Toward a Servoregulation Controller to Automate CO2 Removal in Wearable Artificial Lungs

Effect of Hematocrit on the CO2 Removal Rate of Artificial Lungs

ASAIO Journal ◽

10.1097/mat.0000000000001140 ◽

2020 ◽

Vol 66 (10) ◽

pp. 1161-1165 ◽

Cited By ~ 1

Author(s):

Alexandra G. May ◽

Katelin S. Omecinski ◽

Brian J. Frankowski ◽

William J. Federspiel

Keyword(s):

Removal Rate ◽

Co2 Removal ◽

Artificial Lungs

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In vivo testing of the low-flow CO2 removal application of a compact, platform respiratory device

Intensive Care Medicine Experimental ◽

10.1186/s40635-020-00329-9 ◽

2020 ◽

Vol 8 (1) ◽

Author(s):

Alexandra G. May ◽

Ryan A. Orizondo ◽

Brian J. Frankowski ◽

Sang-Ho Ye ◽

Ergin Kocyildirim ◽

...

Keyword(s):

Low Flow ◽

Co2 Removal ◽

In Vivo Testing

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Coal Fly Ash Derived Silica Nanomaterial for MMMs—Application in CO2/CH4 Separation

Membranes ◽

10.3390/membranes11020078 ◽

2021 ◽

Vol 11 (2) ◽

pp. 78

Author(s):

Marius Gheorghe Miricioiu ◽

Violeta-Carolina Niculescu ◽

Constantin Filote ◽

Maria Simona Raboaca ◽

Gheorghe Nechifor

Keyword(s):

Fly Ash ◽

Pore Size Distribution ◽

Pore Size ◽

Size Distribution ◽

Coal Fly Ash ◽

High Surface ◽

Industrial Applications ◽

Mixed Matrix Membranes ◽

Co2 Removal ◽

Mcm 41

In order to obtained high selective membrane for industrial applications (such as natural gas purification), mixed matrix membranes (MMMs) were developed based on polysulfone as matrix and MCM-41-type silica material (obtained from coal fly ash) as filler. As a consequence, various quantities of filler were used to determine the membranes efficiency on CO2/CH4 separation. The coal fly ash derived silica nanomaterial and the membranes were characterized in terms of thermal stability, homogeneity, and pore size distribution. There were observed similar properties of the obtained nanomaterial with a typical MCM-41 (obtained from commercial silicates), such as high surface area and pore size distribution. The permeability tests highlighted that the synthesized membranes can be applicable for CO2 removal from CH4, due to unnoticeable differences between real and ideal selectivity. Additionally, the membranes showed high resistance to CO2 plasticization, due to permeability decrease even at high feed pressure, up to 16 bar.

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Dynamic process simulation and optimization of CO2 removal from confined space with pressure and temperature swing adsorption

Chemical Engineering Journal ◽

10.1016/j.cej.2021.129104 ◽

2021 ◽

Vol 416 ◽

pp. 129104

Author(s):

Guoxiong Zhan ◽

Lu Bai ◽

Bin Wu ◽

Fei Cao ◽

Yuanmeng Duan ◽

...

Keyword(s):

Dynamic Process ◽

Process Simulation ◽

Co2 Removal ◽

Confined Space ◽

Simulation And Optimization ◽

Temperature Swing ◽

Process Simulation And Optimization ◽

Temperature Swing Adsorption ◽

Dynamic Process Simulation

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CO2 Absorption Using Hollow Fiber Membrane Contactors: Introducing pH Swing Absorption (pHSA) to Overcome Purity Limitation

Membranes ◽

10.3390/membranes11070496 ◽

2021 ◽

Vol 11 (7) ◽

pp. 496

Author(s):

Sayali Ramdas Chavan ◽

Patrick Perré ◽

Victor Pozzobon ◽

Julien Lemaire

Keyword(s):

Hollow Fiber ◽

Recovery Rate ◽

Hollow Fiber Membrane ◽

Operating Conditions ◽

Co2 Removal ◽

Co2 Absorption ◽

Fiber Membrane ◽

Residual Content ◽

Membrane Contactors ◽

Ph Swing

Recently, membrane contactors have gained more popularity in the field of CO2 removal; however, achieving high purity and competitive recovery for poor soluble gas (H2, N2, or CH4) remains elusive. Hence, a novel process for CO2 removal from a mixture of gases using hollow fiber membrane contactors is investigated theoretically and experimentally. A theoretical model is constructed to show that the dissolved residual CO2 hinders the capacity of the absorbent when it is regenerated. This model, backed up by experimental investigation, proves that achieving a purity > 99% without consuming excessive chemicals or energy remains challenging in a closed-loop system. As a solution, a novel strategy is proposed: the pH Swing Absorption which consists of manipulating the acido–basic equilibrium of CO2 in the absorption and desorption stages by injecting moderate acid and base amount. It aims at decreasing CO2 residual content in the regenerated absorbent, by converting CO2 into its ionic counterparts (HCO3− or CO32−) before absorption and improving CO2 degassing before desorption. Therefore, this strategy unlocks the theoretical limitation due to equilibrium with CO2 residual content in the absorbent and increases considerably the maximum achievable purity. Results also show the dependency of the performance on operating conditions such as total gas pressure and liquid flowrate. For N2/CO2 mixture, this process achieved a nitrogen purity of 99.97% with a N2 recovery rate of 94.13%. Similarly, for H2/CO2 mixture, a maximum H2 purity of 99.96% and recovery rate of 93.96% was obtained using this process. Moreover, the proposed patented process could potentially reduce energy or chemicals consumption.

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