Category Archives: Algae Energy

Dimethyl Ether

Dimethyl ether (DME or CH3-O-CH3), is a new fuel that has attracted much atten­tion recently. Today DME is made from natural gas, but DME can also be produced by gasifying biomass. DME can be stored in liquid form at 5 to 10 bars pressure at normal temperature. A major advantage of DME is its naturally high cetane number, which means […]

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Historical Perspective

Historically, algae have been seen as a promising source of protein and have been ac­tively cultured by humans for centuries, mainly for food. Growing algae as a source of protein on a large scale in open ponds was first conceived by German scientists during World War II (Soeder 1986). The first attempt in the USA to translate the biological requirements […]

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Liquefaction of Algal Cells

Hydrocarbons of algal cells have been separated by extraction with organic solvent after freeze-drying and sonicating the algal cells. However, these procedures are not suitable for separation on a large scale because they are costly. Therefore, an effec­tive method is liquefaction for separating hydrocarbons as liquid fuel from harvested algal cells with high moisture content. The direct thermochemical liquefaction can […]

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Other Bio-oxygenated Liquid Fuels

Methanol and ethanol are not the only transportation fuels that might be made from wood. A number of possibilities exist for producing alternatives. The most promis­ing bio-oxygenated fuels, and closest to being competitive in current markets with­out subsidy, are ethanol, methanol, ethyl-tert-butyl ether, and anti-methyl-tert-butyl ether. Other candidates include isopropyl alcohol, sec-butyl alcohol, tert-butyl alco­hol, mixed alcohols, and tert-amylmethyl ether.

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Biofuels

The term biofuel refers to solid, liquid, or gaseous fuels that are predominantly pro­duced from biorenewable or combustible renewable feedstocks. Liquid biofuels will be important in the future because they will replace petroleum fuels. The biggest dif­ference between biofuels and petroleum feedstocks is oxygen content. Biofuels are nonpolluting, locally available, accessible, sustainable, and reliable fuels obtained from renewable sources.

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