Absorption of H<sub>2</sub>S by an Aqueous Methyldiethanolamine Solution at 296 and 343 K

Pani, Fatos; Gaunand, Alain; Richon, Dominique; Cadours, Renaud; Bouallou, Chakib

doi:10.1021/je970062d

Cited by 21 publications

(12 citation statements)

References 14 publications

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“…Amines used for this purpose are monoethylamine (MEA), diethylamine (DEA), methyldiethylamine (MDEA) and diisopropyl amine (DIPA). MDEA is widely used due to its high selectivity for H2S, but a drawback is the large fraction of CO2 slipping through unabsorbed [18,19].…”

Section: Contaminantmentioning

confidence: 99%

A Medium-Scale 50 MWfuel Biomass Gasification Based Bio-SNG Plant: A Developed Gas Cleaning Process

et al. 2015

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Natural gas is becoming increasingly important as a primary energy source. A suitable replacement for fossil natural gas is bio-SNG, produced by biomass gasification, followed by methanation. A major challenge is efficient gas cleaning processes for removal of sulfur compounds and other impurities. The present study focuses on development of a gas cleaning step for a product gas produced in a 50 MWfuel gasification system. The developed gas cleaning washing process is basically a modification of the Rectisol process. Several different process configurations were evaluated using Aspen plus, including PC-SAFT for the thermodynamic modeling. The developed configuration takes advantage of only one methanol wash column, compared to two columns in a conventional Rectisol process. Results from modeling show the ability of the proposed configuration to remove impurities to a sufficiently low concentrations -almost zero concentration for H2S, CS2, HCl, NH3 and HCN, and approximately 0.01 mg/Nm 3 for COS. These levels are acceptable for further upgrading of the gas in a methanation process. Simultaneously, up to 92% of the original CO2 is preserved in the final cleaned syngas stream. No process integration or economic consideration was performed within the scope of the present study, but will be investigated in future projects to improve the overall process.

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Section: Contaminantmentioning

confidence: 99%

A Medium-Scale 50 MWfuel Biomass Gasification Based Bio-SNG Plant: A Developed Gas Cleaning Process

et al. 2015

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“…A new measurement apparatus based on the Lewis cell , design presented by Pani et al , was taken into use in the laboratory and validated for measuring absorption kinetics using a known absorption experiment of CO 2 absorption into MDEA. A new Arrhenius equation was derived, where all available literature data for MDEA is taken into account.…”

Section: Discussionmentioning

confidence: 99%

“…The principal part of the apparatus consists of a Lewis cell, , designed and constructed in-house. Similar apparatus has been utilized by Pani et al , for H 2 S and CO 2 absorption measurement data into aqueous solutions of MDEA, and their measurements were used as a reference when validating our cell performance. The cell consists of a glass casing with metallic flanges on both ends.…”

Section: Methodsmentioning

confidence: 99%

Study of CO₂ Absorption into Phase Change Solvents MAPA and DEEA

et al. 2017

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This work provides new data for carbon dioxide (CO2) absorption into phase change solvent systems consisting of an aqueous solution of 2-(diethylamino)ethanol (DEEA) and 3-(methylamino)propylamine (MAPA). The variables related to CO2 absorption are studied and a Lewis cell type apparatus is taken into use. The latter was first validated with experiments of CO2 absorption into aqueous methyl diethanolamine (MDEA) solutions. Experiments are carried out for the determination of apparent kinetic absorption constant and absorption rate of CO2 for aqueous DEEA/MAPA mixtures. The determined kinetic constants (0.008–0.007 mol·(m3·s)−1 for MAPA/DEEA between 308 and 318 K and 0.0184–0.0022 m3·(mol·s)−1 for MDEA between 296 and 318 K) are compared to the literature where available. The phenomena related to phase change solvent absorption are carefully studied. A relation between total CO2 loading and absorption rate is observed, and reasons behind the dependency and the phenomena are analyzed.

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“…Alkanolamine solutions procure good solubility conditions for acidic exhaust gases (Pani et al, 1997;Rebolledo-Libreros and Trejo, 2004;Sidi-Boumedine et al, 2004). Trauffer (1994) provided some insights regarding the performance of amines on sulfide species and reported nearly 100% conversions for H 2 S and CH 3 SH discharged from a condensation tank vent (Table 1, line 5).…”

Section: Liquid-phase Absorptionmentioning

confidence: 99%

Advances in Chemical Oxidation of Total Reduced Sulfur from Kraft Mills Atmospheric Effluents

Petre¹,

Piché²,

Normandin³

et al. 2007

International Journal of Chemical Reactor Engineering

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Chemical oxidation techniques in use for the reduction of malodorous total reduced sulfur (TRS) emissions in the kraft mills atmospheric effluents were reviewed with an emphasis on recent industrial improvements in chlorine dioxide (ClO 2 ) oxidation of TRS as well as on laboratory developments of an iron-based chemistry process. The ClO 2 approach was implemented successfully at the industrial scale in two Québec kraft mills. The approach consisted in mixing the non-condensable gases (NCG) containing the TRS with gaseous chlorine dioxide obtained either as a residue from a bleach plant vent stream or through vaporization of fresh solution. Full-scale tests have shown that the amount of chlorine dioxide injected or mixed in the NCG was sufficient to reduce the TRS load below the 10 ppmv-regulated levels in a cost efficient way as compared with incineration. A prospective approach validated in laboratory conditions and using the iron redox chemistry for alkaline oxidative scrubbing of TRS is being investigated at Laval University to reduce the odor pollution and to convert TRS into valuable sulfur. Two configurations were evaluated, one consisting of homogeneous Fe(III) sequestered in trans-1,2-diaminocyclohexanetetraacetic acid (cdta) chelates and another of heterogeneous Fe(III) as Fe/Ce oxides-hydroxides mixtures. The relative performances, advantages and weaknesses of the various chemical oxidation processes were discussed. In addition, the fundamentals of the alkaline oxidative scrubbing of TRS using the iron-based alkaline approach were summarized in terms of the gas-liquid thermodynamic equilibria and of the homogeneous and heterogeneous iron redox reactions.

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Absorption of H₂S by an Aqueous Methyldiethanolamine Solution at 296 and 343 K

Cited by 21 publications

References 14 publications

A Medium-Scale 50 MWfuel Biomass Gasification Based Bio-SNG Plant: A Developed Gas Cleaning Process

A Medium-Scale 50 MWfuel Biomass Gasification Based Bio-SNG Plant: A Developed Gas Cleaning Process

Study of CO₂ Absorption into Phase Change Solvents MAPA and DEEA

Advances in Chemical Oxidation of Total Reduced Sulfur from Kraft Mills Atmospheric Effluents

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Absorption of H2S by an Aqueous Methyldiethanolamine Solution at 296 and 343 K

Cited by 21 publications

References 14 publications

A Medium-Scale 50 MWfuel Biomass Gasification Based Bio-SNG Plant: A Developed Gas Cleaning Process

A Medium-Scale 50 MWfuel Biomass Gasification Based Bio-SNG Plant: A Developed Gas Cleaning Process

Study of CO2 Absorption into Phase Change Solvents MAPA and DEEA

Advances in Chemical Oxidation of Total Reduced Sulfur from Kraft Mills Atmospheric Effluents

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Absorption of H₂S by an Aqueous Methyldiethanolamine Solution at 296 and 343 K

Study of CO₂ Absorption into Phase Change Solvents MAPA and DEEA