By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's biggest industry show in Las Vegas high-end jets are tempting buyers with their streamlined silhouettes, luxurious cabins - and increasingly, their usage of alternative fuels.

and jetmakers are keen to display novel kinds of aviation fuel deemed less damaging to the climate, from utilized cooking oil to the clearly less glamorous meat waste.

Business jet operators, like airline companies, have bowed to environmental pressure on aviation and devoted to cutting in half carbon emissions by 2050 compared with 2005.

Their hope is that adopting sustainable fuel to suppress emissions could make service jets more appealing to ecologically conscious buyers - especially corporations facing concerns over sustainability from shareholders or green project groups.

The accessibility of less contaminating personal jets might likewise spare the abundant and popular the unfavorable publicity experienced by Britain's Prince Harry and his other half Meghan over a recent private jet trip 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 include "fats, grease and oils that are by-products of the food industry," said Bryan Sherbacow, primary commercial officer of Boston-based biofuel manufacturer World Energy, which produces fuel from meat waste utilized by Gulfstream.

"All of our item is inedible."

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

FLIGHT SHAMING

Private jets represent less than 0.1% of total annual carbon emissions internationally, but can produce, on average, as much as 20 times more carbon emissions per guest mile than jetliners, according to the London-based personal charter firm Victor.

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

But planemakers say occurrences such as the furore over his schedule have added fresh challenges for a market already striving to justify its contribution to cutting corporate costs.

"Incidents of flight shaming including making use of private jets are unfortunate when you consider that our market has delivered fuel efficiency enhancements of 40% over the previous 40 years," said Bombardier Aviation President David Coleal.

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

But even an image makeover - with jets sporting stickers like "this aircraft flies on sustainable fuels" and organisers adding alternative fuel pumps for visiting airplanes - is not likely to satisfy all critics at the Oct 22-24 luxury jet event.

Environmentalists and some experts remain hesitant that biojetfuels, generally mixed 50-50 with kerosene, will make a significant influence on public perceptions about high-end travel.

"No quantity of jatropha curcas or Brazil-nut fuel can make business jets look eco-friendly," said aviation expert Richard Aboulafia.

Demand from company jet operators for sustainable fuels now far exceeds supply and their interest might 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 business and specialists are also seeing more interest from consumers who want to buy carbon credits to balance out emissions from their flights.

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

"At the end of the day, I think that price, expense per hour, range, speed and efficiency, that's still the (sales) chauffeur. But I believe people are becoming more knowledgeable about the sustainability of operations and how it affects the world." (Reporting By Allison Lampert, Editing by Tim Hepher and Alexandra Hudson)