从大量气体或空气中捕获低浓度溶剂的传统工业实践包括将气体吹过一组包含吸附活性颗粒炭层的大型容器。由于碳和溶剂都相对昂贵，而且溶剂通常高度易燃，一次性使用和处置是不经济的。因此，有必要再生碳的吸附能力并回收溶剂。传统的回收/再生实践包括将“最古老”的碳层与气流隔离，并在大约1磅表压下用低压蒸汽将其蒸汽化。因此，溶剂被蒸汽从碳的孔隙中驱离。在蒸汽循环结束时，通过床层的反向气流既可以冷却床层，又可以使其干燥以供再次使用。 对于溶剂回收，离开床层的混合蒸汽被完全冷凝并过冷至约100华氏度，这样两种产生的不混溶液体可以在一个传统上称为“倾析器”的沉降容器中进行重量分析分离这种传统方案会消耗大量能源。单位:双引文:研讨会，ASHRAE交易，1987年，第93卷，第。1，纽约州纽约市

The conventional industrial practice for capturing solvents contained in low concentrations from large volumes of gas or air consists of blowing the gas through a battery of large vessels containing beds of adsorptive activated granular carbon.Since both the carbon and the solvent are relatively costly and the solvent is usually highly flammable, one-time use and disposal is uneconomical. It is, therefore, necessary to regenerate the carbon’s adsorptive power and recover the solvent. Conventional practice of recovery/regeneration consists of isolating the "oldest" of the carbon beds from the gas stream and steaming it with low-pressure steam at about one pound gauge pressure. Thus the solvent is driven off by the steam displacing the solvent from the pores of the carbon. At the end of the steaming cycle, reverse gas flow through the bed both cools and dries it for reuse. For solvent recovery, the mixed vapors leaving the bed are totally condensed and subcooled to about 100 F so that the two resulting immiscible liquids can be gravimetrically separated in a settling vessel conventionally called a "decanter." This conventional scheme results in the consumption of considerable quantities of energy.Units: Dual