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

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. Sistemas y métodos para recuperar hidrocarburos livianos a partir de gas residual de refinería usando un turboexpansor de sección final para generar una recuperación superior de los hidrocarburos livianos para uso como carga de alimentación petroquímica y para extraer los hidrocarburos livianos líquidos antes de ingresar en el turboexpansor.