Measuring the density and viscosity of H 2 S-loaded aqueous methyldiethanolamine solution

Shokouhi, Mohammad; Ahmadi, Reza

doi:10.1016/j.jct.2016.06.007

Cited by 15 publications

(18 citation statements)

References 46 publications

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“…The accuracy of the Anton Paar densimeter has been verified in our previous works. 54,78 However, the density of pure water and aqueous MDEA (0.3228 mass fraction) + PZ (0.0516 mass fraction) solution, was measured, and the results were compared with the values reported in the literature. 79,89 Table 6 shows that there is quite good consistency between the density values measured in this work and the corresponding data reported in the literature.…”

Section: Resultsmentioning

confidence: 99%

“…The DMA HPM density measuring cell was a U-shaped Hastelloy C-276 tube, electronically excited to vibrate at its characteristic frequency, which depends on the density of the sample. The densimeter was first calibrated, according to the procedure described in detail in our previous works, , using distilled deionized water at the temperature range of this work. The estimated standard uncertainty associated with density measurements, u (ρ), was 0.5 kg·m –3 .…”

Section: Methodsmentioning

confidence: 99%

“…However, there are no data on the solubility of H 2 S in MDEA + PZ + SFL mixed solvent. In recent years, some H 2 S equilibrium solubility measurements in alkanolamine solutions have been reported in three categories of MDEA, MDEA-based, ,− and non-MDEA-based ,,,− solutions in aqueous and hybrid context with and without inert gas makeup. ,,,− The corresponding reports, together with the temperature and pressure ranges, are shown in Table .…”

Section: Introductionmentioning

confidence: 99%

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Vapor–Liquid Equilibria of H₂S in Aqueous Mixtures of N-Methyldiethanolamine + Piperazine + Sulfolane

Shokouhi¹,

Zoghi²,

Jalili³

et al. 2021

J. Chem. Eng. Data

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The solubility of hydrogen sulfide (H2S) in a mixed solvent containing (19.5 to 35.5) mass percent of N-methyldiethanolamine (MDEA), (0 to 11.6) mass percent of piperazine (PZ), (0 to 10) mass percent of sulfolane (SFL), and water at temperatures of (313.15 to 353.15) K and H2S partial pressures of up to about 2 MPa is reported. To determine the absorption of H2S, the density of the solutions in the corresponding temperature range was measured using a vibrating-tube densimeter. The results show that H2S solubility decreases with increasing temperature and increases with partial pressure of H2S. In addition, increasing PZ concentration can enhance the absorption capacity of MDEA, as a benchmark alkanolamine, in aqueous and mixed aqueous sulfolane solutions in the low-loading region. A thermodynamic model based on the extended Debye–Hükel theory, namely Deshmukh-Mather model for the liquid phase, combined with the Peng-Robinson equation of state for the gas phase, was applied to correlate the H2S solubility data obtained. The average absolute deviation of the correlated data from the experimental data is 6.5%, which implies good correlative accuracy of the thermodynamic model employed in this work.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Vapor–Liquid Equilibria of H₂S in Aqueous Mixtures of N-Methyldiethanolamine + Piperazine + Sulfolane

Shokouhi¹,

Zoghi²,

Jalili³

et al. 2021

J. Chem. Eng. Data

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“…MDEA aqueous solution is preferred in the industry acid gas purification process due to its advantages of relatively low energy for regeneration, low corrosivity, low vapor pressure, high absorption capacity, and high resistance to degradation. − Many studies have been done to investigate the physical properties of the MDEA aqueous solution, including density, − viscosity, − surface tension, − and solubility of H 2 S. − Besides, Abukashabeh et al investigated the effect of thermal degradation time on the density and viscosity of the MDEA aqueous solution. Alhseinat et al investigated the effect of degradation products on the foam behavior of the MDEA aqueous solution.…”

Section: Introductionmentioning

confidence: 99%

Absorption and Removal Efficiency of Low-Partial-Pressure H₂S in a Tetramethylammonium Glycinate Activated N-Methyldiethanolamine Aqueous Solution

