Modelling of equilibrium working capacity of PSA, TSA and TVSA processes for CO 2 adsorption under direct air capture conditions

Elfving, Jere; Bajamundi, Cyril; Kauppinen, Juho; Sainio, Tuomo

doi:10.1016/j.jcou.2017.10.010

Cited by 104 publications

(68 citation statements)

References 21 publications

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“…Thes orbent demonstrated remarkable stability over 40 consecutive sorption/desorption cycles,with acyclic CO 2 capture capacity of 0.8 mmol/g under dry conditions and apressure in the regeneration chamber of 200 mbar.Inthe combined TVS cycle,more than 90 % of the required energy input can be supplied as heat (< 100 8 8C), which could be derived from waste heat or solar thermal sources.W urzbacher et al pointed out that combining air capture with the solar-driven splitting of CO 2 offers ac losed-material cycle for producing synthetic liquid hydrocarbon fuels. [228] Elfving et al [229] modeled the equilibrium working capacity (EWC) of pressure-swing adsorption (PSA), temperature-swing adsorption (TSA), and temperature-vacuum swing adsorption (TVSA) processes for CO 2 sorption under DACc onditions.F or PSA, EWC values greater than 0.5 mmol CO 2 /g sorbent could not be achieved without exceeding reasonable boundaries for the vacuum pressure.I nc ontrast, with TSA and TVSA, EWC values greater than 0.7 mmol CO 2 /g sorbent could be reached under either dry and cold or warm and humid ambient conditions during CO 2 sorption at 400 ppm. Lively and Realff [230] presented athermodynamic analysis of the adsorption processes in the TSA and PSA modes during dilute gas separations and bulk gas separations.This study revealed that the TSA was more thermodynamically efficient at dilute concentrations of the adsorbate feed than bulk gas separations.C onversely,t he PSA system was more thermodynamically efficient for bulk gas separations.…”

Section: Class 2s Orbentsmentioning

confidence: 99%

Sorbents for the Direct Capture of CO₂ from Ambient Air

et al. 2020

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The urgency to address global climate change induced by greenhouse gas emissions is increasing. In particular, the rise in atmospheric CO2 levels is generating alarm. Technologies to remove CO2 from ambient air, or “direct air capture” (DAC), have recently demonstrated that they can contribute to “negative carbon emission.” Recent advances in surface chemistry and material synthesis have resulted in new generations of CO2 sorbents, which may drive the future of DAC and its large‐scale deployment. This Review describes major types of sorbents designed to capture CO2 from ambient air and they are categorized by the sorption mechanism: physisorption, chemisorption, and moisture‐swing sorption.

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Section: Class 2s Orbentsmentioning

confidence: 99%

Sorbents for the Direct Capture of CO₂ from Ambient Air

et al. 2020

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“…If there is moisture in the air and the air temperature is sufficient, liquid water is formed during the separation process. In humid conditions with a temperature of + 25°C, the molar ratio of separated H 2 O per CO 2 is 4.9 (Elfving et al 2017). If the separated water does not hold any harmful impurities, it can be used to replace fresh water consumed in production processes.…”

Section: Source Of Comentioning

confidence: 99%

A life cycle environmental sustainability analysis of microbial protein production via power-to-food approaches

