Air New Zealand and Boeing
have confirmed 3 December 2008 as the date for the airline's sustainable biofuels flight from Auckland using a
747-400 jetliner. Conducted in partnership with Rolls-Royce and UOP, a Honeywell company, one of the airplane's four Rolls-Royce RB211
engines will be powered in part using advanced generation biofuels derived from
Boeing, Air New Zealand and UOP have worked diligently with growers and project developer Terasol Energy to identify sustainable jatropha in
adequate quantities to conduct thorough preflight testing. Using proprietary UOP fuel processing technology, the jatropha crude oil was
successfully converted to biojet fuel, marking the world's first large-scale production run of a commercially viable and sustainable biofuel for
As part of the fuel verification process, UK-based engine maker Rolls-Royce's technical team conducted extensive laboratory testing to ensure
compatibility with today's jet engine components and to validate the fuel meets stringent performance criteria for aviation fuel.
"In preparation for Air New Zealand's test flight we achieved our near-term goal - identifying and sourcing the first large-scale run of sustainable
biofuel for commercial aviation," said Boeing Commercial Airplane's Managing Director of Environmental Strategy Billy Glover.
technology exists today, and based on results we've seen, it's highly encouraging that this fuel not only met but exceeded three key criteria for
the next generation of jet fuel: higher than expected jet fuel yields, very low freeze point and good energy density," Glover
added. "That tells
us we're on the right path to certification and commercial availability."
Because of the unique environment in which aviation operates, stringent criteria are in place to ensure that any alternative fuel meets or exceeds
current jet fuel requirements. Advance testing for the Air New Zealand flight showed that the jatropha-based biofuel met all critical specifications,
including a freeze point at -53 degrees Fahrenheit (-47 degrees Celsius) and a flash point at 100 degrees Fahrenheit (38 degrees Celsius).
"Laboratory testing showed the final blend had excellent properties, meeting and in many cases exceeding the stringent technical requirements
for fuels used in civil and defense aircraft," said Chris Lewis, Rolls-Royce company specialist for fuels. "The blended fuel therefore meets the
essential requirement of being a 'drop-in' fuel, meaning its properties will be virtually indistinguishable from conventional fuel, Jet A1, which is
used in commercial aviation today."
To process the jatropha crude, the team relied on UOP's green jet fuel processing technology based on hydroprocessing methodologies that
are commonly used to produce transportation fuels. During processing, hydrogen is added to remove oxygen from the biomass, resulting in a
bio-derived jet fuel that can be used as a petroleum replacement for commercial aviation.
Boeing is working with airlines and engine
manufacturers to gather biofuel performance data as part of the industry's efforts to revise the current American Society for Testing and
Materials (ASTM) standards to include fuels from sustainable plant sources.
Jatropha, which can be
grown in a broad range of conditions, produces seeds that contain inedible lipid oil that is extracted and used to produce fuel. Each seed produces 30 to 40% of its mass in oil.
Plant oil used to create the fuel for the Air New Zealand flight was sourced from nonarable lands in India and Southeastern Africa (Malawi,
Mozambique and Tanzania).
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