By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's most significant market program in Las Vegas high-end jets are tempting purchasers with their sleek silhouettes, - and progressively, their usage of alternative fuels.

Fuel producers and jetmakers are eager to showcase novel forms of aviation fuel deemed less harmful to the environment, 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 embracing renewable fuel to suppress emissions could make service jets more appealing to environmentally mindful purchasers - specifically corporations facing questions over sustainability from shareholders or green project groups.

The availability of less contaminating personal jets might also spare the abundant and well-known the negative promotion experienced by Britain's Prince Harry and his other half Meghan over a current private jet trip to southern France.

Five Gulfstream jets on 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 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 expected to be pumped at the program.

FLIGHT SHAMING

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

Prince Harry has defended his periodic use of private jets to ensure his household's security, and has said 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 included fresh obstacles for an industry already striving to justify its contribution to cutting business costs.

"Incidents of flight shaming involving making use of personal jets are regrettable when you think about that our market has provided fuel efficiency enhancements of 40% over the past 40 years," said Bombardier Aviation President David Coleal.

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

But even an image makeover - with jets sporting stickers like "this aircraft flies on eco-friendly fuels" and organisers including alternative fuel pumps for visiting aircrafts - is unlikely to please all critics at the Oct 22-24 luxury jet occasion.

Environmentalists and some experts remain doubtful that biojetfuels, normally blended 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 service jets look eco-friendly," stated air travel expert Richard Aboulafia.

Demand from company 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 business and consultants are likewise seeing more interest from clients who desire 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 utilization study his company recently finished for a Fortune 500 company.

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