An experimental adsorbent screening study for CO2 removal from N2

Harlick, P.J.E.; Tezel, F. Handan

doi:10.1016/j.micromeso.2004.07.035

Cited by 335 publications

(195 citation statements)

References 23 publications

Supporting

Mentioning

185

Contrasting

Unclassified

Order By: Relevance

“…Although dynamic separation capacity depends on experimental parameters such as f low rate and sample dimensions, Mg-MOF-74 is clearly a landmark among MOFs, with a separation capacity more than twice the nearest candidate and far milder regeneration conditions in breakthrough experiments run under similar conditions. NaX zeolite is among the most effective porous adsorbents considered for CO 2 separation (22,24). Breakthrough experiments performed on NaX under identical conditions to those performed on Mg-MOF-74 show that the MOF material, with dynamic capacity of 8.9 wt.…”

Section: Discussionmentioning

confidence: 96%

Highly efficient separation of carbon dioxide by a metal-organic framework replete with open metal sites

Britt

Furukawa

Wang

et al. 2009

Proc. Natl. Acad. Sci. U.S.A.

1,059

730

View full text Add to dashboard Cite

Selective capture of CO2, which is essential for natural gas purification and CO 2 sequestration, has been reported in zeolites, porous membranes, and amine solutions. However, all such systems require substantial energy input for release of captured CO2, leading to low energy efficiency and high cost. A new class of materials named metal-organic frameworks (MOFs) has also been demonstrated to take up voluminous amounts of CO 2. However, these studies have been largely limited to equilibrium uptake measurements, which are a poor predictor of separation ability, rather than the more industrially relevant kinetic (dynamic) capacity. Here carbon dioxide capture ͉ dynamic adsorption ͉ reticular chemistry S elective removal of CO 2 from gaseous mixtures is of paramount importance for the purification of fuel gases such as methane and acetylene and because of the imminent problem of anthropogenic CO 2 emissions. Effective systems for CO 2 removal must combine high selectivity and capacity with minimal energetic input to liberate the captured CO 2 . Materials presently used are amine solutions, zeolites, and porous membranes, but all fall short in one or more of these categories (1). To date, metal-organic frameworks (MOFs) have been shown to exhibit exceptional CO 2 storage capacity under equilibrium conditions where pure CO 2 is introduced into the pores (2-6). However, their capacities are dramatically reduced when exposed to mixtures of gases under dynamic conditions, as would be the case in power plant f lue gas and methane mining applications. A useful measure of dynamic separation capacity is obtained by exposing the material to mixed gas streams and detecting the appearance or ''breakthrough'' of CO 2 from the material. Here, we report that a MOF replete with open magnesium sites, Mg-MOF-74 [Mg 2 (DOT); DOT: 2,5-dioxidoterephthalate], has excellent selectivity, facile regeneration, and among the highest dynamic capacities reported for CO 2 in porous materials. Specifically, when Mg-MOF-74 is subjected to a gas stream containing 20% CO 2 in CH 4 , a percentage in the range relevant to industrial separations, it captures only CO 2 and not CH 4 . The pores retain 89 g of CO 2 per kilogram of material before breakthrough, a value higher than any other achieved in MOFs, and that rivals the highest capacities in zeolites. Remarkably, 87% of the captured CO 2 can be liberated at room temperature, and the remaining amount can be completely removed by mild heating (80°C). Based on this favorable performance, we assert that MOFs represent a competitive class of materials for efficient CO 2 capture, and that Mg-MOF-74 strikes the right balance between high capacity and heat of adsorption, notwithstanding the great opportunities available for functionalizing such MOFs for even further improved performance.In previous work, it has been shown that coordinatively unsaturated (open) metal sites in MOFs can be prepared by removal of coordinated solvent molecules (7,8). Whereas f lexible molecular or polymeric structures rearran...

show abstract

Section: Discussionmentioning

confidence: 96%

Highly efficient separation of carbon dioxide by a metal-organic framework replete with open metal sites

Britt

Furukawa

Wang

et al. 2009

Proc. Natl. Acad. Sci. U.S.A.

