By Allison Lampert

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

Fuel producers and jetmakers are keen to showcase unique forms of deemed less damaging to the environment, from utilized cooking oil to the distinctly less glamorous meat waste.

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

Their hope is that adopting eco-friendly fuel to curb emissions could make company jets more appealing to environmentally conscious buyers - particularly corporations facing questions over sustainability from shareholders or green campaign groups.

The accessibility of less polluting personal jets might also spare the rich and well-known the negative 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 in Las Vegas are using California-produced fuel from inedible beef tallow.

The most current waste-based fuels consist of "fats, grease and oils that are by-products of the food market," said Bryan Sherbacow, primary business officer of Boston-based biofuel manufacturer World Energy, which produces fuel from meat waste used by Gulfstream.

"All of our product is inedible."

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

FLIGHT SHAMING

Private jets account for less than 0.1% of overall annual carbon emissions internationally, however can release, usually, as much as 20 times more carbon emissions per traveler mile than jetliners, according to the London-based private charter firm Victor.

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

But planemakers state incidents such as the furore over his travel plan have included fresh challenges for a market already aiming to justify its contribution to cutting business expenses.

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

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

But even an image remodeling - with jets sporting sticker labels like "this airplane flies on sustainable fuels" and organisers including alternative fuel pumps for checking out aircrafts - is not likely to satisfy all critics at the Oct 22-24 luxury jet event.

Environmentalists and some analysts stay skeptical that biojetfuels, typically combined 50-50 with kerosene, will make a substantial influence on public understandings about high-end travel.

"No amount of Jatropha or Brazil-nut fuel can make company jets look eco-friendly," stated air travel expert Richard Aboulafia.

Demand from service jet operators for sustainable 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 broaden production approximately 150 million gallons by 2022.

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

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

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