| 主权项 |
1. A process for reducing greenhouse gas emissions associated with a transportation fuel comprising:
(i) introducing a gas comprising biomethane to a pipeline system wherein the gas comprising biomethane has a heating value of less than 925 BTU/cubic foot; (ii) combining a first amount of the gas comprising biomethane having the heating value of less than 925 BTU/cubic foot with a second amount of natural gas having a heating value that is greater than that of the gas comprising biomethane by at least 50 BTU/cubic foot, said combining occurring at a combination point in the pipeline system to produce a mixed gas downstream of the combination point, said mixed gas having a heating value less than 900 BTU/cubic foot; (iii) measuring a value representing energy content and a value representing a volume of flow of all or a portion of the gas comprising biomethane in steps (i) or (ii); (iv) from the values measured in step (iii), obtaining or recording a value representing energy delivered for the gas comprising biomethane in one or more time periods; (v) withdrawing or causing the withdrawal of a third amount of natural gas from the pipeline system, said third amount of withdrawn natural gas being withdrawn at one or more locations in the pipeline system that are upstream of said combination point, wherein the withdrawn natural gas stream or streams have an average heating value that is greater than the heating value for the gas comprising biomethane by at least 50 BTU/cubic foot; (vi) measuring or causing a measurement of the volume of flow of the withdrawn natural gas at said one or more withdrawal locations in step (v), wherein a value representing the volume of flow is recorded for the withdrawn natural gas at said one or more withdrawal locations, and the energy delivered for the third amount of withdrawn natural gas is at least equal to the energy delivered for the gas comprising biomethane in step (iv); (vii) using or causing the use of the withdrawn natural gas measured in step (vi) as one of the transportation fuel and a feedstock to produce the transportation fuel, at least a portion of said transportation fuel associated with a lifecycle greenhouse gas emissions reduction of at least 50% compared to a gasoline baseline, said lifecycle greenhouse gas emissions reduction based at least in part on introducing the gas comprising biomethane to the pipeline system. |
