Fig. 6

Life cycle inventory system boundaries. a Overview of the natural gas steam reforming-based bio-jet fuel process. The type of energy source going to the boiler depends on the biorefinery simulation. NGSR bio-jet uses natural gas and lignin. NGSR-HF uses hog fuel and lignin. Not pictured, but included in the system boundaries are a waste water treatment facility, disposal of solid wastes, and an excess electricity by-product. b Overview of the lignin gasification-based bio-jet fuel process. The type of energy source going to the boiler depends on the biorefinery simulation. LG bio-jet uses natural gas. LG-HF uses hog fuel. Not pictured, but included in the system boundaries are a waste water treatment facility, disposal of solid wastes, and import of electricity