The effect of commercial carbon de-ashing on its thermal stability and porosity

✍ Scribed by G Rychlicki; A P Terzyk; W Majchrzycki

• Publisher: Wiley (John Wiley & Sons)
• Year: 1999
• Tongue: English
• Weight: 206 KB
• Volume: 74
• Category: Article
• ISSN: 0268-2575
• DOI: 10.1002/(sici)1097-4660(199904)74:4<329::aid-jctb36>3.0.co;2-y

✦ Synopsis

The inýuence of Korver's de-ashing procedure on the changes in the thermal stability and porosity of three commercial granular activated carbons : D43/1 (Carbo-Tech, Essen, Germany), AHD, and WD-extra (Hajno wka, Poland) was investigated. For original carbons, carbons treated only with concentrated HCl, and completely de-ashed carbons (treated with concentrated HCl and HF) the thermogravimetric results in air and helium, apparent and true densities, low-temperature nitrogen adsorption, and mercury porosimetry are reported and compared. The changes in thermal stability and porosity are discussed together with the mechanism of carbon de-ashing.