SO<sub>2</sub> Physisorption on Exfoliated Graphite

Llanos, J.L.; Fertitta, Abel E.; Flores, Ethel S. E.; Bottani, E. J.

doi:10.1021/jp0273981

Cited by 14 publications

(7 citation statements)

References 24 publications

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“…In addition, these methods suffer from a substantial cost of use and recovery . Therefore, the progress of new and emerging adsorbent materials for the capture of SO 2 , in high amounts, via physisorption processes is rapidly growing. − For example, zeolites have been proposed for this task, since they have basic oxygen atoms on the surface affording good candidates for SO 2 capture. , However, the regeneration process involves heating up to 450 °C, or even higher temperatures, or employing chemical treatments such as H 2 O 2 , leading to a structural transformation and a loss in porosity.…”

Section: Introductionmentioning

confidence: 99%

Functionalized NU-1000 with an Iridium Organometallic Fragment: SO₂ Capture Enhancement

Gorla

Díaz-Ramírez

Abeynayake

et al. 2020

ACS Appl. Mater. Interfaces

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A new material, MOF-type [Ir]@NU-1000, was accessed from the incorporation of the iridium organometallic fragment [Ir{κ3(P,Si,Si)PhP(o-C6H4CH2Si i Pr2)2}] into NU-1000. The new material incorporates less than 1 wt % of Ir(III) (molar ratio Ir to NU-1000, 1:11), but the heat of adsorption for SO2 is significantly enhanced with respect to that of NU-1000. Being a highly promising adsorbent for SO2 capture, [Ir]@NU-1000 combines exceptional SO2 uptake at room temperature and outstanding cyclability. Additionally, it is stable and can be regenerated after SO2 desorption at low temperature.

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Section: Introductionmentioning

confidence: 99%

Functionalized NU-1000 with an Iridium Organometallic Fragment: SO₂ Capture Enhancement

Gorla

Díaz-Ramírez

Abeynayake

et al. 2020

ACS Appl. Mater. Interfaces

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“…During recent times, many porous materials have been synthesized and modeled to study their capability to capture SO 2 and CO 2 from the flue gas. − Among these materials, carbon-based adsorbents such as activated carbon, graphene, carbon nanotube, graphite are extensively used and found to be most prominent in gas separation at postcombustion conditions. Apart from carbon materials having well-defined pore size and structures such as activated carbons, covalent organic frameworks, graphene, and carbon nanotubes, ,, a plethora of amorphous carbon exists in a wide range of density which is equally important for gas separation.…”

Section: Introductionmentioning

confidence: 99%

Treatment of Flue Gas using Graphene Sponge: A Simulation Study

Maurya

Singh

2018

J. Phys. Chem. C

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Grand canonical Monte Carlo simulations are conducted to investigate the adsorption ability of a 3-D graphene sponge (GS) to separate acidic gases from flue gas stream. To assess the adsorption capacity of GS, first, adsorption of pure component flue gas is studied at a temperature of 303 K and varying pressure up to 2.5 bar. Subsequently, the adsorption capacity and selectivity of GS are investigated for a ternary mixture (CO 2 /SO 2 /N 2 ) of flue gas under the same conditions. This study shows that the maximum adsorption capacity of GS for pure component flue gas is observed for SO 2 followed by CO 2 and N 2 . The adsorption uptake decreases with an increase in pore size of GS. At 1 bar, the amount of adsorption of SO 2 and CO 2 are ∼13 mmol/g and ∼2.6 mmol/g, respectively. Upon increasing the average pore size to 20 Å, the excess amount decreases by 56% and 58% for SO 2 and CO 2 , respectively. The adsorption capacities of GS for CO 2 and SO 2 are better than other carbonbased adsorbents except for CNT bundles. In the case of a ternary mixture of N 2 , CO 2 , and SO 2 in the mole ratios of 0.8, 0.15, and 0.05, we found that the adsorption behavior follows the same order as in the pure component flue gas adsorption. However, the adsorption amount decreases significantly from that of pure component adsorption amount in GS. The adsorption amount of SO 2 and CO 2 at postcombustion conditions decreases to 1.3 mmol/g and 0.5 mmol/g, respectively, which further decreases upon increasing the average pore size. Selectivity analysis of adsorption shows that the adsorption selectivity of SO 2 over N 2 is the maximum followed by the selectivity of CO 2 over N 2 and SO 2 over CO 2 . Both selectivity and uptake capacity decreases with increase in average pore size of GS.

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“…Examples of adsorbents include activated carbons, [1][2][3][4][5][6][7][8][9] activated carbon fibers, 10-13 fly ash, 14 sewage sludge derived materials, 15 porous adsorbents of inorganic origin with basic properties, [16][17][18][19][20] and exfoliated graphite. 21 Removal of SO 2 is important from both environmental (acid rain) and respiratory protection aspects. For the latter, filters being able to remove simultaneously species of different chemistries are in demand.…”

Section: Introductionmentioning

confidence: 99%

Effects of Surface Features on Adsorption of SO₂ on Graphite Oxide/Zr(OH)₄ Composites

Seredych

Bandosz

2010

J. Phys. Chem. C

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Zirconium hydroxide/graphene composites were synthesized from zirconium chloride and graphite oxide with the content of the graphene component between 5 and 50%. They were used as adsorbents of sulfur dioxide at ambient conditions. The initial and exhausted materials were characterized using adsorption of nitrogen, infrared spectroscopy, potentiometric titration, scanning electron microscopy and thermal analysis. The results indicated enhanced adsorption of SO2 on the composites, which is linked to the formation of new basic sites and porosity as a result of interactions between zirconium hydroxide units and the oxygen groups attached to the graphene layers. Both physical adsorption and reactive adsorption of SO2 via formation of sulfites play a role in the retention process. The graphene component catalyzes oxidation of SO2 and leads to the formation of sulfates.

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SO₂ Physisorption on Exfoliated Graphite

Cited by 14 publications

References 24 publications

Functionalized NU-1000 with an Iridium Organometallic Fragment: SO₂ Capture Enhancement

Functionalized NU-1000 with an Iridium Organometallic Fragment: SO₂ Capture Enhancement

Treatment of Flue Gas using Graphene Sponge: A Simulation Study

Effects of Surface Features on Adsorption of SO₂ on Graphite Oxide/Zr(OH)₄ Composites

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SO2 Physisorption on Exfoliated Graphite

Cited by 14 publications

References 24 publications

Functionalized NU-1000 with an Iridium Organometallic Fragment: SO2 Capture Enhancement

Functionalized NU-1000 with an Iridium Organometallic Fragment: SO2 Capture Enhancement

Treatment of Flue Gas using Graphene Sponge: A Simulation Study

Effects of Surface Features on Adsorption of SO2 on Graphite Oxide/Zr(OH)4 Composites

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Product

Resources

About

SO₂ Physisorption on Exfoliated Graphite

Functionalized NU-1000 with an Iridium Organometallic Fragment: SO₂ Capture Enhancement

Functionalized NU-1000 with an Iridium Organometallic Fragment: SO₂ Capture Enhancement

Effects of Surface Features on Adsorption of SO₂ on Graphite Oxide/Zr(OH)₄ Composites