外文文献： 海藻液化Algae Liquefaction.pdfVIP

Algae Liquefaction H. Baloyi, S. Marx, P van der Gryp Focus area: Energy Systems, Associated chair: Bio fuels and other clean alternative fuels. School of Chemical and Minerals Engineering, North-West University (Potchefstroom Campus), Potchefstroom, South Africa, Tel +27 18 299 1995, Email hope.baloyi@nwu.ac.za Abstract Increased awareness of depleting fossil fuel resources and the impact of fossil fuels on the environment has led the way for development of more renewable and sustainable energy sources. Algae oil is considered a very promising feedstock for biodiesel production due to its high oil yield per hectare and the fact that it is not an edible feedstock which lessens the impact on food security and food prices. In this study, liquefaction of algae biomass for bio-oil recovery was studied. Scenedesmus acutus was used as algae biomass feedstock. The objective of the study was to determine suitable liquefaction operating conditions and the effect that these conditions have on bio-oil yields and properties of bio-oil obtained from the hydrothermal liquefaction of Scenedesmus acutus. Different Scenedesmus acutus to water ratios (3g/100ml, 6g/100ml, and 9g/100ml) were liquefied at various temperatures ranging from 280 to 360°C, at a constant catalyst load of 5 wt% KOH under CO₂ and N₂ atmospheres. Analysis of the chemical composition of the bio-oil products were determined using elemental analysis; gas chromatography and Fourier transform infrared spectroscopy (FTIR). Improved oil yields were observed under CO₂ atmosphere with a maximum bio-oil yield of 25.93 wt% at 360°C, 6g/100ml biomass load and 5wt% KOH at 30 minutes holding time. Keywords: Liquefaction, Scenedesmus acutus, bio-oil 1. Introduction The increase in petroleum crude oil price