SYSTEMS AND METHODS FOR PRODUCING LIQUID FUELS FROM LANDFILL GASES

摘要

The present invention provides a method and system for producing liquid fuel from landfill gas, the method comprising: (i) providing O2, steam and landfill gas comprising 30 to 70 %mol methane and 35 to 55 %mol CO2 to a single tri-reformer reactor comprising a first catalyst; (ii) supplying energy to said single tri-reformer reactor; (iii) performing a tri-reforming process on said landfill gas, wherein said tri- reforming process comprises carbon dioxide reforming, steam reforming, water-gas shifting, and methane oxidation, to produce synthesis gas having a H2:CO ratio of approximately 2:1; (iv) providing the synthesis gas to a Fischer-Tropsch synthesis (FTS) reformer comprising a second catalyst; (v) converting said synthesis gas into liquid fuel, fuel gas and steam within the FTS reformer; and (vi) combusting at least some of said fuel gas to provide said energy to said tri-reformer reactor, whereby said method for producing liquid fuel is at least partially self-sufficient in terms of energy for said tri-reforming process.