By Allison Lampert

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

Fuel producers and jetmakers are keen to display unique forms of air travel fuel considered less hazardous to the environment, from utilized cooking oil to the definitely less attractive meat waste.

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

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

The availability of less contaminating private jets might also spare the abundant and famous the unfavorable promotion experienced by Britain's Prince Harry and his spouse Meghan over a current private jet journey to southern France.

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

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

"All of our item is inedible."

Some of the other 79 airplane on screen are anticipated to be powered by 150,000 gallons of other sustainable fuel mixes expected to be pumped at the program.

FLIGHT SHAMING

Private jets represent less than 0.1% of total annual carbon emissions worldwide, but can discharge, on average, 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 protected his periodic use of private jets to ensure his household's security, and has actually stated that on the uncommon events he does not fly commercially he offsets his emissions.

But planemakers say occurrences such as the furore over his travel plan have actually added fresh difficulties for a market already making every effort to justify its contribution to cutting business costs.

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

Bombardier thinks increased sustainable fuel use will assist the industry make inroads with corporations and rich purchasers. According to market data, billionaires just have a 19% company jet ownership rate.

But even an image remodeling - with jets sporting stickers like "this airplane flies on renewable fuels" and organisers adding alternative fuel pumps for visiting planes - is not likely to please all critics at the Oct 22-24 luxury jet event.

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

"No amount of jatropha curcas or Brazil-nut fuel can make company jets look eco-friendly," said air travel analyst Richard Aboulafia.

Demand from business jet operators for sustainable fuels now far goes beyond supply and their interest might drive future production, Sherbacow stated.

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

Corporate charter business and consultants are likewise seeing more interest from consumers who want to purchase carbon credits to balance out emissions from their flights.

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

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