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
Tyrolean shale oil Tyrol in Seefeld area were used from 1350 until 1964. In 1902, Martin Albrecht, a collector of minerals, discovered oil shale deposits on the shore of Lake Achen at Pertisau; his family still exploits and markets the oil. Tyrolean shale oil has always been an integral part of Tyrolean medicine. The shale oil contains bound sulfur, which exerts its effect in shale oil. Long before the oil refinery, the oil of the Alps, the "black gold", was already used for tar, light oil (naphtha), impregnation of wood fences, as waterproofing for roofs and asphalt roads. Due to the low yield,