| 摘要 |
Embodiments of the invention described herein increase the amount of cetane in fuel. Cetane improvers comprising .beta.-carotene, which was prepared in an inert atmosphere, as well as, methods of preparing such compositions are described. A preferred composition is a No. 2 diesel fuel comprising a cetan e improver, which comprises a .beta.-carotene that was prepared in an inert atmosphere.
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