método para remoçaõ de um contaminante menos volátil de uma corrente refrigerante de um sistema de refrigeração de ciclo de brayton reverso, sistema para remoçaõ de um contaminante, e método para liquefação uma corrente de gás natural

摘要

A system and method for removal of a contaminant comprising removing a liquefied portion of a refrigerant stream comprising nitrogen from a reverse Brayton cycle refrigerant system, introducing the liquefied refrigerant stream into a contaminant removal column as a reflux stream removing a contaminant stream from the bottom of the contaminant removal column, removing a vapor stream enriched in nitrogen from the top of the contaminant removal column, and introducing the vapor stream enriched in nitrogen back into the reverse Brayton cycle refrigerant system.