SYSTEMS AND METHODS FOR PRODUCING CNG AND NGLS FROM RAW NATURAL GAS, FLARE GAS, STRANDED GAS, AND/OR ASSOCIATED GAS

摘要

The present invention is a field-deployable system for producing compressed natural gas (CNG) and natural gas liquids (NGLs) from a raw gas stream comprising a compressor; a dehydrator; a refrigerator having one or more stages; and a separation subsystem adapted to separate the raw gas stream into three useable product streams: a methane stream that is at least 70% methane, an ethane-rich stream, and a NGLs stream having a vapor pressure of no more than 17 bar (250 psi) at 38° C. (100° F.). The methane stream is sufficiently lean to be useable in existing natural gas engines without modification, and is compressed to produce CNG. The system can be utilized to capture and provide value to stranded or flared gas from liquids-rich gas production sites, by producing natural gas liquids for transport, and CNG which can be transported and is suitable for use in existing gas generators, vehicles, and/or trucks.