By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's biggest market program in Las Vegas luxury jets are luring buyers with their sleek silhouettes, luxurious cabins - and significantly, their use of alternative fuels.

Fuel producers and jetmakers are eager to display unique forms of air travel fuel considered less hazardous to the climate, from used cooking oil to the clearly less glamorous meat waste.

Business jet operators, like airlines, have acquiesced ecological pressure on aviation and dedicated to halving carbon emissions by 2050 compared with 2005.

Their hope is that embracing sustainable fuel to suppress emissions might make business jets more attractive to ecologically conscious purchasers - especially corporations dealing with questions over sustainability from shareholders or green campaign groups.

The accessibility of less contaminating personal jets could also spare the rich and popular the negative promotion experienced by Britain's Prince Harry and his partner Meghan over a current private jet trip to southern France.

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

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

"All of our product is inedible."

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

FLIGHT SHAMING

Private jets represent less than 0.1% of total annual carbon emissions worldwide, but can give off, on average, approximately 20 times more carbon emissions per traveler mile than jetliners, according to the London-based personal charter firm Victor.

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

But planemakers say occurrences such as the furore over his schedule have added fresh difficulties for an industry currently striving to validate its contribution to cutting business expenses.

"Incidents of flight shaming involving the use of private jets are regrettable when you think about 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 usage will assist the industry make inroads with corporations and wealthy purchasers. According to industry data, billionaires only have a 19% service jet ownership rate.

But even an image transformation - with jets sporting sticker labels like "this airplane flies on renewable fuels" and organisers including alternative fuel pumps for going to planes - is not likely to please all critics at the Oct 22-24 high-end jet event.

Environmentalists and some experts stay doubtful that biojetfuels, normally blended 50-50 with kerosene, will make a considerable effect on public perceptions about luxury 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 organization jet operators for renewable fuels now far goes beyond supply and their interest could drive future production, Sherbacow said.

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

Corporate charter business and specialists are likewise seeing more interest from consumers who desire to buy carbon credits to offset emissions from their flights.

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

"At the end of the day, I believe that rate, expense per hour, variety, speed and efficiency, that's still the (sales) chauffeur. But I think individuals are ending up being more familiar with the sustainability of operations and how it impacts the planet." (Reporting By Allison Lampert, Editing by Tim Hepher and Alexandra Hudson)