Thermal stability of polyethylenimine based carbon dioxide adsorbents and its influence on selection of regeneration strategies

Drage, Trevor C.; Arenillas, A.; Smith, K.M.; Snape, Colin E.

doi:10.1016/j.micromeso.2008.05.009

Cited by 256 publications

(294 citation statements)

References 18 publications

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“…In biogas upgrading applications, air may be used as stripping agent instead, to save on operational costs for steam production. However, for some adsorbent materials, the presence of oxygen in combination with higher operating temperatures might lead to increased adsorbent degradation [12,13]. Hence, depending on the utilized adsorbent material, the desorber inventory and operating temperature could be limited in case air is used as stripping agent.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of zeolite 13X and Lewatit® VP OC 1065 for application in a continuous temperature swing adsorption process for biogas upgrading

Sonnleitner

Schöny

Hofbauer

2017

Biomass Conv. Bioref.

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Two commercially available CO 2 -adsorbent materials (i.e., zeolite 13X (13X) and Lewatit® VP OC 1065 (Lewatit)) were evaluated for their applicability in a continuous temperature swing adsorption (TSA) process for biogas upgrading. The equilibrium adsorption characteristics of carbon dioxide and methane were determined by fixed bed and TGA tests. While relatively high CO 2 capacities were measured for both materials (3.6 and 2.5 mol kg), neither of them was found to adsorb significant amounts of CH 4 . Lewatit showed to be fully regenerable at 95°C, whereas for 13X, the regeneration was not complete at this temperature. However, 13X showed no degradation up to 190°C, whereas Lewatit started to degrade at 110 and 90°C when exposed to N 2 and air, respectively. Fluidization tests showed that Lewatit provides a high mechanical stability, while on the contrary, the tested 13X showed considerable attrition. An equilibrium adsorption model was fitted to the measured CO 2 adsorption data. The adsorption model was then integrated into an existing simulation tool for the proposed TSA process to roughly estimate the expectable regeneration energy demand for both materials. It was found that depending on the operating conditions, the regeneration energy demand lies between 0.32-0.54 kWh th /m 3 prodgas for 13X and 0.71-1.10 kWh th /m 3 prodgas for Lewatit. Since heat integration measures were not considered in the simulations, it was concluded that the proposed TSA process has a great potential to reduce the overall energy demand for biogas upgrading and that both tested adsorbent materials may be suitable for application in the proposed TSA process.

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Section: Introductionmentioning

confidence: 99%

“…More recently, solid amine sorbents have been proposed and developed as new adsorbent class for post-combustion CO 2 capture applications [13,[29][30][31]. In general, these materials consist of a porous polymeric, organic, or inorganic support, on which functional amine groups are immobilized.…”

Section: Introductionmentioning

confidence: 99%

Assessment of zeolite 13X and Lewatit® VP OC 1065 for application in a continuous temperature swing adsorption process for biogas upgrading

Sonnleitner

Schöny

Hofbauer

2017

Biomass Conv. Bioref.

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“…As noted above, this has most often been achieved in literature reports by providing two driving forces for desorption: (1) a partial pressure driving force by passing a CO 2 -free, inert gas flow over the sample; and (2) a heat input, usually in the form of a thermally heated reactor. Two potential more practical approaches to achieve sorbent regeneration are (1) heating the sorbent in a pure CO 2 stream, [47,62] and (2) steam stripping. In the former case, the only driving force for desorption is thermal, and the significant gas-phase CO 2 pressure severely limits how much CO 2 will desorb.…”

