Life-Cycle Analysis of Alternative Aviation Fuels in GREET

Bio-jet fuel conversion technologies

“…For salicornia oil, the emissions range from 35% to 76% of those from conventional jet fuel [3]. The GHG emissions of liquid fuel production via fast pyrolysis of cellulosic biomass have been studied by researchers at Argonne National Laboratory [128]. When hydrogen is generated from natural gas and bio-char is used to support the process energy, the GHG emissions are reduced by 45% relative to conventional fuels.…”

Methodological Questions of Cost–benefit Analysis for Projects Connected With Application of Alternative Fuels in Public Aviation

“…Fig. 2 WTWa analysis system boundary (ETJ ethanol-to-jet) [4] Among alternative fuels one solution can be the use of biofuels, which can be produced from various kinds of biomass, like photosynthetic microorganisms, that is, algae. Oil produced by them may be the appropriate source material for producing biodiesel, moreover, for this process the carbon dioxide from the atmosphere is used.…”

“…Oil produced by them may be the appropriate source material for producing biodiesel, moreover, for this process the carbon dioxide from the atmosphere is used. [4] Nowdays the biodiesel is keeping his spread within limits more factor, featuredly high cost of his production. It can be told , that more and more research are in this topic on large part of the world , and increases the number of the companies, what consider with fuel analysis, development of the biodiesel, or with its establishment [5].…”

Comparative evaluation of GHG emissions from the use of Miscanthus for bio-hydrocarbon production via fast pyrolysis and bio-oil upgrading

“…The hydrodeoxygenation (HDO) of bio-oil occurs in two stages over Pt/Al 2 O 3 catalyst as it produces more yields compared with conventional catalysts, such as sulfided NiMo/Al 2 O 3 and CoMo/Al 2 O 3 [75]. Due to lack of data for a specific emission factor for the Pt/ Al 2 O 3 catalyst, a crude estimate of 5 wt.% platinum/95 wt.% aluminium oxide composition was assumed [63,76]. The significance of this assumption is examined in the sensitivity analysis in Section 3.2.…”

“…Product distribution was based on experimental results reported in literature [82,83] due to lack of reliable chemical reaction kinetic models. Emission factor for H-ZSM5 catalyst was derived from the GREET model [76]. The products from the zeolite cracking reactor then go into the product separation section.…”