Abstract: The mobile gas separation unit is transportable from well site to well site. The mobile gas separation unit will separate CO2 from natural gas at the well site where the natural gas is produced. The CO2 may be a part of a fracturing fluid that is used to fracture the formation from which natural gas is to be produced. The CO2 will be produced up the Well with the natural gas rather than venting or flaring the gas stream that includes the CO2 in the atmosphere. The mobile gas separation unit will separate CO2 from the gas stream so that a sales gas stream can be communicated to a natural gas sales pipeline or gathering system.