By Allison Lampert

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

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

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

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

The accessibility of less contaminating private jets might likewise spare the abundant and the unfavorable publicity experienced by Britain's Prince Harry and his other half Meghan over a recent personal jet trip 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 consist of "fats, grease and oils that are byproducts of the food market," stated Bryan Sherbacow, primary commercial officer of Boston-based biofuel producer World Energy, which produces fuel from meat waste utilized by Gulfstream.

"All of our product is inedible."

A few of the other 79 airplane on display 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 total yearly carbon emissions globally, but can discharge, typically, as much as 20 times more carbon emissions per passenger mile than jetliners, according to the London-based personal charter firm Victor.

Prince Harry has defended his occasional use of private jets to guarantee his household's security, and has 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 actually added fresh challenges for a market currently making every effort to justify its contribution to cutting business costs.

"Incidents of flight shaming including making use of personal jets are unfortunate when you consider that our industry has actually delivered fuel efficiency improvements of 40% over the previous 40 years," stated Bombardier Aviation President David Coleal.

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

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

Environmentalists and some experts remain skeptical that biojetfuels, generally combined 50-50 with kerosene, will make a substantial influence on public perceptions about high-end travel.

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

Demand from service jet operators for eco-friendly 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 consultants are also seeing more interest from customers who want to purchase carbon credits to offset emissions from their flights.

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

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