文摘

Yield and composition of pyrolysis oil were tested by fixed bed pyrolysis reactor and GC-MS. Algae pyrolysis kinetics was also calculated by Lorentzian fitting multi-heating rate method with R 2--.98. Their activation energy was ranged from 94 to 216?kJ/mol and most of fitting peaks could be described by the random nucleation followed by growth mechanism. Higher bio-oil yield of 35.0?% for Chlorella biomass and 40.6?% for Spirulina biomass at 425?°C have been obtained, while it is 49.4?% at 450?°C for Chrysophyceae biomass. The main compounds of pyrolysis oil included aliphatic and alicyclic hydrocarbons, aromatic hydrocarbons, nitrogenated compounds (nitriles, amines, amines, and N-heterocyclic compounds), carboxylic acids, ketones, alcohols, furans, phenols, ester, and others. Carbon number distribution of bio-oil is similar to that of gasoline and diesel, and fatty acid has an influence on bio-oil carbon distribution. Components biofuel model based on algal biomass component was established and the difference between simulated value and experiment value is less 3.58?%. Kinetics biofuel model based on fitting peak areas in pyrolysis kinetics was established and the difference between simulated value and experiment value is less 3.45?%. Pyrolysis oil yield can be quickly and efficiently achieved with these two models.