Patent ID: 9514464
Filing Date: 2016-12-06
CPC Classification: C10G,C10L,F17D,G01F,G06Q,Y02E,Y02P

Claim Text:
1. A process for producing a transportation fuel comprising: (i) providing a gas comprising biomethane produced by anaerobic digestion that has a heating value of 350-925 BTU/cubic foot; (ii) combining the gas comprising biomethane having the heating value of 350-925 BTU/cubic foot in a pipeline system at a biomethane introduction point with natural gas having a heating value of at least 950 BTU/cubic foot, thereby producing a mixed gas downstream of the biomethane introduction point, and at least a portion of a mixed gas downstream of the biomethane introduction point is provided for use to generate heat, electricity or a combination thereof; (iii) measuring a value representing energy content and a value representing a volume of flow of the gas comprising biomethane introduced to the pipeline system in step (ii); (iv) from the values measured in step (iii), calculating a value representing energy delivered for said gas comprising biomethane in one or more time periods and recording a calculated value or values representing the calculated energy delivered; (v) withdrawing or causing the withdrawal of an amount of natural gas from the pipeline system at one or more locations upstream of said biomethane introduction point, which withdrawn natural gas has a heating value greater than the gas comprising biomethane by at least 25 BTU/cubic foot; (vi) measuring or causing a measurement of the volume of flow of the natural gas withdrawn in step (v) and recording a value or values representing the volume of flow at said one or more locations in step (v) and the energy delivered for the natural gas withdrawn in step (v) is at least substantially equal to the energy delivered for the gas comprising biomethane in step (iv); (vii) using or causing the use of natural gas measured in step (vi) as a transportation fuel, or as a fuel intermediate or a feedstock to produce a transportation fuel; and (viii) generating or causing the generation of a fuel credit.