By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's greatest market show in Las Vegas luxury jets are enticing buyers with their streamlined silhouettes, luxurious cabins - and progressively, their usage of alternative fuels.

Fuel producers and jetmakers are keen to showcase unique types of air travel fuel deemed less harmful to the climate, from utilized cooking oil to the distinctly less glamorous meat waste.

Business jet operators, like airline companies, have actually acquiesced environmental pressure on air travel and dedicated to cutting in half carbon emissions by 2050 compared to 2005.

Their hope is that adopting sustainable fuel to curb emissions could make service jets more appealing to environmentally conscious purchasers - specifically corporations facing questions over sustainability from shareholders or green project groups.

The availability of less contaminating personal jets might likewise spare the abundant and well-known the unfavorable promotion by Britain's Prince Harry and his wife Meghan over a recent personal jet journey to southern France.

Five Gulfstream jets on screen in Las Vegas are utilizing California-produced fuel from inedible beef tallow.

The current waste-based fuels consist of "fats, grease and oils that are by-products of the food market," stated Bryan Sherbacow, chief business officer of Boston-based biofuel producer World Energy, which produces fuel from meat waste utilized by Gulfstream.

"All of our item is inedible."

A few of the other 79 aircraft on display screen are expected to be powered by 150,000 gallons of other eco-friendly fuel mixes anticipated to be pumped at the program.

FLIGHT SHAMING

Private jets account for less than 0.1% of total yearly carbon emissions internationally, however can release, typically, up to 20 times more carbon emissions per guest mile than jetliners, according to the London-based private charter company Victor.

Prince Harry has safeguarded his occasional usage of personal jets to ensure his household's safety, and has actually stated that on the rare occasions he does not fly commercially he offsets his emissions.

But planemakers state occurrences such as the furore over his itinerary have included fresh challenges for a market already striving to validate its contribution to cutting corporate expenses.

"Incidents of flight shaming including making use of personal jets are regrettable when you think about that our industry has actually delivered fuel efficiency enhancements of 40% over the past 40 years," said Bombardier Aviation President David Coleal.

Bombardier believes increased sustainable fuel use will assist the industry make inroads with corporations and rich purchasers. According to market information, billionaires just have a 19% company jet ownership rate.

But even an image transformation - with jets sporting stickers like "this aircraft flies on eco-friendly fuels" and organisers adding alternative fuel pumps for going to planes - is unlikely to please all critics at the Oct 22-24 high-end jet event.

Environmentalists and some analysts remain hesitant that biojetfuels, typically blended 50-50 with kerosene, will make a considerable impact on public understandings about high-end travel.

"No quantity of jatropha curcas or Brazil-nut fuel can make business jets look eco-friendly," stated air travel analyst Richard Aboulafia.

Demand from service jet operators for renewable fuels now far goes beyond supply and their interest could drive future production, Sherbacow stated.

World Energy, which produces 40 million gallons of biofuel at its California plant, could expand production as much as 150 million gallons by 2022.

Corporate charter companies and specialists are likewise seeing more interest from customers who want to purchase carbon credits to balance out emissions from their flights.

Brian Proctor, CEO of Mente Group, a U.S. consultancy, said emissions played a role in a business jet utilization study his business recently completed for a Fortune 500 company.

"At the end of the day, I think that cost, expense per hour, range, speed and performance, that's still the (sales) motorist. But I think individuals are ending up being more mindful of the sustainability of operations and how it affects the planet." (Reporting By Allison Lampert, Editing by Tim Hepher and Alexandra Hudson)