Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"HEFA"”.
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Greenhouse gas life cycle assessment of canola-derived HEFA biojet fuel in Western Canada
… via the hydroprocessed esters and fatty acids (HEFA) pathway. Canola is one of the most readily available feedstocks for HEFA fuel production in Canada, and interest has been shown in developing a domestic supply chain for biojet fuel. However, there is substantial variation in the reported …
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Microalgae-derived HEFA jet fuel : environmental and economic impacts of scaled/integrated growth facilities and global production potential
… gas (GHG) emissions of microalgae-derived HEFA jet fuel. Additionally, the global production potential of HEFA-J is quantified in order to assess the efficacy of microalgae as an energy crop. Impacts from the integration/scaling of microalgae cultivation were quantified by calculating …
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A stochastic techno-economic comparison of alternative jet fuel production pathways
… were hydroprocessed ester and fatty acids (HEFA) using soybean oil, yellow grease, and tallow; advanced fermentation (AF) using corn grain, sugarcane, and herbaceous biomass; conventional gasification and Fischer-Tropsch (FT) using municipal solid waste; aqueous phase processing (APP) using …
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Analysis of Double Cropping to Expand Sustainable Aviation Fuel Production in the United States
… using the hydroprocessed esters and fatty acids (HEFA) and alcohol to jet (ATJ) via ethanol pathways for conversion. The maximum SAF potential was quantified with current land use considerations, and showed that today, double cropping can increase SAF production by 268% to 464% compared to single …
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Quantitative policy analysis for aviation biofuel production technologies
… grain, hydroprocessed esters and fatty acids (HEFA) from inedible fats and oils (IFO), HEFA from palm fatty acid distillate (PFAD), synthesized iso-paraffins (SIP) from sugarcane, Fischer-Tropsch (FT) gasification and synthesis from municipal solid waste (MSW), and micro FT from wood residues. …
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Effects of O-Ring Elastomers with Conventional and Synthesized Aviation Fuels with a Novel Elastomer Dynamic Compression System
… elastomer reaction with conventional Jet A, HEFA, ATJ, and synthetic aromatic kerosene individually along with blends of synthetic fuels with Jet A. Additionally, the complex pathway of fuel into the O-ring is investigated in conjunction with compression effects on elastomer swell.The …
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Water consumption footprint and land requirements of alternative diesel and jet fuel
… and hydroprocessed esters and fatty acids (HEFA) MD and biodiesel from oilseed crops, in the US. FT and rainfed biomass-derived MD have lifecycle blue water consumption footprints between 1.4 and 18.1 lwater/lMD, comparable to conventional MD, between 4.1 and 7.5 lwater/lMD. Irrigated …
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Fuel Droplet Optical Diagnostic Techniques for Lean Premixed Prevaporized Aeroengine Combustors
… hydrotreated esters and fatty acids (HEFA) fuels are studied under various operating conditions. Two holographic imaging techniques, long standoff digital in-line holography (DIH) and digital off-axis holography (DOH), are also implemented in order to measure fuel droplet sizes at the …
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Environmental and economic tradeoffs of feedstock usage for liquid fuels and power production
… using natural gas, coal and/or switchgrass; HEFA (hydroprocessed esters and fatty acids) jet fuel from soybean, palm, rapeseed and jatropha; and advanced fermentation jet (AF-J) fuel from sugarcane, corn grain and switchgrass. We find that ERO₁ 1 for conventional jet fuel from conventional …
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Surrogate modeling of alternative jet fuels for study of autoignition characteristics
… termed hydroprocessed esters and fatty acids (HEFA). HRJ fuels compared with traditional jet fuel, both commercial and military, have higher paraffinic and lower aromatic content. Surrogate models currently available focus on several components including n-decane, n-dodecane, 2-methylundecane, …