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Activated carbon from Eucalyptus camaldulensis Dehn bark using phosphoric acid activation

Author:
Patnukao, Phussadee, Pavasant, Prasert
Source:
Bioresource technology 2008 v.99 no.17 pp. 8540-8543
ISSN:
0960-8524
Subject:
Eucalyptus camaldulensis, activated carbon, adsorption, ash content, bark, bulk density, iodine, methylene blue, phosphoric acid, raw materials, surface area, temperature
Abstract:
The powdered activated carbon prepared by phosphoric acid activation was significantly affected by the carbonization temperature and the weight ratio between raw material and phosphoric acid. With an activation time of 1h and an impregnation ratio of 1:1, the activated carbons with better adsorption capacity were obtained at 500°C. A reduction in the adsorption capacity of the carbon product at higher acid content than this was observed, possibly due to the collapse of the micropore structure. The properties of the resulting activated carbon were: bulk density 0.251gcm⁻³, ash content 4.88%, yield 26.2%, iodine adsorption 1043mgg⁻¹, methylene blue adsorption number 427mgg⁻¹, and BET surface area 1239m² g⁻¹.
Agid:
581504