Guidelines for Techno-Economic Analysis of Adsorption Processes

Danaci, David; Webley, Paul A.; Petit, Camille

doi:10.3389/fceng.2020.602430

Cited by 48 publications

(40 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…While undertaking techno-economic analyses, the outcomes can significantly change depending on the assumptions and the design choices. 32 Hence, we note that the techno-economic model used in this study obeys both technical and economic recommendations for adsorption processes 32 and are consistent with best practices. 31…”

Section: Evacuation Step (Evac)supporting

confidence: 66%

How much can novel solid sorbents reduce the cost of post-combustion CO2 capture? A techno-economic investigation on the cost limits of pressure-vacuum swing adsorption

Rajendran

Subraveti

Roussanaly

et al. 2021

Preprint

View full text Add to dashboard Cite

This paper focuses on identifying the cost limits of two single-stage pressure-vacuum swing adsorption (PVSA) cycles for post-combustion CO 2 capture if the "ideal" zerocost adsorbent can be discovered. Through an integrated techno-economic optimisation, we simultaneously optimise the adsorbent properties (adsorption isotherms and particle morphology) and process design variables to determine the lowest possible cost of CO 2 avoided (excluding the CO 2 conditioning, transport and storage) for different industrial flue gas CO 2 compositions and flow rates. The CO 2 avoided cost for PVSA ranges from 87.1 to 10.4 per tonne of CO 2 avoided, corresponding to CO 2 feed compositions of 3.5 mol% to 30 mol %, respectively. The corresponding costs for a monoethanolamine based absorption process, using heat from a natural gas plant, are 76.8 and 54.8 per tonne of CO 2 avoided, respectively showing that PVSA can be attractive for flue gas streams with high CO 2 compositions. The "ideal" adsorbents needed to attain the lowest possible CO 2 avoided costs have a range of CO 2 affinities with close to zero N 2 adsorption, demonstrating promise for adsorbent discovery and development. The need for simultaneously optimizing the particle morphology and the process conditions are emphasized.

show abstract

Section: Evacuation Step (Evac)supporting

confidence: 66%

How much can novel solid sorbents reduce the cost of post-combustion CO2 capture? A techno-economic investigation on the cost limits of pressure-vacuum swing adsorption

Rajendran

Subraveti

Roussanaly

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…7,13,20 This model is an extension to the widely utilised Brunauer-Emmett-Teller (BET) equation. [61] The derivation of the BET equation assumes that the first layer of adsorption has a heat of adsorption that is different from every subsequent layer, whilst the subsequent layers have a heat of adsorption equivalent to the latent heat of condensation. Meanwhile, the GAB model improves this by assuming that only the 10 th layer onwards has a heat of adsorption equal to the latent heat of condensation, whilst the 2 nd to 9 th layers have a heat of adsorption that is different to the first layer.…”

Section: H2o Isothermsmentioning

confidence: 99%

The impact of binary water-CO2 isotherm models on the optimal performance of sorbent-based direct air capture processes.

Young

García-Díez

García

et al. 2021

Preprint

View full text Add to dashboard Cite

Direct air capture (DAC) is an auspicious technology in pursuing negative CO2 emissions. A promising process is temperature vacuum swing adsorption (TVSA) employing amine functionalised adsorbents such as Lewatit® VP OC 1065, which is selected as a benchmark sorbent in this study. To further improve process design, and critically lower costs, detailed modelling of DAC cycles is imperative. However, the multi-component adsorption on these materials, particularly the cooperative adsorption of CO2 and H2O, is crudely understood, and yet to be described in mathematical terms, prohibiting sound modelling efforts. Here, we commit in-depth understanding of the effect of humidity on CO2 adsorption and demonstrate how this impacts modelling of DAC cycles. We present two novel mechanistic co-adsorption isotherm models to describe water's effect on CO2 adsorption and find a good fit to original experimental co-adsorption data. We also show the considerable improvement in predictions of these models when compared to an empirical co-adsorption isotherm model from literature. A detailed TVSA DAC cycle process model is then used elucidating how different coadsorption models affect the predicted process performance. It is found that the two novel isotherm models generate similar results and Pareto fronts, whilst the minimum work equivalent calculated using the more conservative of the two models is found to be 2.49 MJ kg -1 for the case study considered.These mathematical descriptions laid out will lead to more accurate modelling and optimisation of cyclic DAC adsorption processes, prompting a greater understanding of the material-process combinations ideal for DAC and how costs can be driven down in the years to come. Importantly, they allowed us to independently benchmark a Climeworks type DAC process, providing key DAC performance data to the public domain.

show abstract

“…Where The specific thermal energy is subsequently converted to specific equivalent work via the Carnot efficiency as per the guidance of Danaci et al 59 This allows for both forms of specific energy, thermal and work, to be collected into one term. The equation for this conversion is shown in Equation 25.…”

mentioning

confidence: 99%

“…is taken as 0.75 since Danaci et al state that values between 0.7 and 0.8 are appropriate. 59 The physical packed-bed column model was implemented in the gPROMS custom modelling suite. 60 The partial differential equations were first discretised using a 2 nd order central finite differences method.…”

mentioning

confidence: 99%

The impact of binary water-CO2 isotherm models on the optimal performance of sorbent-based direct air capture processes.

Young¹,

García-Díez²,

García³

et al. 2021

Preprint

View full text Add to dashboard Cite

First, an investigation of the co-adsorption of water and CO<sub>2</sub> onto a benchmark amine-functionalised adsorbent. Following on from this is a detailed process modelling and optimisation study of this sorbents performance in a direct air capture process. Next is a demonstration how the results are affected by the co-adsorption descriptions. Finally, a comparison between the modelled direct air capture process to existing and literature processes to benchmark the energy consumption of direct air capture.

show abstract

Guidelines for Techno-Economic Analysis of Adsorption Processes

Cited by 48 publications

References 55 publications

How much can novel solid sorbents reduce the cost of post-combustion CO2 capture? A techno-economic investigation on the cost limits of pressure-vacuum swing adsorption

How much can novel solid sorbents reduce the cost of post-combustion CO2 capture? A techno-economic investigation on the cost limits of pressure-vacuum swing adsorption

The impact of binary water-CO2 isotherm models on the optimal performance of sorbent-based direct air capture processes.

The impact of binary water-CO2 isotherm models on the optimal performance of sorbent-based direct air capture processes.

Contact Info

Product

Resources

About