Biofuels production from microalgae by liquefaction and supercritical water pyrolysis

摘要

Algae are mainly composed of lipids, carbohydrates, proteins, and nucleic acids. Microalgae can be converted into liquid and gaseous products by direct liquefaction, pyrolysis, and supercritical water pyrolysis. The effect of pyrolysis temperature on the yield of bio-oil from algae samples was reviewed. The yield of bio-oil from pyrolysis of the samples increased with temperature. In general, microalgae bio-oils are of higher quality than bio-oil from woody biomass. The yield of bio-oil from pyrolysis of the microalgae increased with temperature. The yields of hydrogen from microalgae biomass by pyrolysis and supercritical water pyrolysis increase with increasing of temperature. In general, in the supercritical water pyrolysis temperature is higher than that of pyrolysis and the yield of hydrogen from the supercritical water pyrolysis is higher than that of the pyrolysis. Algal oil from microalgae also is the promising and sustainable feedstock for biodiesel production.