Porous properties of activated carbon produced from Eucalyptus and Wattle wood by carbon dioxide activation

Ngernyen, Yuvarat; Tangsathitkulchai, Chaiyot; Tangsathitkulchai, M.

doi:10.1007/s11814-006-0028-9

Cited by 49 publications

(32 citation statements)

References 28 publications

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“…S1, ESI †), but no differences in color were observed between the different activation conditions. 15,16,23 Hickory and peanut hull AHC surface areas varied from 441-928 m 2 g À1 and from 309-1308 m 2 g À1 , respectively. Peanut hull has a lignin content of 28%, compared to 18% for hickory.…”

Section: Physicochemical Characteristicsmentioning

confidence: 99%

“…Hydrochars oen have high VOC contents that may not be removed through washing. [15][16][17][18] While several studies have examined the sorptive properties of hydrochar and activated hydrochars (AHCs) for various contaminants, 19,20 few have examined the effects of activation conditions on AHC physicochemical properties and its resulting sorption ability. In addition, the low ash content of hydrochar makes it a more attractive option for activation than char created through dry pyrolysis.…”

Section: Introductionmentioning

confidence: 99%

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Physically (CO₂) activated hydrochars from hickory and peanut hull: preparation, characterization, and sorption of methylene blue, lead, copper, and cadmium

et al. 2016

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The effects of CO 2 activation temperature (600-900 C) and time (1 and 2 h) on the physicochemical and sorptive characteristics of hickory and peanut hull hydrochars were investigated. The extent of burn-off increased with increasing activation times and temperatures, and ranged from 34-54% and 28-50% for activated hydrochars (AHCs), respectively. The surface area and pore volume of the AHCs also increased with activation time and temperature and were much higher than those of their corresponding nonactivated parent hydrochars. In general, the physical activation improved the ability of all AHCs to sorb methylene blue, lead (Pb 2+ ), copper (Cu 2+ ), and cadmium (Cd 2+ ) from aqueous solutions. AHCs created at 900 C had the best sorption ability, and the highest sorption rate was usually observed in 900 C 2 h AHCs. The sorption of methylene blue and the three heavy metals was strongly correlated with AHC surface area, suggesting that the adsorption occurred via site-specific interactions.

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Section: Physicochemical Characteristicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Physically (CO₂) activated hydrochars from hickory and peanut hull: preparation, characterization, and sorption of methylene blue, lead, copper, and cadmium

et al. 2016

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“…Therefore, attention has been paid to the production of scalable high surface area nanoporous carbon materials, particularly in a cost effective way from agricultural by-products or wastes. Wide varieties of carbonaceous precursor materials including pitch [21], pistachio shell [22], rice husks [23,24], coconut shell [25], eucalyptus wood [26], firewood [27,28], oil-palm shell [29,30], babassu [31], corncob [32], bamboo [33,34], etc. have been used to prepare activated carbons.…”

Section: Introductionmentioning

confidence: 99%

Rice Husk-Derived High Surface Area Nanoporous Carbon Materials with Excellent Iodine and Methylene Blue Adsorption Properties

Shrestha

Thapa

Shrestha

et al. 2019

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Iodine and methylene blue adsorption properties of the high surface area nanoporous carbon materials derived from agro-waste and rice husk is reported. Rice husk was pre-carbonized at 300 °C in air followed by leaching out the silica nanoparticles by extraction with sodium hydroxide solution. The silica-free rice husk char was mixed with chemical activating agents sodium hydroxide (NaOH), zinc chloride (ZnCl2), and potassium hydroxide (KOH) separately at a mixing ratio of 1:1 (wt%) and carbonized at 900 °C under a constant flow of nitrogen. The prepared carbon materials were characterized by scanning electron microscopy (SEM), Fourier transformed-infrared spectroscopy (FT-IR), powder X-ray diffraction (pXRD), and Raman scattering. Due to the presence of bimodal micro- and mesopore structures, KOH activated samples showed high specific surface area ca. 2342 m2/g and large pore volume ca. 2.94 cm3/g. Oxygenated surface functional groups (hydroxyl, carbonyl, and carboxyl) were commonly observed in all of the samples and were essentially non-crystalline porous particle size of different sizes (<200 μm). Adsorption study revealed that KOH activated samples could be excellent material for the iodine and methylene blue adsorption from aqueous phase. Iodine and methylene blue number were ca. 1726 mg/g and 608 mg/g, respectively. The observed excellent iodine and methylene blue adsorption properties can be attributed to the well-developed micro- and mesopore structure in the carbon material. This study demonstrates that the agricultural waste, rice husk, and derived nanoporous carbon materials would be excellent adsorbent materials in water purifications.

