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Regeneration of activated carbons used in waste‐water treatment by a moving‐bed regenerator
Author(s) -
Hashimoto Kenji,
Miura Kouichi,
Kyotani Susumu
Publication year - 1985
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690311208
Subject(s) - regenerative heat exchanger , activated carbon , flow (mathematics) , mechanics , carbon fibers , materials science , packed bed , adsorption , heat transfer , mass transfer , plug flow , chemical engineering , waste management , thermodynamics , chemistry , heat exchanger , composite material , engineering , physics , organic chemistry , composite number
A method was developed for calculating the distributions of weight loss and temperature of spent activated carbon in a moving‐bed regenerator in which the solid flow was regarded as being plug flow. A kinetic model developed earlier, which was based on regeneration consisting of many first‐order reactions each with different frequency factors and different activation energies, was successfully applied to a design method for the regenerator. The flow pattern of the solid particles and heat transfer characteristics in a small moving bed were clarified experimentally, and the information obtained was used to calculate the distributions of weight loss of the spent carbon and temperature in the moving‐bed regenerator by means of the design method. The calculated results were in fairly good agreement with the experimental data obtained in a small moving‐bed regenerator. The adsorption capacity of the regenerated carbon was comparable to or greater than that of the virigin carbon.