| 초록 |
Adsorption of Volatile Organic Compounds (VOCs) from air has been studied for a long time since VOCs have been known as a major contributor to photochemical smog, which can cause haze, damage to plant and animal life, and eye irritation and respiratory problem for humans. VOCs are used as solvents in manufacturing conuntless products (ex, crystallized organic chemicals, printed materials, paints and coatings, and dry-cleaning fluids). One consequence of these manufacturing operations is that large amounts of organics are being emitted to the atmosphere each year. Therefore, VOCs are among the most common pollutants emitted by chemical process industries. Accordingly, VOC emission control is a major portion of environmental activities. Therefore the proper recovery of volatile solvent vapors from industries has multiple purposes such as reduction of production cost, energy saving, and environmental protection. In Korea, about 1000 tons of various solvents in a year have been used in many industrial processes as polyethylene coating and cleaning agents. The emissions from some industries contain BTX, MEK, and other valuable solvents which should be recovered to reduce production cost and air contamination. The primary objectives of the present work are the recovery of a solvent vapor by a adsorption process and the theoretical analysis of adsorption bed dynamics based on a mathematical model. The purpose of the present work is to obtain the pertinent adsorption and desorption data and to develop a mathematical model for the calculation of a non-isothermal adsorption process. An activated carbon, MS-13X (sphere, pellet), a silica gel, MS-4A, a polymeric resin (SP850) were used as adsorbents and a volatile organic compound, MEK, was chosen as a solvent.
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