By Allison Lampert

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

Fuel manufacturers and jetmakers are keen to display novel types of air travel fuel deemed less damaging to the climate, from used cooking oil to the clearly less attractive meat waste.

Business jet operators, like airline companies, have acquiesced ecological pressure on aviation and committed to cutting in half carbon emissions by 2050 compared to 2005.

Their hope is that embracing sustainable fuel to suppress emissions might make company jets more attractive to environmentally mindful buyers - especially corporations dealing with questions over sustainability from shareholders or green campaign groups.

The schedule of less polluting private jets might also spare the abundant and popular the unfavorable promotion experienced by Britain's Prince Harry and his spouse Meghan over a current personal jet trip to southern France.

Five Gulfstream jets on display in Las Vegas are using 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," stated Bryan Sherbacow, primary business officer of Boston-based biofuel producer World Energy, which produces fuel from meat waste used by Gulfstream.

"All of our product is inedible."

Some of the other 79 aircraft on screen are anticipated to be powered by 150,000 gallons of other sustainable fuel mixes anticipated to be pumped at the show.

FLIGHT SHAMING

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

Prince Harry has protected his occasional use of personal jets to guarantee his family's security, and has actually said that on the uncommon occasions he does not fly commercially he offsets his emissions.

But planemakers say events such as the furore over his itinerary have actually included fresh difficulties for an industry already making every effort to validate its contribution to cutting business expenses.

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

Bombardier thinks increased sustainable fuel usage will help the industry make inroads with corporations and rich buyers. According to market information, billionaires only have a 19% organization 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 checking out aircrafts - is not likely to satisfy all critics at the Oct 22-24 high-end jet event.

Environmentalists and some analysts remain doubtful that biojetfuels, usually blended 50-50 with kerosene, will make a considerable 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 air travel analyst Richard Aboulafia.

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

World Energy, which produces 40 million gallons of biofuel at its California plant, might expand production as much as 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, stated emissions played a role in a business jet utilization research study his business recently finished for a Fortune 500 company.

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