Tian

Wang

2019

Energy Fuels

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The absorption performance including absorption capacity and loading values of low-partial-pressure H2S in tetramethylammonium glycinate ([N1111][Gly]) promoted N-methyldiethanolamine (MDEA) aqueous solution was measured. The apparent absorption rate was calculated from the time-dependent absorption capacity. The effects of absorbent composition, temperature, and H2S partial pressure on absorption capacity and apparent absorption rate were demonstrated. The H2S removal efficiency was verified in a tray tower using the [N1111][Gly]–MDEA aqueous solution as an absorbent, and the results show that the removal efficiency can reach 100%, which met the requirement of the first degree of Chinese cleaner production standard (coking industry, HJ/T 126-2003, I, H2S ≤ 0.2 g/m3). Compared with the traditional amine-based absorbents like MDEA–monoethanolamine aqueous solution, the [N1111][Gly]-promoted MDEA aqueous solution has a higher absorption capacity and a higher absorption rate for H2S. Moreover, when the mass fraction of MDEA reaches up to 50%, the removal efficiency in the tray tower can still reach 100%. The decrease of the water content in the absorbent can greatly reduce the energy cost of the regeneration of rich solution and the cooling of poor solution. Therefore, the new absorbent proposed in this work has good commercial application potential in the field of desulfurization of the coke oven gas.

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“…Good and reliable physicochemical data of unloaded and CO 2 -loaded aqueous alkanolamine solution such as viscosity, surface tension, density, thermal conductivity, heat capacity, and thermodynamic equilibrium are essential for designing both the absorber and the stripper with auxiliary equipment. Previously reported experimental data on the viscosity of aqueous MDEA-PZ solutions are tabulated in Table S1. − ,,− The availability of literature for viscosity of aqueous MDEA-PZ solutions is limited in compositions and temperatures. The present paper reports new viscosity data for aqueous MDEA-PZ solutions in unloaded and CO 2 -loaded solutions.…”

Section: Introductionmentioning

confidence: 99%

Viscosity Measurement and Correlation of Unloaded and CO₂-Loaded Aqueous Solutions of N-Methyldiethanolamine-Piperazine

2019

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New and complementary viscosity data for aqueous N-methyldiethanolamine-piperazine (MDEA-PZ) solutions with and without CO2 are presented in this paper for different temperatures and mass fractions. The first part of this work represents viscosity of pure and aqueous MDEA to validate the measurement system. The second part represents viscosity of unloaded aqueous MDEA-PZ solutions with total mass fractions of MDEA ranging from 0.20 to 0.40 and PZ mass fractions at 0.05 and 0.1. Two different techniques for representing viscosity of the unloaded systems are discussed. The third part of this paper reports viscosities of CO2-loaded aqueous MDEA-PZ at different CO2 loadings. These data were correlated using a modified Setschenow equation.

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Measuring the density and viscosity of H 2 S-loaded aqueous methyldiethanolamine solution

Cited by 15 publications

References 46 publications

Vapor–Liquid Equilibria of H₂S in Aqueous Mixtures of N-Methyldiethanolamine + Piperazine + Sulfolane

Vapor–Liquid Equilibria of H₂S in Aqueous Mixtures of N-Methyldiethanolamine + Piperazine + Sulfolane

Absorption and Removal Efficiency of Low-Partial-Pressure H₂S in a Tetramethylammonium Glycinate Activated N-Methyldiethanolamine Aqueous Solution

Viscosity Measurement and Correlation of Unloaded and CO₂-Loaded Aqueous Solutions of N-Methyldiethanolamine-Piperazine

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Measuring the density and viscosity of H 2 S-loaded aqueous methyldiethanolamine solution

Cited by 15 publications

References 46 publications

Vapor–Liquid Equilibria of H2S in Aqueous Mixtures of N-Methyldiethanolamine + Piperazine + Sulfolane

Vapor–Liquid Equilibria of H2S in Aqueous Mixtures of N-Methyldiethanolamine + Piperazine + Sulfolane

Absorption and Removal Efficiency of Low-Partial-Pressure H2S in a Tetramethylammonium Glycinate Activated N-Methyldiethanolamine Aqueous Solution

Viscosity Measurement and Correlation of Unloaded and CO2-Loaded Aqueous Solutions of N-Methyldiethanolamine-Piperazine

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Vapor–Liquid Equilibria of H₂S in Aqueous Mixtures of N-Methyldiethanolamine + Piperazine + Sulfolane

Vapor–Liquid Equilibria of H₂S in Aqueous Mixtures of N-Methyldiethanolamine + Piperazine + Sulfolane

Absorption and Removal Efficiency of Low-Partial-Pressure H₂S in a Tetramethylammonium Glycinate Activated N-Methyldiethanolamine Aqueous Solution

Viscosity Measurement and Correlation of Unloaded and CO₂-Loaded Aqueous Solutions of N-Methyldiethanolamine-Piperazine