By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's most significant industry program in Las Vegas high-end jets are enticing purchasers with their smooth shapes, luxurious cabins - and increasingly, their usage of alternative fuels.

Fuel manufacturers and jetmakers are eager to display novel forms of air travel fuel considered less damaging to the climate, from utilized cooking oil to the clearly less glamorous meat waste.

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

Their hope is that embracing sustainable fuel to suppress emissions might make service jets more appealing to ecologically conscious buyers - especially corporations facing concerns over sustainability from investors or green campaign groups.

The availability of less polluting private jets could likewise spare the abundant and well-known the negative promotion experienced by Britain's Prince Harry and his spouse Meghan over a recent personal jet journey to southern France.

Five Gulfstream jets on display 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 industrial officer of Boston-based biofuel producer World Energy, which produces fuel from meat waste utilized by Gulfstream.

"All of our item is inedible."

Some of the other 79 airplane on screen are expected to be powered by 150,000 gallons of other renewable fuel mixes expected to be pumped at the show.

FLIGHT SHAMING

Private jets represent less than 0.1% of total yearly carbon globally, however can give off, on average, up to 20 times more carbon emissions per guest mile than jetliners, according to the London-based personal charter company Victor.

Prince Harry has safeguarded his periodic use of private jets to guarantee his household's security, and has said that on the uncommon celebrations he does not fly commercially he offsets his emissions.

But planemakers state occurrences such as the furore over his itinerary have actually included fresh difficulties for a market currently aiming to validate its contribution to cutting corporate costs.

"Incidents of flight shaming including making use of personal jets are regrettable when you think about that our industry has delivered fuel performance improvements of 40% over the previous 40 years," stated Bombardier Aviation President David Coleal.

Bombardier thinks increased sustainable fuel use will help the industry make inroads with corporations and wealthy purchasers. According to market data, billionaires only have a 19% business jet ownership rate.

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

Environmentalists and some experts stay doubtful that biojetfuels, typically blended 50-50 with kerosene, will make a considerable effect on public perceptions about luxury travel.

"No amount of jatropha curcas or Brazil-nut fuel can make company jets look eco-friendly," stated air travel expert Richard Aboulafia.

Demand from company jet operators for sustainable fuels now far surpasses supply and their interest might drive future production, Sherbacow stated.

World Energy, which produces 40 million gallons of biofuel at its California plant, could broaden production up to 150 million gallons by 2022.

Corporate charter business and consultants are likewise seeing more interest from consumers who wish 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 corporate jet usage research study his company recently completed for a Fortune 500 company.

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