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NEXBTL
NEXBTL is a renewable diesel fuel production process commercialized by the Finnish oil and refining company Neste. Whether as an admixture or in its pure form, NEXBTL is able to supplement or partially replace diesel fuel without problems. Unblended NEXBTL meets the requirements set by the European pre-standard CEN TS 15940. Fuel blends meet the European diesel fuel standard EN 590.
Despite the name BTL, the feedstock is vegetable oil and waste animal fats, not whole plants. However, fuel quality is equal to the synthetic Fischer-Tropsch BTL and GTL diesel fuels.
==Process==
NEXBTL diesel is produced in a patented vegetable oil refining process. Chemically, it entails direct catalytic hydrogenolysis of plant oils, which are triglycerides, into the corresponding alkanes. The glycerol chain of the triglyceride is hydrogenated to the corresponding C3 alkane, propane — there is no glycerol sidestream. This process removes oxygen from the oil; the diesel is not an oxygenate like traditional transesterified FAME biodiesel. Catalytic isomerization into branched alkanes is then done to adjust the cloud point in order to meet winter operability requirements. As it is chemically identical to ideal conventional diesel, it requires no modification or special precautions for the engine.〔http://www.climatechange.ca.gov/events/2006-06-27+28_symposium/presentations/CalHodge_handout_NESTE_OIL.PDF〕〔(【引用サイトリンク】publisher = SAE International )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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