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confidence: 99%

Steam‐Stripping for Regeneration of Supported Amine‐Based CO₂ Adsorbents

et al. 2010

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The world continues to rely heavily on energy supplied by fossil fuels, and the forecast for future energy supply and demand does not indicate that fossil fuel use will diminish substantially in the coming years. The use of these energy resources releases huge amounts of CO 2 into the atmosphere every year and there is increased pressure throughout the world to limit these releases as a consequence of the impact of CO 2 on global climate change. A primary method to limit the release of CO 2 is to trap it at its release point (carbon capture) for storage via one of several potential storage technologies (sequestration).[1] A key roadblock is the development of cost-effective CO 2 capture/separation technologies, because these represent the majority of the costs in oceanic or geologic sequestration scenarios.[2] In capturing CO 2 for beneficial uses, such as feeding algae farms for biofuel production, the capture costs represent the entire cost of the CO 2 supply.The current benchmark method for CO 2 capture from gas streams uses aqueous amine solutions (e.g., ca. 40 % monoethanolamine and ca. 60 % water) to absorb CO 2 , and this approach has been suggested for CO 2 capture from power plant effluents.[3] In parallel, solid adsorbents based on supported amines have been evaluated and show promising CO 2 adsorption properties. Among the various classes of solid CO 2 adsorbents, supported amines have many promising features, such as operation at low temperatures (ambient-120 8C). In addition, they have strong CO 2 -sorbent interactions (50-105 kJ mol À1 ), acting as unique, low-temperature chemisorbants.[4] In contrast, most other low-temperature adsorbents such as zeolites, carbons, and (some) metal-organic frameworks (MOFs) rely on weaker physisorption interactions, making water, a common component in flue gas, out-compete CO 2 for adsorption cites in many cases. Indeed, there are over 70 publications in the open literature that explore the CO 2 -adsorption properties of supported amine adsorbents. [2, However, to be a practical CO 2 sorbent, the cost-effective regeneration of the material must be demonstrated. Unfortunately, the singular focus of the academic community to date has been on design of high capacity adsorbents, with nearly all published studies focusing entirely on the capture step. [4] Adsorbents are routinely shown to be at least partly regenerable, but almost always via temperature swing with an inert gas purge, which ultimately does not result in a separation.[75] Of course, this regeneration method is entirely impractical in a real process and it is used in the laboratory simply for convenience. Despite this, it is noteworthy that nearly all previous published research, including our own, has not effectively concentrated the CO 2 , or performed a useful separation. Thus, a critical missing link in the development of supported amine CO 2 -adsorbents are studies of practical desorption processes.Supported amine CO 2 sorbents are most effectively regenerated in a temperature swing process, as signif...

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“…In the second bed CO 2 is removed (the sorbent is regenerated), for example by fanning nitrogen (e.g. Zhao et al, 2013a;Drage et al, 2008). Table 1; labels indicate the slope |γ ′ | = 100 |γ|: the loss of adsorption capacity per cy of the aging sorbent.…”

Section: Standard Replacement Methodsmentioning

confidence: 99%

Selective strategy for solid sorbent replacement in CCS

Colantuono

Cockerill

2017

Chemical Engineering Research and Design

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Please cite this article as: Giuseppe Colantuono, Timothy Cockerill, Selective strategy for solid sorbent replacement in CCS, (2017), http://dx.doi.org/10. 1016/j.cherd.2017.01.030 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Page 1 of 21A c c e p t e d M a n u s c r i p tThe continuous replacement of solid sorbent in post-combustion CCS loops is modeled. The known method removes/replaces a constant amount of sorbent after each iteration. Known method discards fresher material, too, as the looping sorbent is fully mixed. We can sort removed CO2-loaded sorbent: the fresher is denser due to higher capacity. Our novel strategy puts freshest sorbent back; we compute the reduced need of sorbent. *Research HighlightsPage 2 of 21 AbstractAn innovative method for sorbent replacement in the looping of a generic solid sorbent for post-combustion carbon capture and sequestration (CCS) is introduced. First, the standard replacement method is revisited with some original results presented. A new strategy is then modeled, aimed at selectively replacing the material as it degrades. This method exploits the density difference, after adsorption, between relatively fresh, CO 2 -laden sorbent and relatively degraded material, with small residual adsorption capacity. The model is then applied to values of degradation rate within the experimental range available in scientific literature for silica-supported amines (SSA). The selective removal strategy ideally allows a saving of 37% of the sorbent with respect to the standard, undifferentiated replacement considered in first place, while keeping the same adsorptive capacity of the system.

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Thermal stability of polyethylenimine based carbon dioxide adsorbents and its influence on selection of regeneration strategies

Cited by 256 publications

References 18 publications

Assessment of zeolite 13X and Lewatit® VP OC 1065 for application in a continuous temperature swing adsorption process for biogas upgrading

Assessment of zeolite 13X and Lewatit® VP OC 1065 for application in a continuous temperature swing adsorption process for biogas upgrading

Steam‐Stripping for Regeneration of Supported Amine‐Based CO₂ Adsorbents

Selective strategy for solid sorbent replacement in CCS

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Thermal stability of polyethylenimine based carbon dioxide adsorbents and its influence on selection of regeneration strategies

Cited by 256 publications

References 18 publications

Assessment of zeolite 13X and Lewatit® VP OC 1065 for application in a continuous temperature swing adsorption process for biogas upgrading

Assessment of zeolite 13X and Lewatit® VP OC 1065 for application in a continuous temperature swing adsorption process for biogas upgrading

Steam‐Stripping for Regeneration of Supported Amine‐Based CO2 Adsorbents

Selective strategy for solid sorbent replacement in CCS

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Product

Resources

About

Steam‐Stripping for Regeneration of Supported Amine‐Based CO₂ Adsorbents