Effect of pyrolysis temperature and thermal oxidation on the adsorption properties of carbon cryogels

Hotová, Gabriela; Slovák, Václav

doi:10.1016/j.tca.2015.06.001

Cited by 8 publications

(2 citation statements)

References 26 publications

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“…The Quercus ilex L. biochar was purchased from Piroeco Bioenergy, S.L., Málaga, Spain and designated as QB500. Many studies have reported higher pyrolysis temperature results in higher sorption capacities (Hotová and Slovák 2015). On the other hand, Intani et al (2018) recommended optimal pyrolysis at 588.42 °C for maize cob biochar.…”

Section: Methodsmentioning

confidence: 99%

Influence of pyrolysis temperature and feedstock biomass on Cu2+, Pb2+, and Zn2+ sorption capacity of biochar

Geleto

Forján

Arco-Lázaro

et al. 2022

Int. J. Environ. Sci. Technol.

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Biochar has attracted significantly growing attention due to its effectiveness in terms of both cost and environmental safety in removing trace metals from soil and water. Its metal sorption capacity depends on its properties, which are in turn governed by pyrolysis temperature and type of biomass. Therefore, this study examines the role of pyrolysis temperature and biomass in biochars sorption capacity of Pb2+, Cu2+ and Zn2+. Biochars produced by pyrolysis of maize (Zea mays L.) cobs at different temperatures were used to assess the effect of temperature, whereas evergreen oak (Quercus ilex L.) pyrolyzed at 500 °C was used to assess the effect of biomass. Sorption isotherms were constructed by batch method and compared with Langmuir and Freundlich models. Most of the sorption isotherms displayed irregular curves and not all of the isotherms fitted the models. Therefore, sorption distribution coefficients and metal removal percentages were used to determine sorption capacities biochars for studied metals. Accordingly, Quercus ilex L. was most effective in sorbing all studied metals, which indicates the role of biomass. The maize biochar pyrolyzed at 500 °C was most effective among maize cob biochars, which revealed the influence pyrolysis temperature. The concentrations of added sorption solutions also played significant role in sorption, and consequently biochar pyrolyzed 350 °C was least effective. The targeted metals also affected the sorption as they compete for sorption sites. Thus, their selective sequence was in the order of Pb2+ ˃ Cu2+ ˃ Zn2+.

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Section: Methodsmentioning

confidence: 99%

Influence of pyrolysis temperature and feedstock biomass on Cu2+, Pb2+, and Zn2+ sorption capacity of biochar

Geleto

Forján

Arco-Lázaro

et al. 2022

Int. J. Environ. Sci. Technol.

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show abstract

“…In general, partial oxidation or oxidation and cracking reactions of the bio-oil molecules occur with increasing temperatures during the pyrolysis process [20] , leading to pyrolytic oils (PO) with high carboxylic acid contents and high acid values (AV) ranging from 17 to 142 [21][22] . These undesirable products have a large effect on the corrosion value, cold filter plugging point and freezing point of the biofuel.…”

Section: Introductionmentioning

confidence: 99%

Low acid value bio-gasoline and bio-diesel made from waste cooking oils using a fast pyrolysis process

Chang

Cheng

Ling

et al. 2017

Journal of the Taiwan Institute of Chemical Engineers

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Porous Carbon and Carbon‐based Materials via Ice Templating and Freeze‐drying

2018

Ice Templating and Freeze‐Drying for Porous Materials and Their Applications

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Effect of pyrolysis temperature and thermal oxidation on the adsorption properties of carbon cryogels

Cited by 8 publications

References 26 publications

Influence of pyrolysis temperature and feedstock biomass on Cu2+, Pb2+, and Zn2+ sorption capacity of biochar

Influence of pyrolysis temperature and feedstock biomass on Cu2+, Pb2+, and Zn2+ sorption capacity of biochar

Low acid value bio-gasoline and bio-diesel made from waste cooking oils using a fast pyrolysis process

Porous Carbon and Carbon‐based Materials via Ice Templating and Freeze‐drying

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