By Allison Lampert

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

Fuel manufacturers and jetmakers are eager to showcase unique forms of air travel fuel deemed less harmful to the climate, from used cooking oil to the definitely less glamorous meat waste.

Business jet operators, like airlines, have actually bowed to environmental pressure on aviation and dedicated to cutting in half carbon emissions by 2050 compared with 2005.

Their hope is that embracing sustainable fuel to suppress emissions might make service jets more appealing to environmentally mindful buyers - particularly corporations facing concerns over sustainability from investors or green campaign groups.

The accessibility of less polluting private jets could likewise spare the rich and well-known the unfavorable promotion experienced by Britain's Prince Harry and his spouse Meghan over a current private 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 current waste-based fuels include "fats, grease and oils that are byproducts of the food industry," said Bryan Sherbacow, primary industrial 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 airplane on display are expected 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 overall yearly carbon emissions internationally, however can emit, typically, approximately 20 times more carbon emissions per passenger mile than jetliners, according to the London-based private charter company Victor.

Prince Harry has safeguarded his periodic use of private jets to ensure his family's safety, and has actually stated that on the unusual celebrations he does not fly commercially he offsets his emissions.

But planemakers state occurrences such as the furore over his itinerary have added fresh obstacles for a market already aiming to validate its contribution to cutting business expenses.

"Incidents of flight shaming involving using private jets are unfortunate when you consider that our industry has actually delivered fuel effectiveness enhancements of 40% over the previous 40 years," stated Bombardier Aviation President David Coleal.

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

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

Environmentalists and some analysts remain hesitant that biojetfuels, typically mixed 50-50 with kerosene, will make a considerable impact on public perceptions about luxury travel.

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

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

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

Corporate charter companies and experts are also seeing more interest from who desire to buy carbon credits to balance out emissions from their flights.

Brian Proctor, CEO of Mente Group, a U.S. consultancy, stated emissions played a function in a business jet usage study his company recently finished for a Fortune 500 company.

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