Pyrolysis oil are affected by temperature, reaction time, algae species, algae concentration, reaction atmosphere, and catalysts, in subcritical water reaction conditions. Bio-oil typically requires significant additional treatment to render it suitable as a refinery feedstock to replace crude oil derived from petroleum, coal-oil, or coal-tar. Tar is a black mixture of hydrocarbons and free carbon obtained from a wide variety of organic materials through destructive distillation. Tar can be produced from coal, wood, petroleum, or peat. Wood-tar creosote is a colourless to yellowish greasy liquid with a smoky odor, produces a sooty flame when burned, and has a burned taste. It is
Tar water of the cure of consumpton and indigestion ". London. Tar water Tar-water was a medieval medicine consisting of pine tar and water. As it was foul-tasting, it slowly dropped in popularity, but was revived in the Victorian era. It is used both as a tonic and as a substitute to get rid of "strong spirits". Both these uses were originally advocated by the philosopher George Berkeley, who lauded it in his tract "Siris: A Chain of Philosophical Reflections and Inquiries, Concerning the Virtues of Tar Water". It was regarded by medical experts to be quackery. The use of tar water