Screening method for raw materials of high-yield sustainable aviation fuel

A screening method for raw materials of high-yield sustainable aviation fuel, comprising the following steps:

• Step 1, obtaining composition and content of fatty acids in different waste animal and vegetable oils;
• Step 2, analyzing the positions of chemical bond cleavage during the hydrodeoxygenation, cracking, and isomerization processes of different fatty acids in waste animal and vegetable oils to produce sustainable aviation fuel, and obtaining the theoretical limit yield of sustainable aviation fuel prepared from different fatty acids;
• when the fatty acids are unsaturated, the theoretical limit yield of sustainable aviation fuel prepared through the hydrogenation saturation, hydrodeoxygenation, cracking, and isomerization of unsaturated fatty acids is calculated based on the theoretical limit yield of alkanes produced from the hydrogenation saturation, and hydrodeoxygenation of unsaturated fatty acids and the theoretical limit yield of sustainable aviation fuel generated from the cracking of these alkanes;
• the formula for calculating the theoretical limit yield of sustainable aviation fuel produced from unsaturated fatty acids is as follows:
• P
• i
• =
• B
• i
• ×
• C
• i
• where Pi represents the theoretical limit yield of sustainable aviation fuel produced from unsaturated fatty acids, Bi represents the theoretical limit yield of alkanes produced from the hydrogenation saturation, hydrodeoxygenation of unsaturated fatty acids, and Ci represents the theoretical limit yield of sustainable aviation fuel generated from the cracking of these alkanes after hydrodeoxygenation;
• when the fatty acids are saturated, the theoretical limit yield of alkanes produced from the hydrodeoxygenation of saturated fatty acids is taken as the theoretical limit yield of sustainable aviation fuel produced from saturated fatty acids;
• Step 3, based on the composition and content of fatty acids in waste animal and vegetable oils, as well as the theoretical limit yields of sustainable aviation fuel prepared from different fatty acids, calculating the theoretical yields of sustainable aviation fuel produced from different waste animal and vegetable oils as raw materials;
• the formula for calculating the theoretical yield of sustainable aviation fuel is as follows:
• η
• =
• ∑
• n
• i
• =
• 1
• (
• A
• i
• ×
• P
• i
• )
• where Ai represents the content of different fatty acids in waste animal and vegetable oils, Pi represents the theoretical limit yield of sustainable aviation fuel prepared from different fatty acids, and n represents the theoretical yield of sustainable aviation fuel;
• Step 4, based on the theoretical yield of sustainable aviation fuel, selecting appropriate animal and vegetable oils as raw materials for producing sustainable aviation fuel;
• in step 2, when analyzing the positions of chemical bond cleavage during the hydrodeoxygenation, cracking, and isomerization processes of different fatty acids in waste animal and vegetable oils to produce sustainable aviation fuel, the decarboxylation and decarbonylation reactions of fatty acids are not taken into account;
• additionally, the re-polymerization of carbon dioxide, ethane, propane, and naphtha produced during the production process, as well as the catalytic cracking reactions of long-chain alkanes, are also not taken into account.