CO2 separation and landfill biogas upgrading: A comparison of 4A and 13X zeolite adsorbents

Montanari, Tania; Finocchio, Elisabetta; Salvatore, Enrico; Garuti, Gilberto; Giordano, Andrea; Pistarino, C.; Busca, Guido

doi:10.1016/j.energy.2010.10.038

Cited by 121 publications

(80 citation statements)

References 30 publications

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“…Based on the mentioned findings, reported by Li [22] and Montanari [23] for NaX-type adsorbents (also known as Zeolite 13X), this material was identified as potential adsorbent material for the proposed TSA process. However, it was decided to perform an own experimental evaluation on a 13X zeolite.…”

Section: Methodsmentioning

confidence: 86%

“…So far, several solid adsorbent materials have been in use already for pressure swing adsorption processes, where high adsorption capacities under elevated pressure are required [18,19]. Among the most commonly applied adsorbent types are activated carbons and zeolites [17,18,[20][21][22][23][24][25]. Activated carbons are well-studied adsorbent materials for CO 2 capture and are commonly applied because of their low price and easy availability.…”

Section: Introductionmentioning

confidence: 99%

“…Out of these six different zeolites, NaX and CaA were identified as the most promising adsorbents due to their high capacity for CO 2 uptake and their good CO 2 /CH 4 selectivity of 76 (NaX) and 74(CaA). In another study conducted by Montanari et al [23], the adsorption capacity of CO 2 and CH 4 on NaX was also tested and they rated the CH 4 adsorption as negligible.…”

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: Methodsmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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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“…2,47 Thus, these variations need to be taken into account in order to reproduce the adsorption of carbon dioxide when complexes are formed. A straight-forward approach consists on the modification of the partial charges of the atoms of the adsorbent that are directly involved in the formation of the complexes.…”

Section: Computational Detailsmentioning

confidence: 99%

“…Among porous solids, different materials have been extensively investigated for the adsorption and selective separation of carbon dioxide, being activated carbons and zeolites the most effective structures due to their thermal stability and large surface areas. [1][2][3] Zeolites are molecular sieves formed by TO 4 tetrahedra (T can be either Si or Al) that are connected to each other generating 3D structures with different topologies. The charge imbalance due to the presence of aluminum in the framework is compensated by extra framework cations.…”

Section: Introductionmentioning

confidence: 99%

Insights on the Anomalous Adsorption of Carbon Dioxide in LTA Zeolites

et al. 2014

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We use a combination of experiments and molecular simulations to address the discrepancies of the force fields available in the literature to accurately reproduce CO 2 adsorption in zeolites with high density of aluminum atoms and extra framework cations. We attribute these discrepancies to the fact that previous force fields are not parameterized to take into account the formation of carbonate-like complexes in these zeolites during CO 2 adsorption. Our data show that the formation of carbonate-like complexes has a marked effect on the accessible porous structure of the zeolite, and the strength is controlled by the density and nature of extra framework cations. Strong carbonate-like complexes are formed in zeolite topologies containing high density of sodium, whereas bivalent cations give rise to more labile complexes. We provide a new set of parameters capable to reproduce the experimental adsorption in these systems. Our approach consists on the modification of the partial charges of the atoms of the zeolite that are directly involved in the formation of the surface complexes (oxygen atoms and cations). The new set of charges combined with our previous transferable force field reproduces the experimental adsorption in structures containing carbon dioxide-cation complexes.

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