1,059

730

View full text Add to dashboard Cite

show abstract

“…Though various CO 2 capture technologies including physical absorption (Little et al, 1991;Chiesa and Consonni, 1999), chemical absorption (Bishnoi and Rochelle, 2000;Aroonwilas and Veawab, 2004;Rochelle, 2009), adsorption (Harlick and Tezel, 2004;Chang et al, 2009a), and membrane (Powell and Qiao, 2006) exist, they are not matured yet for post-combustion power plants. This is because that huge amount of flue gas is needed to treat and significant mass transfer limitations exist in the processes.…”

Section: Introductionmentioning

confidence: 99%

A Review of CO2 Capture by Absorption and Adsorption

Huang

Tan

2012

Aerosol Air Qual. Res.

1,457

875

View full text Add to dashboard Cite

Global warming resulting from the emission of greenhouse gases, especially CO 2 , has become a widespread concern in the recent years. Though various CO 2 capture technologies have been proposed, chemical absorption and adsorption are currently believed to be the most suitable ones for post-combustion power plants. The operation of the chemical absorption process is reviewed in this work, together with the use of absorbents, such as the ionic liquid, alkanolamines and their blended aqueous solutions. The major concerns for this technology, including CO 2 capture efficiency, absorption rate, energy required in regeneration, and volume of absorber, are addressed. For adsorption, in addition to physical adsorbents, various mesoporous solid adsorbents impregnated with polyamines and grafted with aminosilanes are reviewed in this work. The major concerns for selection of adsorbent, including cost, adsorption rate, CO 2 adsorption capacity, and thermal stability, are compared and discussed. More effective and less energy-consuming regeneration techniques for CO 2 -loaded adsorbents are also proposed. Future works for both absorption and adsorption are suggested.

show abstract

“…More recently in 2013, these authors pointed out that the adsorption of CO2 by non-functionalized porous carbons is mainly determined by the volume of the micropores with only a size below 0.8 nm (Sevilla et al, 2013). Some studies related to the study of inorganic materials as adsorbents suggested that pore sizes of 0.5 nm are the most adequate for CO2 adsorption (Harlick and Tezel, 2004;Saha et al, 2010). These discrepancies are responsible for the research effort driven on developing advanced carbon adsorbents with optimal porous size distributions to maximize CO2 uptake.…”

mentioning

confidence: 99%

Biomass Waste Carbon Materials as adsorbents for CO2 Capture under Post-Combustion Conditions

et al. 2016

View full text Add to dashboard Cite

A series of porous carbon materials obtained from biomass waste have been synthesized, with different morphologies and structural properties, and evaluated as potential adsorbents for CO2 capture in post-combustion conditions. These carbon materials present CO2 adsorption capacities, at 25°C and 101.3 kPa, comparable to those obtained by other complex carbon or inorganic materials. Furthermore, CO2 uptakes under these conditions can be well correlated with the narrow micropore volume, derived from the CO2 adsorption data at 0°C ( ) V CO 2 DR . In contrast, CO2 adsorption capacities at 25°C and 15 kPa are more related to only pores of sizes lower than 0.7 nm. The capacity values obtained in column adsorption experiments were really promising. An activated carbon fiber obtained from Alcell lignin, FCL, presented a capacity value of 1.3 mmol/g (5.7%wt). Moreover, the adsorption capacity of this carbon fiber was totally recovered in a very fast desorption cycle at the same operation temperature and total pressure and, therefore, without any additional energy requirement. Thus, these results suggest that the biomass waste used in this work could be successfully valorized as efficient CO2 adsorbent, under post-combustion conditions, showing excellent regeneration performance.

show abstract

An experimental adsorbent screening study for CO2 removal from N2

Cited by 335 publications

References 23 publications

Highly efficient separation of carbon dioxide by a metal-organic framework replete with open metal sites

Highly efficient separation of carbon dioxide by a metal-organic framework replete with open metal sites

A Review of CO2 Capture by Absorption and Adsorption

Biomass Waste Carbon Materials as adsorbents for CO2 Capture under Post-Combustion Conditions

Contact Info

Product

Resources

About