By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's greatest market show in Las Vegas high-end jets are enticing purchasers with their sleek shapes, plush cabins - and significantly, their usage of alternative fuels.

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

Business jet operators, like airline companies, have actually acquiesced ecological pressure on air travel and committed to halving carbon emissions by 2050 compared with 2005.

Their hope is that embracing renewable fuel to curb emissions could make service jets more attractive to ecologically mindful buyers - particularly corporations dealing with questions over sustainability from shareholders or green project groups.

The accessibility of less contaminating personal jets might also spare the rich and well-known the unfavorable promotion experienced by Britain's Prince Harry and his spouse Meghan over a recent personal jet journey to southern France.

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

The most recent waste-based fuels include "fats, grease and oils that are byproducts of the food industry," said Bryan Sherbacow, primary commercial officer of Boston-based biofuel manufacturer World Energy, which produces fuel from meat waste utilized by Gulfstream.

"All of our item is inedible."

Some of the other 79 airplane on display screen are anticipated to be powered by 150,000 gallons of other eco-friendly fuel mixes anticipated to be pumped at the show.

FLIGHT SHAMING

Private jets represent less than 0.1% of total yearly carbon emissions globally, however can emit, typically, up to 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 usage of private jets to guarantee his household's security, and has 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 actually included fresh difficulties for a market currently striving to justify its contribution to cutting corporate expenses.

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

Bombardier believes increased sustainable fuel use will help the industry make inroads with corporations and wealthy buyers. According to industry data, billionaires only have a 19% company 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 going to planes - is unlikely to satisfy all critics at the Oct 22-24 luxury jet event.

Environmentalists and some experts stay doubtful that biojetfuels, usually mixed 50-50 with kerosene, will make a substantial effect on public understandings about luxury travel.

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

Demand from business jet operators for eco-friendly fuels now far 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 approximately 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, stated emissions played a role in a business jet utilization study his business recently finished for a Fortune 500 company.

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