By Allison Lampert

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

Fuel manufacturers and jetmakers are eager to display novel types of aviation fuel considered less damaging to the environment, from used cooking oil to the noticeably less attractive meat waste.

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

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

The accessibility of less contaminating personal jets could likewise spare the rich and well-known the unfavorable promotion experienced by Britain's Prince Harry and his better half Meghan over a recent personal jet journey 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 market," said Bryan Sherbacow, chief business officer of Boston-based biofuel manufacturer World Energy, which produces fuel from meat waste utilized by Gulfstream.

"All of our item is inedible."

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

FLIGHT SHAMING

Private jets account for less than 0.1% of total yearly carbon emissions internationally, but can discharge, usually, up to 20 times more carbon emissions per guest mile than jetliners, according to the London-based private charter firm Victor.

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

But planemakers state events such as the furore over his itinerary have included fresh obstacles for an industry currently aiming to validate its contribution to cutting corporate costs.

"Incidents of flight shaming involving making use of personal jets are regrettable when you consider that our industry has delivered fuel performance improvements of 40% over the past 40 years," stated Bombardier Aviation President David Coleal.

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

But even an image makeover - with jets sporting stickers like "this airplane flies on sustainable fuels" and organisers adding alternative fuel pumps for checking out planes - is unlikely to satisfy all critics at the Oct 22-24 high-end jet event.

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

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

Demand from organization jet operators for sustainable fuels now far surpasses supply and their interest might drive future production, Sherbacow said.

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

Corporate charter companies and specialists are also seeing more interest from consumers who wish to buy 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 company recently completed for a Fortune 500 business.

"At the end of the day, I think that price, expense per hour, variety, speed and efficiency, that's still the (sales) chauffeur. But I believe people 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)