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“…Eucalyptus wood was used as a starting precursor, for activated carbons with varied porous properties from low to relatively high surface area can be conveniently produced from this type of material [29][30][31]. In addition, activated carbons prepared by physical activation having different surface area and porosity were oxidized to investigate the influence of porous structure on the quantity and distribution of the introduced surface September, 2009 functional groups.…”

Section: Introductionmentioning

confidence: 99%

Surface modification and adsorption of eucalyptus wood-based activated carbons: Effects of oxidation treatment, carbon porous structure and activation method

Tangsathitkulchai

Ngernyen

Tangsathitkulchai

2009

Korean J. Chem. Eng.

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The incorporation of oxygen functional groups onto the surface of eucalyptus activated carbon and its surface chemistry were investigated as a function of oxidation conditions, carbon porous properties and carbon preparation method. Under all treatment conditions of increasing time, temperature and oxidant concentration, liquid oxidation with HNO 3 , H 2 O 2 and (NH 4 ) 2 S 2 O 8 and air oxidation led to the increase of acidic group concentration, with carboxylic acid showing the largest percentage increase and air oxidation at the maximum allowable temperature of 350 o C produced the maximum content of both carboxylic acid and total acidic group. Nitric acid oxidation of chemically activated carbon produced higher total acidic content but a lower amount of carboxylic acid compared to the oxidized carbon from physical activation. The increased contents of acidic groups on oxidized carbons greatly enhanced the adsorption capacity of water vapor and heavy metal ions.

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Porous properties of activated carbon produced from Eucalyptus and Wattle wood by carbon dioxide activation

Cited by 49 publications

References 28 publications

Physically (CO₂) activated hydrochars from hickory and peanut hull: preparation, characterization, and sorption of methylene blue, lead, copper, and cadmium

Physically (CO₂) activated hydrochars from hickory and peanut hull: preparation, characterization, and sorption of methylene blue, lead, copper, and cadmium

Rice Husk-Derived High Surface Area Nanoporous Carbon Materials with Excellent Iodine and Methylene Blue Adsorption Properties

Surface modification and adsorption of eucalyptus wood-based activated carbons: Effects of oxidation treatment, carbon porous structure and activation method

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Porous properties of activated carbon produced from Eucalyptus and Wattle wood by carbon dioxide activation

Cited by 49 publications

References 28 publications

Physically (CO2) activated hydrochars from hickory and peanut hull: preparation, characterization, and sorption of methylene blue, lead, copper, and cadmium

Physically (CO2) activated hydrochars from hickory and peanut hull: preparation, characterization, and sorption of methylene blue, lead, copper, and cadmium

Rice Husk-Derived High Surface Area Nanoporous Carbon Materials with Excellent Iodine and Methylene Blue Adsorption Properties

Surface modification and adsorption of eucalyptus wood-based activated carbons: Effects of oxidation treatment, carbon porous structure and activation method

Contact Info

Product

Resources

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Physically (CO₂) activated hydrochars from hickory and peanut hull: preparation, characterization, and sorption of methylene blue, lead, copper, and cadmium

Physically (CO₂) activated hydrochars from hickory and peanut hull: preparation, characterization, and sorption of methylene blue, lead, copper, and cadmium