Low pressure biomethane gas adsorption by activated carbon

Koonaphapdeelert, Sirichai; Moran, James; Aggarangsi, Pruk; Bunkham, Asira

doi:10.1016/j.esd.2018.01.010

Cited by 22 publications

(14 citation statements)

References 17 publications

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“…It has a theoretical basis, whilst other models such as Toth (1995) [54] and Sips (1948) [55] are empirical. This model was initially developed for the low pressure region; nevertheless, it provides a reasonable estimation of the excess adsorption isotherms at higher pressures [17].…”

Section: Parametrization Of Excess Adsorption Isothermsmentioning

confidence: 99%

“…In this type of separation technology, the components of a gas mixture are separated by their molecular characteristics and affinity to an adsorbent material. For this purpose, a variety of materials have been studied including zeolites [7][8][9], carbon molecular sieves (CMS) [10][11][12], metal organic frameworks (MOFs) [13][14][15] and activated carbons (ACs) [16][17][18]. Among these materials, activated carbons present advantages in terms of: (i) hydrophobicity; thus, there is no need for a drying step before upgrading; (ii) low heat of adsorption, therefore a low energy of regeneration; (iii) the possibility of heteroatoms' functionalization to modify their adsorption behavior; and (iv) high CO 2 adsorption capacity at ambient pressure [19].…”

Section: Introductionmentioning

confidence: 99%

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CO2 and CH4 Adsorption Behavior of Biomass-Based Activated Carbons

et al. 2018

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The aim of the present work is to study the effect of different activation methods for the production of a biomass-based activated carbon on the CO 2 and CH 4 adsorption. The influence of the activation method on the adsorption uptake was studied using three activated carbons obtained by different activation methods (H 3 PO 4 chemical activation and H 2 O and CO 2 physical activation) of olive stones. Methane and carbon dioxide pure gas adsorption experiments were carried out at two working temperatures (303.15 and 323.15 K). The influence of the activation method on the adsorption uptake was studied in terms of both textural properties and surface chemistry. For the three adsorbents, the CO 2 adsorption was more important than that of CH 4 . The chemically-activated carbon presented a higher specific surface area and micropore volume, which led to a higher adsorption capacity of both CO 2 and CH 4 . For methane adsorption, the presence of mesopores facilitated the diffusion of the gas molecules into the micropores. In the case of carbon dioxide adsorption, the presence of more oxygen groups on the water vapor-activated carbon enhanced its adsorption capacity.

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Section: Parametrization Of Excess Adsorption Isothermsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

CO2 and CH4 Adsorption Behavior of Biomass-Based Activated Carbons

et al. 2018

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“…There are many mineral sources and agricultural wastes that can be used as the precursor of adsorbent such as coal [15,16], olive and cherry stones [17], coconut shell [18], corn cobs [19], almond shell [20,21], palm shell [22][23][24], rice husk [25], and walnut shell, which are rich sources of carbon. Walnut shell is one of the activated carbon precursors, which is a low-cost and renewable material [26].…”

Section: Introductionmentioning

confidence: 99%

Activated Nanoporous Carbon from walnut shell as a Promising Adsorbent for Methane Storage in ANG Technology

Nouralishahi

Bahaeddini

Rashidi³

et al. 2019

Scientia Iranica

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Activated carbon from walnut shell is studied for methane storage in this research. The samples are synthesized by zinc chloride and phosphoric acid as activating agents. The e ect of physical activation, after chemical activation steps, on the nal structure of the samples and their total methane storage is examined. The results show that physical activation has an improving e ect on the total capacity of the samples activated by phosphoric acid; however, it has the opposite e ect on the capacity of the samples activated by zinc chloride. The experimental data show that the best capacity is obtained at impregnation ratios of 0.7 and 1.2 in the case of phosphoric acid and zinc chloride activated samples, respectively. The best sample is the one activated by phosphoric acid with an impregnation ratio of 0.7 and, subsequently, physically activated by carbon dioxide. It has a BET surface area of 1479 m 2 /g, an average pore diameter of 4.2 nm, the total pore volume of 0.84 cm 3 /g, and the methane adsorption capacity of 159 cm 3 /g. The sample shows high stability during successive adsorption/desorption cycles experiment.

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“…The Langmuir model has the advantage of taking into account the volume of the adsorbed phase it also has a theoretical basis with other models such as Toth and Sips being empirical. Initially developed for low pressures conditions, the Langmuir model can provide a reasonable approximation of the excess adsorption isotherms at higher pressures [17].…”

Section: Parametrization Of Excess Adsorption Isothermsmentioning

confidence: 99%

“…On this type of separation technology, the components of a gas mixture are separated based on their molecular characteristics and affinity to an adsorbent material. For this purpose, a variety of materials have been studied including zeolites [7][8][9], carbon molecular sieves (CMS) [10][11][12], metal organic frameworks (MOFs) [13][14][15] and activated carbons (AC) [16][17][18].Among this materials, activated carbons present advantages in terms of (i) hydrophobicity, no need of water removal step before upgrading, (ii) low heat of adsorption, low energy of regeneration, (iii) possibility of heteroatoms functionalization to modify their adsorption behavior and (iv) high CO 2 adsorption capacity at ambient pressure [19]. Furthermore, activated carbons can be produced with a lower cost than other adsorbents, with a wide range of available precursor material.…”

Section: Of 10mentioning

confidence: 99%

CO2 and CH4 Adsorption Behavior of Biomass Based Activated Carbons

Peredo-Mancilla¹,

Ghouma²,

Hort³

et al. 2018

Preprint

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Abstract:The aim of the present study is to provide new insights into the CO 2 and CH 4 adsorption using a set of biomass-based activated carbons obtained by physical and chemical activation of olive-stones. The adsorption behavior is analyzed by means of pure gas adsorption isotherms up to 3.2 MPa at two temperatures (303.15 and 323.15 K).The influence of the activation method on the adsorption uptake is studied in terms of both textural properties and surface chemistry. For three activated carbons the CO 2 adsorption was more important than that of CH 4 . The chemically activation resulted in higher BET surface area and micropore volume that lead to higher adsorption for both CO 2 and CH 4 . For methane the presence of mesopores seems to facilitate the access of the gas molecules into the micropores while for carbon dioxide, the presence of oxygen groups enhanced the adsorption capacity.

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Low pressure biomethane gas adsorption by activated carbon

Cited by 22 publications

References 17 publications

CO2 and CH4 Adsorption Behavior of Biomass-Based Activated Carbons

CO2 and CH4 Adsorption Behavior of Biomass-Based Activated Carbons

Activated Nanoporous Carbon from walnut shell as a Promising Adsorbent for Methane Storage in ANG Technology

CO2 and CH4 Adsorption Behavior of Biomass Based Activated Carbons

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