Simultaneous Absorption of H2S and Co<sub>2</sub>Into Aqueous Methyldiethanolamine

Hamour, Noman; Bidarian, Ali; Sandall, Orville C.

doi:10.1080/01496398708068990

Cited by 18 publications

(6 citation statements)

References 19 publications

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“…Since an increase in the gas/liquid flow ratio raises the relative gas to liquid velocity and consequently reduces the contact time between the gas and liquid phases, the results indicate that reactions of the acid gases with the amine solution were limited. This observation is also reported in [5,20] which downgrades the removal performance of both H 2 S and CO 2 .…”

Section: Effect Of Gas/liquid Flow Ratiosupporting

confidence: 77%

Selective Removal of H₂S from Gas Streams with High CO₂ Concentration Using Hollow‐Fiber Membrane Contractors

2018

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Selective and simultaneous separation of H2S and CO2 from CH4 was accomplished in a hollow‐fiber membrane contactor (HFMC). The absorption of both H2S and CO2 using an aqueous solution of methyldiethanolamine (MDEA) was almost complete and acid gases were totally removed. Despite the large difference between H2S and CO2 concentrations, the rate of H2S absorption was not significantly influenced by CO2 absorption. The independent effect and interactions of several process variables on the separation performance of H2S and CO2 were investigated. The results indicated that the membrane contactor could be a highly efficient choice for removal of almost all H2S in the presence of a large CO2 content even at high gas/liquid flow ratio. The selectivity of H2S was about three times higher compared to the conventional absorption packed towers.

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Section: Effect Of Gas/liquid Flow Ratiosupporting

confidence: 77%

Selective Removal of H₂S from Gas Streams with High CO₂ Concentration Using Hollow‐Fiber Membrane Contractors

2018

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“…DEA has largely the same advantages as MEA with lower corrosivity and higher vapor pressure [88]. Abdulrahman and Sebastine [89] studied the effect of MEA, DEA, and MDEA on natural gas sweetening and recommended 35 wt% DEA as the best solvent for cost-effective and simultaneous removal of CO 2 and H 2 S. However, MDEA has gained a significant share of the market in the past two decades due to its several advantageous properties relative to MEA and DEA: high selectivity for H 2 S over CO 2 , high loading capacity, low solvent vapor pressure, low corrosivity, high degradation resistance, and efficient energy utilization [90][91][92][93]. In addition, MEA and DEA form highly stable carbamates in reaction with CO 2 , resulting in a low rate of hydrolysis to bicarbonate.…”

Section: Alkanolaminesmentioning

confidence: 99%

Hydrogen sulfide capture and removal technologies: A comprehensive review of recent developments and emerging trends

Pudi

Rezaei

Signorini

et al. 2022

Separation and Purification Technology

125

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“…MDEA is a tertiary amine known for selectivity toward absorption of H 2 S in the presence of CO 2 . ,,− Previous studies suggest that, using MDEA, it is possible to reach pipeline specifications for H 2 S in the sweet natural gas . Because MDEA has a relatively low vapor pressure, solution evaporation loss for this solvent is low and MDEA can be used in higher concentrations (in comparison to MEA). ,, MDEA concentrations between 20 and 60 wt % have been reported in previous studies. ,,, MDEA degrades harder and exhibits lower corrosion rates compared to primary alkanolamines .…”

Section: Overview Of the Processesmentioning

confidence: 99%

Influence of CO₂ Residual of Regenerated Amine on the Performance of Natural Gas Sweetening Processes Using Alkanolamine Solutions

et al. 2016

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In this research, three suitable alkanolamine solutions are selected for sweetening a natural gas with high H2S content and low CO2/H2S ratio. For each process, six different CO2 fractions in the regenerated solution are selected. On the basis of each CO2 fraction in the regenerated solution, the three processes are designed and simulated using the Aspen HYSYS process simulator to rich pipeline specifications (i.e., H2S content lower than 4 ppm and CO2 content lower than 2 mol %) for the sweet gas. The results of simulation are then economically evaluated using Aspen Economic Evaluation software. The results of simulation and economic evaluation indicate that the diglycolamine (DGA) process is more economical compared to monoethanolamine (MEA) and mixed methyldiethanolamine (MDEA) + MEA processes. Also, it is concluded that there are several advantages in operating the alkanolamine sweetening processes at higher CO2 fractions of the regenerated amine. On the basis of the results of this study, lower total capital costs, lower annual operating costs, and lower energy requirements for regeneration of the solution are obtainable by operating the alkanolamine sweetening processes at higher fractions of CO2 in the regenerated solution.

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Simultaneous Absorption of H2S and Co₂Into Aqueous Methyldiethanolamine

Cited by 18 publications

References 19 publications

Selective Removal of H₂S from Gas Streams with High CO₂ Concentration Using Hollow‐Fiber Membrane Contractors

Selective Removal of H₂S from Gas Streams with High CO₂ Concentration Using Hollow‐Fiber Membrane Contractors

Hydrogen sulfide capture and removal technologies: A comprehensive review of recent developments and emerging trends

Influence of CO₂ Residual of Regenerated Amine on the Performance of Natural Gas Sweetening Processes Using Alkanolamine Solutions

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Simultaneous Absorption of H2S and Co2Into Aqueous Methyldiethanolamine

Cited by 18 publications

References 19 publications

Selective Removal of H2S from Gas Streams with High CO2 Concentration Using Hollow‐Fiber Membrane Contractors

Selective Removal of H2S from Gas Streams with High CO2 Concentration Using Hollow‐Fiber Membrane Contractors

Hydrogen sulfide capture and removal technologies: A comprehensive review of recent developments and emerging trends

Influence of CO2 Residual of Regenerated Amine on the Performance of Natural Gas Sweetening Processes Using Alkanolamine Solutions

Contact Info

Product

Resources

About

Simultaneous Absorption of H2S and Co₂Into Aqueous Methyldiethanolamine

Selective Removal of H₂S from Gas Streams with High CO₂ Concentration Using Hollow‐Fiber Membrane Contractors

Selective Removal of H₂S from Gas Streams with High CO₂ Concentration Using Hollow‐Fiber Membrane Contractors

Influence of CO₂ Residual of Regenerated Amine on the Performance of Natural Gas Sweetening Processes Using Alkanolamine Solutions