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Properties of bio-oil from alga fast pyrolysis were studied based on the molecular distillation. The composition of bio-oil and fractions was analyzed by GC-MS, and the thermal behavior of evaporation and decomposition was investigated using TG-FTIR. Fast pyrolysis of alga obtained a bio-oil yield of 20.54 % and a char yield of 31.12 % due to its low cellulose and hemicellulose content, and high lignin...
Pyrolysis oil (also called bio-oils) produced from biomass is a promising substitute for fossil fuels. However, bio-oil has many shortcomings, such as high viscosity, high oxygenate content, low stability and low heating value. Therefore, it is hard for direct high-grade fuel utilization before upgrading. In this paper, bio-oil upgrading techniques, such as catalytic hydrogenation, catalytic cracking,...
The experimental research on catalytic cracking of ketone components in biomass pyrolysis oil was carried out on a fix-bed reactor, using HZSM-5 zeolite as the catalyst. Based on the results, coke formation was little during the cracking of ketone components, and the main cracking products were aromatic hydrocarbons and unsaturated alicyclic hydrocarbons. Meanwhile, hydrocarbons were easily produced...
Carboxylic acids were attributed to the corrosivity of bio-oil and catalytic esterification was carried out to convert carboxylic acids and reduce the bio-oil corrosivity. After upgrading by esterification with propanol on a developed catalyst, the upgraded bio-oil had a higher heating value and lower carboxylic acids content. The carboxylic acids content in the Volatile fraction of Bio-Oil (VBO)...
The yield and properties of bio-oil are influenced by the species of spray medium used in the biomass fast pyrolysis. In this study, the GC-MS analysis of the whole bio-oil and of the mixture with isoparaffin and ethanol respectively gave information about the influence of spray medium on bio-oil composition. It is found that isoparaffin, compared with ethanol, has a slighter impact on the bio-oil...
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