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Properties of active carbon with various particle shapes obtained in char-steam reaction Properties of active carbon with various particle shapes obtained in char-steam reaction

100%
Buczek B.
Chemical and Process Engineering
|
2012
|
vol. 33
|
issue 3
335-344
EN
The porous structure of cylindrical and ring-shaped char material was developed by partial steam gasification. Micropore and mesopore structures of active carbons with various forms of burn-off were evaluated by nitrogen adsorption/desorption isotherms. Parameters of the Dubinin- Radushkevich equation were calculated as well as the micropore size distribution by the Horvath- Kawazoe method. The results of textural investigations showed that more uniform micropore structure and better mechanical properties were found for ring-shaped active carbons.
2
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Purification of the used palm oil by adsorption

63%
Buczek B., Chwiałkowski W.
Polish Journal of Chemical Technology
|
2008
|
vol. 10
|
issue 1
19-21
EN
The components of fresh vegetable oils are mainly non-polar. During frying of food, complex and multistage reactions occur in the oil, which produce various polar compounds. Active carbons are characterized by small contents of polar functional groups, which are responsible for adsorbing such polar compounds. Effective purification of the used frying oils must involve the removal of the polar substances. To improve the quality of the used palm oil, an active carbon oxidized by a hydrogen peroxide treatment was used. Such a carbonaceous adsorbent improves the quality of the oil used for frying food by purifying it from colour substances, lipid hydrolysis products, oxidation products and total polar compounds.
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