PROCESS FOR TREATING VOLATILE ORGANIC COMPOUNDS IN A GAS STREAM

摘要

A process for treating volatile organic compounds known as VOCs, carried in a gaseous process medium from an industrial process plant (11) includes the steps of concentrating the VOCs in gaseous medium by an adsorption/desorption process and supply the thus concentrated VOC to a combustion engine (14) as a fuel for the engine. Two or more adsorption desorption units (22, 23) are provided whereby adsorption of VOCs in one of said units is decoupled from desorption of VOCs for combustion from another of said units. In this way the rates of adsorption and desorption can be controlled independently. Similarly desorption need not necessarily take place at the same time as adsorption and thus need not necessarily take place at the same time as process plant operation.