Physical absorption of CO2 and H2S from synthetic biogas at elevated pressures using hollow fiber membrane contactors: The effects of Henry’s constants and gas diffusivities

Tantikhajorngosol, Puttipong; Laosiripojana, Navadol; Jiraratananon, Ratana; Assabumrungrat, Suttichai

doi:10.1016/j.ijheatmasstransfer.2018.09.076

Cited by 27 publications

(12 citation statements)

References 40 publications

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“…The separation efficiency could reach as high as 96.01% by ignoring the cost of the HMFC module. Tantikhajorngosol et al [31,32] developed a 2D mathematical model for CO 2 and H 2 S absorption at high pressures. The comparison of experimental and numerical results revealed that increasing the pressure changed the membrane wetting conditions and the gas Henry's constant, thereby improving absorption performance.…”

Section: Introductionmentioning

confidence: 99%

Effects of Operating and Structural Parameters on Removal of Nitric Oxide by Oxidation in a Ceramic Hollow Fiber Membrane Contactor

Yuan

2021

Membranes

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A numerical study on the oxidation removal of nitric oxide in a ceramic hollow fiber membrane contactor was performed. To represent the transport and absorption process, the model was created by combining multiphase, species, reaction, and porous models. The numerical results were verified by comparing them with experimental data. The tube and lumen sides both have laminar parabolic velocity distributions. The nitric oxide concentration decreases gradually from the membrane wall to axis at the cross-section except on the inner and outer sides of the membrane tube. The equivalent diffusion length was proved useful for evaluating the entrance effect. At low concentrations, the reduction efficiency was proportional to the absorbent concentration, and at large concentrations, it neared a maximum value. The reduction efficiency was positively affected by elevated operating temperature and pressure. With a gas channel width of 13 mm, the reduction flow rate achieves its maximum. The efficiency of NO reduction per area decreases as the effective membrane length increases. Increasing the operating temperature and membrane length are recommended as design priorities due to high relative enhancements. It is not recommended to improve reduction efficiency by increasing membrane tube diameter and operating pressure in design. Changing the gas flow rate, absorbent concentration and gas channel width are moderate recommended as well.

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Section: Introductionmentioning

confidence: 99%

Effects of Operating and Structural Parameters on Removal of Nitric Oxide by Oxidation in a Ceramic Hollow Fiber Membrane Contactor

Yuan

2021

Membranes

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“…Some commercial applications were carried out for desulphurized biogas upgrading including (Chen et al ., 2015): (1) absorption : water scrubbing, organic physical scrubbing, amine scrubbing and inorganic solvent scrubbing; (2) adsorption : pressure swing adsorption, vacuum swing adsorption, temperature swing adsorption, electrical swing adsorption; (3) cryogenic separation : it is a distillation process operated under very low temperatures (close to −170 °C) and high pressure (around 80 bar). Therefore, for the production of very pure CH 4 this technology can be used; (4) membrane technology (Ibrahim et al ., 2018) under various operation pressure (100 mbar–30 bar) and temperature conditions (17–35 °C) (Vogler et al ., 2013; Falbo et al ., 2014; Žák et al ., 2018; Tantikhajorngosol et al ., 2019).…”

Section: Introductionmentioning

confidence: 99%

Study of livestock biogas upgrading using a pilot-scale photocatalytic desulphurizer followed by a hollow fibre carbon dioxide adsorption module

Chung

2021

J. Agric. Sci.

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The objective of this project is to integrate a domestic photocatalytic desulphurization facility with a biogas upgrading module and try to develop a system for biogas desulphurization and upgrading under ambient conditions. Four photocatalytic desulphurization reactors (PDRs) and one activated carbon reactor (ACR) were applied for biogas desulphurization and filtration under ambient conditions. Moreover, a hollow fibre carbon dioxide (CO2) adsorption module was applied for biogas upgrading. The operation pressure of the PDR and ACR was under ambient pressure. Results showed that hydrogen sulphide removal efficiency of the photocatalytic desulphurizer was about 0.99–1.00 (v/v) under the inlet biogas flow less than 5 litres/min and the concentration of inlet hydrogen sulphide was lower than 5600 mg/m3. For desulphurized biogas upgrading, the removal efficiency of CO2 was higher than 0.90 (v/v) under the outlet biogas flow was 1 litre/min (i.e. inlet biogas flow was about 2 litres/min). However, the ratio of methane in the upgrading biogas was lower than 0.90 (v/v). Thus, nitrogen gas removal cartridges will be integrated with the biogas upgrading module to promote methane concentration in the upgraded biogas.

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“…[4][5][6][7] Hence, membrane technology can be preferred to other separation processes such as adsorption, absorption, and cryogenic distillation. 23,[29][30][31][32][33][34][35][36][37] In addition to process conditions, membrane materials and configurations have also been considered in many studies. 4,8,9 Other major H 2 separation processes include the separation of H 2 from methane (CH 4 ) (natural gas refining) and adjusting the carbon monoxide (CO)/H 2 ratio in the syngas process.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, simulation of HFMs can help to predict optimum operating conditions for minimization of economic costs. 23,[29][30][31][32][33][34][35][36][37] In addition to process conditions, membrane materials and configurations have also been considered in many studies. For example, HFMCs in nonwetted conditions, which apply hydrophobic membrane materials, showed usually better performances due to low resistance against the species transport through the membrane pores.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen recovery from ammonia purge gas by a membrane separator: A simulation study

Maarefian¹,

Bandehali

Azami

et al. 2019

Int J Energy Res

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Summary In this study, a two‐dimensional mathematical model is proposed for modeling the hollow fiber membrane (HFM) separators for hydrogen (H2) recovery unit implemented in the Razi Petrochemical Company (Imam Khomeini Port, Iran) to capture hydrogen from ammonia (NH3) purge gas. In this regard, computational fluid dynamics is applied to solve the equations of momentum and mass transfer in the laminar flow conditions. Axial and radial diffusion for mass transfer inside the membrane fibers and axial diffusion within the shell side of separator were considered. The distributions of concentration, velocity, and mass transfer fluxes were achieved by the model. As the new insights, the effects of feed flow rate and feed gas concentration on mass transfer of H2 were investigated. Moreover, fluid velocity profile and H2 fluxes in the tube (fiber), membrane, and shell sides of the HFM separator were studied. The results of simulation were compared with the industrial data and showed that the present developed model has excellent agreement with the experimental data with a low mean deviation value of 3.5%.

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Physical absorption of CO2 and H2S from synthetic biogas at elevated pressures using hollow fiber membrane contactors: The effects of Henry’s constants and gas diffusivities

Cited by 27 publications

References 40 publications

Effects of Operating and Structural Parameters on Removal of Nitric Oxide by Oxidation in a Ceramic Hollow Fiber Membrane Contactor

Effects of Operating and Structural Parameters on Removal of Nitric Oxide by Oxidation in a Ceramic Hollow Fiber Membrane Contactor

Study of livestock biogas upgrading using a pilot-scale photocatalytic desulphurizer followed by a hollow fibre carbon dioxide adsorption module

Hydrogen recovery from ammonia purge gas by a membrane separator: A simulation study

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