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
Sydney Tar Ponds pollution flowing into the Tar Ponds, naming this operation Cape Breton Development Corporation (DEVCO). SYSCO purchased the coke ovens from DEVCO in 1973. Dominion Tar and Chemical Company Ltd (Domtar) operated a coal tar refining plant and a coal tar storage facility in Sydney from 1903-1962. This facility was situated directly adjacent to and north of the coke oven operations. It diverted coal tar from the coke ovens, refined it, moved it through pipes, and stored it in tanks for shipping elsewhere. Domtar ceased operations in Sydney in 1962 abandoning its storage tanks, waste disposal lagoons, pipes, buildings and equipment.