February 2009

Special Report: Clean Fuels

Consider new technology to produce renewable diesel

New methodology yields 'green' fuel from nonfood-based feedstock

A new hydrotreating process enables the co-processing of light gasoil (GO) and raw tall diesel (RTD)—producing a renewable diesel that can meet all EN 590 specifications. This case history discusses the first new renewable diesel unit installed at Preem AB's Gothenburg refinery. Many challenges were encountered that must be addressed when contemplating a renewable feedstock. Success of this project relied on detailed knowledge of process technology, reaction chemistry and catalyst behavior. This project involved innovative solutions and allowed the refiner to maintain high hydrodesulfurization (HDS) activity throughout the cycle while co-processing organic material and mineral oil.

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