Preparation of biomass-based activated carbons and their evaluation for biogas upgrading purposes

Vilella, Priscila Costa; Lira, Jéssyca Alves; Azevedo, Diana C. S.; Bastos‐Neto, Moises; Stefanutti, Ronaldo

doi:10.1016/j.indcrop.2017.08.017

Cited by 68 publications

(28 citation statements)

References 42 publications

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“…The occurrence of a hysteresis loop at P / P 0 = 0.45–1 indicates the existence of mesopores (Fig. (a)) . The hysteresis loop of wood‐CF‐Ag shows that this sample had a smaller area than wood‐CF, implying a reduction of the mesopore structures, which is attributed to Ag particles forming on the surface of wood‐CF that blocked the pores and decreased the porosity of wood‐CF‐Ag.…”

Section: Resultsmentioning

confidence: 95%

“…7(a)). 27 The hysteresis loop of wood-CF-Ag shows that this sample had a smaller area than wood-CF, implying a reduction of the mesopore structures, which is attributed to Ag particles forming on the surface of wood-CF that blocked the pores and decreased the porosity of wood-CF-Ag. In comparison with wood-CF-Ag, wood-Ag-CF had higher nitrogen adsorption and larger hysteresis loop area, indicating an increase in porosity caused by the reverse order of Ag loading and carbonization.…”

Section: Bet Analysismentioning

confidence: 90%

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Silver‐doped carbon fibers at low loading capacity that display high antibacterial properties

Zhang

Chen

Sun

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND Renewable resources have been considered for producing many advanced materials. In this respect, silver‐doped carbon‐based materials with a low loading capacity and high antibacterial activity can also be generated via environmentally friendly routes and from renewable resources. RESULTS Silver‐doped carbon fibers were prepared from wood and cotton fibers via complexation and reduction reactions for depositing silver on the fibers and subsequently via carbonization of the loaded fibers. Silver loading before carbonization enhanced the stability of silver on the carbonized fibers, decreased silver loss (from 30 to 12%) and lowered the silver loading (5.66%) needed to achieve excellent antibacterial activity. However, wood‐based silver‐doped carbon fibers performed better than cotton‐based carbon fibers with respect to loss of antibacterial activity (12% at a silver loading of 5.66% versus 24% at a silver loading of 7.97% in 800 h respectively). These results are attributed to more uniformity in the distribution of silver nanoparticles in the porous structure of wood fibers than in cotton fibers. CONCLUSION The wood‐based carbon fibers exhibited better antibacterial activity and stronger affinity for maintaining silver and lower required silver loadings, and the sequence of silver loading and carbonization was crucial in developing silver‐loaded carbon fibers with good antibacterial performance. © 2019 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 95%

Section: Bet Analysismentioning

confidence: 90%

Silver‐doped carbon fibers at low loading capacity that display high antibacterial properties

Zhang

Chen

Sun

et al. 2019

J of Chemical Tech & Biotech

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“…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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“…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]. Furthermore, activated carbons can be produced with a lower cost than other adsorbents, with a wide range of available precursor materials.…”

Section: Introductionmentioning

confidence: 99%

“…This waste-valorization process reduces the environmental and economic costs associated with the precursors while eliminating the need for disposal or incineration of unwanted agricultural by-products [24]. Materials such as corn cobs, palm shells, starch, coconut shells, durian shell, olive stones and bamboo have already been studied for activated carbon production [19,[25][26][27][28][29][30][31][32]. In particular, olive stones are seen as suitable precursors, giving activated carbon with high adsorption capacities, important mechanical strength and low ash content [29,33].…”

Section: Introductionmentioning

confidence: 99%

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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Preparation of biomass-based activated carbons and their evaluation for biogas upgrading purposes

Cited by 68 publications

References 42 publications

Silver‐doped carbon fibers at low loading capacity that display high antibacterial properties

Silver‐doped carbon fibers at low loading capacity that display high antibacterial properties

CO2 and CH4 Adsorption Behavior of Biomass Based Activated Carbons

CO2 and CH4 Adsorption Behavior of Biomass-Based Activated Carbons

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