By Allison Lampert

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

Fuel manufacturers and jetmakers are eager to showcase unique kinds of air travel fuel considered less damaging to the climate, from utilized cooking oil to the definitely less glamorous meat waste.

Business jet operators, like airlines, have actually acquiesced environmental pressure on aviation and devoted 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 appealing to ecologically conscious buyers - specifically corporations facing questions over sustainability from investors or green campaign groups.

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

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

The most recent waste-based fuels include "fats, grease and oils that are by-products of the food industry," stated Bryan Sherbacow, chief industrial officer of Boston-based biofuel manufacturer World Energy, which produces fuel from meat waste used by Gulfstream.

"All of our item is inedible."

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

FLIGHT SHAMING

Private jets account for less than 0.1% of overall yearly carbon emissions globally, however can release, 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 actually protected his periodic use of personal jets to ensure his family's security, and has actually said that on the rare celebrations he does not fly commercially he offsets his emissions.

But planemakers state events such as the furore over his schedule have actually added fresh challenges for a market currently aiming to validate its contribution to cutting business expenses.

"Incidents of flight shaming involving the use of private jets are unfortunate when you consider that our industry has actually provided fuel performance enhancements of 40% over the past 40 years," said Bombardier Aviation President David Coleal.

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

But even an image makeover - with jets sporting sticker labels like "this aircraft flies on renewable fuels" and organisers adding alternative fuel pumps for checking out aircrafts - is unlikely to please all critics at the Oct 22-24 luxury jet occasion.

Environmentalists and some analysts stay skeptical that biojetfuels, typically combined 50-50 with kerosene, will make a significant effect on public perceptions about luxury travel.

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

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

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

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

Brian Proctor, CEO of Mente Group, a U.S. consultancy, said in a corporate jet usage research study his business just recently finished for a Fortune 500 company.

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