Sillman

Uusitalo

Ruuskanen

et al. 2020

Int J Life Cycle Assess

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Purpose Renewable energy produced from wind turbines and solar photovoltaics (PV) has rapidly increased its share in global energy markets. At the same time, interest in producing hydrocarbons via power-to-X (PtX) approaches using renewables has grown as the technology has matured. However, there exist knowledge gaps related to environmental impacts of some PtX approaches. Power-to-food (PtF) application is one of those approaches. To evaluate the environmental impacts of different PtF approaches, life cycle assessment was performed. Methods The theoretical environmental potential of a novel concept of PtX technologies was investigated. Because PtX approaches have usually multiple technological solutions, such as the studied PtF application can have, several technological setups were chosen for the study. PtF application is seen as potentially being able to alleviate concerns about the sustainability of the global food sector, for example, as regards the land and water use impacts of food production. This study investigated four different environmental impact categories for microbial protein (MP) production via different technological setups of PtF from a cradle-to-gate perspective. The investigated impact categories include global warming potential, blue-water use, land use, and eutrophication. The research was carried out using a life cycle impact assessment method. Results and discussion The results for PtF processes were compared with the impacts of other MP production technologies and soybean production. The results indicate that significantly lower environmental impact can be achieved with PtF compared with the other protein production processes studied. The best-case PtF technology setups cause considerably lower land occupation, eutrophication, and blue-water consumption impacts compared with soybean production. However, the energy source used and the electricity-to-biomass efficiency of the bioreactor greatly affect the sustainability of the PtF approach. Some energy sources and technological choices result in higher environmental impacts than other MP and soybean production. When designing PtF production facilities, special attention should thus be given to the technology used. Conclusions With some qualifications, PtF can be considered an option for improving global food security at minimal environmental impact. If the MP via the introduced application substitutes the most harmful practices of production other protein sources, the saved resources could be used to, for example, mitigation purposes or to improve food security elsewhere. However, there still exist challenges, such as food safety–related issues, to be solved before PtF application can be used for commercial use.

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“…wiesen darauf hin, dass die Kombination der Gewinnung aus der Luft mit der solarbetriebenen Spaltung von CO 2 einen geschlossenen Stoffkreislauf für die Herstellung von synthetischen flüssigen Kohlenwasserstoffbrennstoffen bietet . Elfving et al . modellierten die “Equilibrium Working Capacity” (EWC) der Vakuum‐Wechsel‐Adsorption (VSA), der Temperatur‐Wechsel‐Adsorption (TSA) und der Vakuum‐Druckwechsel‐Adsorption (TVSA) für die CO 2 ‐Sorption bei DAC‐Bedingungen.…”

Section: Sorbenten Zur Gewinnung Von Co2 Aus Der Umgebungsluftunclassified

Sorbenten zur direkten Gewinnung von CO₂ aus der Umgebungsluft

et al. 2020

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Die Dringlichkeit, den durch Treibhausgasemissionen verursachten globalen Klimawandel anzugehen, wächst von Tag zu Tag. Insbesondere der Anstieg der atmosphärischen CO2‐Werte löst Alarm aus. Technologien zum Absorbieren von CO2 aus der Umgebungsluft, oder “Direct Air Capture” (DAC), haben kürzlich gezeigt, dass sie zu “negativen Kohlenstoffemissionen” beitragen können. Die jüngsten Fortschritte in der Oberflächenchemie und der Materialsynthese haben neue Generationen von CO2‐Sorptionsmitteln ermöglicht, die möglicherweise die Zukunft von DAC und seiner großangelegten Verwendung vorantreiben können. In diesem Aufsatz werden die wichtigsten Arten von Sorptionsmitteln zur Gewinnung von CO2 aus der Umgebungsluft beschrieben und nach Sorptionsmechanismen kategorisiert: Physisorption, Chemisorption und Feuchtigkeitswechsel‐Sorption.

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Modelling of equilibrium working capacity of PSA, TSA and TVSA processes for CO 2 adsorption under direct air capture conditions

Cited by 104 publications

References 21 publications

Sorbents for the Direct Capture of CO₂ from Ambient Air

Sorbents for the Direct Capture of CO₂ from Ambient Air

A life cycle environmental sustainability analysis of microbial protein production via power-to-food approaches

Sorbenten zur direkten Gewinnung von CO₂ aus der Umgebungsluft

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Modelling of equilibrium working capacity of PSA, TSA and TVSA processes for CO 2 adsorption under direct air capture conditions

Cited by 104 publications

References 21 publications

Sorbents for the Direct Capture of CO2 from Ambient Air

Sorbents for the Direct Capture of CO2 from Ambient Air

A life cycle environmental sustainability analysis of microbial protein production via power-to-food approaches

Sorbenten zur direkten Gewinnung von CO2 aus der Umgebungsluft

Contact Info

Product

Resources

About

Sorbents for the Direct Capture of CO₂ from Ambient Air

Sorbents for the Direct Capture of CO₂ from Ambient Air

Sorbenten zur direkten Gewinnung von CO₂ aus der Umgebungsluft