By Allison Lampert

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

Fuel producers and jetmakers are eager to display unique forms of aviation fuel deemed less damaging to the climate, from utilized cooking oil to the clearly less glamorous meat waste.

Business jet operators, like airlines, have actually bowed to ecological pressure on air travel and dedicated to halving carbon emissions by 2050 compared with 2005.

Their hope is that adopting renewable fuel to curb emissions might make business jets more appealing to environmentally mindful buyers - especially corporations facing concerns over sustainability from shareholders or green project groups.

The availability of less polluting private jets could also spare the rich and well-known the negative promotion experienced by Britain's Prince Harry and his wife Meghan over a recent private jet trip to southern France.

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

The most recent waste-based fuels consist of "fats, grease and oils that are byproducts of the food industry," stated Bryan Sherbacow, chief commercial officer of Boston-based biofuel manufacturer 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 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 represent less than 0.1% of overall yearly carbon emissions worldwide, however can release, typically, approximately 20 times more carbon emissions per passenger mile than jetliners, according to the London-based personal charter firm Victor.

Prince Harry has safeguarded his occasional use of private jets to guarantee his family's safety, and has said that on the rare events he does not fly commercially he offsets his emissions.

But planemakers state events such as the furore over his schedule have actually included fresh obstacles for an industry already striving to validate its contribution to cutting business costs.

"Incidents of flight shaming including using personal jets are regrettable when you think about that our industry has actually delivered fuel efficiency enhancements of 40% over the past 40 years," said Bombardier Aviation President David Coleal.

Bombardier thinks increased sustainable fuel usage will assist the market make inroads with corporations and rich purchasers. According to market information, billionaires only have a 19% organization jet ownership rate.

But even an image remodeling - with jets sporting sticker labels like "this aircraft flies on renewable fuels" and organisers adding alternative fuel pumps for visiting aircrafts - is unlikely to please all critics at the Oct 22-24 high-end jet event.

Environmentalists and some analysts remain skeptical that biojetfuels, usually mixed 50-50 with kerosene, will make a considerable influence on public understandings about luxury travel.

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

Demand from business jet operators for renewable fuels now far surpasses supply and their interest could drive future production, Sherbacow said.

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

Corporate charter business and specialists 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 contributed in a corporate jet usage study his business just recently completed for a Fortune 500 company.

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