Formation of active carbons from cokes using potassium hydroxide

✍ Scribed by Harry Marsh; Denis S. Yan; Tom M. O'Grady; Arnold Wennerberg

• Publisher: Elsevier Science
• Year: 1984
• Tongue: English
• Weight: 919 KB
• Volume: 22
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(84)90096-4

✦ Synopsis

Petroleum cokes of different optical textures, a metallurgical coke and charcoals from wood were reacted with KOH in the temperature range 823-l 173 K. Resultant active carbons were examined by optical and scanning electron microscopy, by assessment of effective surface areas using N, and I, as adsorbates and by IR spectroscopy. Green cokes rather than calcined cokes, of optical texture of mosaics were most effective in formation of active carbons, S.A. = 2700 m2gg '. A ratio of KOH:C of 4: 1 was needed to obtain maximum surface areas at reaction temperatures < 1073 K with soak times > 1.25 hr. The wood-charcoals could be effectively activated. KOH was the most effective of the alkali salts in the production of active carbons.