SYSTEMS AND METHODS FOR RECOVERING DESIRED LIGHT HYDROCARBONS FROM REFINERY WASTE GAS USING A BACK-END TURBOEXPANDER

摘要

Systems and methods for recovering light hydrocarbons from refinery waste gas using a back-end turboexpander to generate a higher recovery of the light hydrocarbons for use as petrochemical feedstock and to remove the liquid light hydrocarbons before entering the turboexpander. The present disclosure overcomes one or more deficiencies in the prior art by providing systems and methods for recovering the desired light hydrocarbons from refinery waste gas using a back-end turboexpander to generate a higher recovery of the desired light hydrocarbons for use as petrochemical feedstock and to reduce the extent of the heavy hydrocarbons entering the turboexpander.