Adsorption on activated carbon in countercurrent flow: An experimental study

✍ Scribed by Rolf Johansson; Ivars Neretnieks

• Publisher: Elsevier Science
• Year: 1980
• Tongue: English
• Weight: 788 KB
• Volume: 35
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(80)85087-1

✦ Synopsis

The work describes adsorpbon experiments from aqueous sotutlons on activated carbon usmg a counter-current adsorber Phenol and paramtrophenol were used for single component adsorption and molasses colour for multlcomponent adsorptIon expenments Isotherms were determmed usmg simple equdtbnum expenments Three different techmques were used for determmatlon of the kmetics These were fimte bath, mfirute bath and fixed bed experiments A mathematical model for countercurrent adsorptIon was tested The model mcludes the effect of film diffusion and pore dlffuslon as well as surface dlffuslon. and can handle systems with a nonlinear Isotherms Kmetic data m the form of an average dlffuslvlty m the carbon determmed from the fimte bath expenments and isotherm data did not predict the operation of the countercurrent column well Data from the fixed bed expenments predlcted countercurrent column operation much better Thus IS deemed to be due to mhomogeneities m the carbon used, resultrng m a fairly qmck mltlal uptake of the mam part of the solute and a slower uptake of a mmor amount