Heat and Mass Transfer Mechanisms during Steam Desorption Process in an Activated Carbon Packed Column

摘要

Activated carbon columns are often used for the purification of indoor air contaminated with solvent vapours. The regeneration of the used activated carbon is practically conducted with steam, which is followed with a drying/cooling process to dry and to cool down the column, as cold and dry carbon is essential for the adsorption process. A Double-Two-Mechanism-Model was proposed to reveal the mechanisms happening during the steaming process that has been a less understood but important step in the adsorption cycles. Experiments in a pilot-scale adsorber showed clear evidences to support this theory.