By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's greatest market show in Las Vegas luxury jets are enticing buyers with their streamlined shapes, luxurious cabins - and significantly, their usage of alternative fuels.

Fuel producers and jetmakers are eager to display novel kinds of air travel fuel deemed less harmful to the climate, from utilized cooking oil to the noticeably less glamorous meat waste.

Business jet operators, like airline companies, have acquiesced environmental pressure on air travel and devoted to halving carbon emissions by 2050 compared to 2005.

Their hope is that adopting sustainable fuel to curb emissions might make business jets more appealing to environmentally conscious purchasers - especially corporations facing questions over sustainability from shareholders or green campaign groups.

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

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

The most recent waste-based fuels consist of "fats, grease and oils that are by-products of the food industry," said Bryan Sherbacow, chief industrial officer of Boston-based biofuel producer World Energy, which produces fuel from meat waste used by Gulfstream.

"All of our item is inedible."

A few of the other 79 airplane on display are expected to be powered by 150,000 gallons of other sustainable fuel blends expected to be pumped at the program.

FLIGHT SHAMING

Private jets represent less than 0.1% of total yearly carbon emissions internationally, but can discharge, on average, up to 20 times more carbon emissions per guest 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 family's security, and has actually said that on the unusual events he does not fly commercially he offsets his emissions.

But planemakers state occurrences such as the furore over his schedule have included fresh difficulties for a market currently aiming to validate its contribution to cutting business costs.

"Incidents of flight shaming involving using personal jets are regrettable when you consider that our industry has actually delivered fuel performance enhancements of 40% over the previous 40 years," said Bombardier Aviation President David Coleal.

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

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

Environmentalists and some experts remain hesitant that biojetfuels, usually mixed 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 service jets look eco-friendly," stated aviation expert Richard Aboulafia.

Demand from company jet operators for eco-friendly fuels now far goes beyond supply and their interest could drive future production, Sherbacow said.

World Energy, which produces 40 million gallons of biofuel at its California plant, might broaden production up to 150 million gallons by 2022.

Corporate charter business and specialists are also seeing more interest from consumers who want to purchase carbon credits to offset emissions from their flights.

Brian Proctor, CEO of Mente Group, a U.S. consultancy, said emissions played a function in a business jet usage research study his business recently completed for a Fortune 500 .

"At the end of the day, I believe that rate, expense per hour, variety, speed and performance, that's still the (sales) motorist. But I think people are becoming more knowledgeable about the sustainability of operations and how it impacts the planet." (Reporting By Allison Lampert, Editing by Tim Hepher and Alexandra Hudson)