The time required to reach equilibrium is determined by both absorption rate and saturated absorption amount, which indicates that the effect of the temperature rise on absorption rate is greater than that on absorption capacity. According to the absorption capacity of ILs (i.e., IL saturated water absorption), the hydrophilicity of ILs is divided into four grades (i.e., ultrahigh, high, medium, and low).…”

Section: Dehydration Kineticsmentioning

confidence: 99%

“…Toward ILs, the increase in temperature will increase the gas kinetic energy and reduce the ILs’ viscosity. , The promotion effect of the decrease of viscosity on absorption is greater than the inhibition effect of the increase of molecular kinetic energy on absorption, so that the absorption rate is accelerated. The decrease of viscosity will also give rise to the improvement of saturated absorption amount and the shortening of the time required to reach equilibrium. , The time required to reach equilibrium is determined by both absorption rate and saturated absorption amount, which indicates that the effect of the temperature rise on absorption rate is greater than that on absorption capacity. According to the absorption capacity of ILs (i.e., IL saturated water absorption), the hydrophilicity of ILs is divided into four grades (i.e., ultrahigh, high, medium, and low).…”

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: Dehydration Kineticsmentioning

confidence: 99%

Section: Gases Dehydrationmentioning

confidence: 99%

Condensable Gases Capture with Ionic Liquids

Chen

Lei

et al. 2023

Chem. Rev.

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“…The following factors should be considered in the selection of absorbents: (1) vapor pressure affecting volatility loss and energy consumption in recovery stage; (2) viscosity affecting removal ratio; (3) thermodynamic stability and oxidation resistance affecting the service life of solvents; (4) corrosion and price . Mineral oil, vegetal oil, and high boiling organic solvents are common VOCs absorbents, especially in the capture of benzene series and chlorinated VOCs. − However, the recovery process of mineral oil such as light diesel oil is complex and easy to cause secondary pollution. For traditional high boiling organic solvents, volatile loss is inevitable, which will increase the solvent procurement cost.…”

Section: Introductionmentioning

confidence: 99%

Ionic Liquids for Capturing 1,2-Dimethoxyethane (DMET) in VOCs: Experiment and Mechanism Exploration

Gui

Zhu

et al. 2022

Ind. Eng. Chem. Res.

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Ionic liquids (ILs) as green solvents were first used to capture 1,2-dimethoxyethane (DMET) from exhaust gas. The vapor liquid equilibrium (VLE) data of [EMIM][TF2N] + DMET and triethylene glycol (TEG) + DMET were measured. The results showed that the popular UNIFAC-Lei model is in good agreement with experimental data. The gas absorption experiment with [EMIM][TF2N] as absorbent was conducted. It demonstrates that the IL has good separation performance for capturing DMET, the absorption ratio being 87.32%. Then, the absorption capacities of 45 ILs for DMET were calculated by COSMO-RS model, while DMET removal mechanism was explored by σ-profiles analysis and molecular dynamics (MD) simulation. Finally, industrial scale process simulation using [EMIM][TF2N] and TEG as absorbents to capture DMET was made. Compared to the benchmark TEG process, the total operating cost and the total annual cost (TAC) in the IL process decrease by 24.06% and 17.15%, respectively. This further proves that ILs have great application potential for the condensable volatile organic compounds (VOCs) capture, especially in energy saving and improving economic benefits.

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Volatile organic compounds degradation by nonthermal plasma: a review

Shen

Alharbi

et al. 2023

Environ Sci Pollut Res

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Evaluation of the absorption performance of new compound absorbents for toluene under extremely high load

Cited by 9 publications

References 32 publications

Condensable Gases Capture with Ionic Liquids

Condensable Gases Capture with Ionic Liquids

Ionic Liquids for Capturing 1,2-Dimethoxyethane (DMET) in VOCs: Experiment and Mechanism Exploration

Volatile organic compounds degradation by nonthermal plasma: a review

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