By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's greatest industry show in Las Vegas high-end jets are enticing buyers with their streamlined shapes, plush cabins - and progressively, their use of alternative fuels.

Fuel manufacturers and jetmakers are keen to showcase unique kinds of air travel fuel deemed less harmful to the environment, from used cooking oil to the definitely less glamorous meat waste.

Business jet operators, like airline companies, have acquiesced environmental pressure on aviation and committed to halving carbon by 2050 compared to 2005.

Their hope is that embracing eco-friendly fuel to suppress emissions might make company jets more attractive to ecologically conscious purchasers - especially corporations facing questions over sustainability from shareholders or green project groups.

The availability of less contaminating personal jets could also spare the abundant and popular the unfavorable promotion experienced by Britain's Prince Harry and his wife Meghan over a current personal jet trip to southern France.

Five Gulfstream jets on screen 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," said Bryan Sherbacow, primary commercial officer of Boston-based biofuel manufacturer World Energy, which produces fuel from meat waste used by Gulfstream.

"All of our product is inedible."

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

FLIGHT SHAMING

Private jets represent less than 0.1% of overall annual carbon emissions globally, but can produce, on average, approximately 20 times more carbon emissions per passenger mile than jetliners, according to the London-based private charter firm Victor.

Prince Harry has protected his periodic usage of personal jets to guarantee his family's safety, and has said that on the uncommon occasions he does not fly commercially he offsets his emissions.

But planemakers say events such as the furore over his travel plan have actually included fresh challenges for a market currently striving to validate its contribution to cutting business costs.

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

Bombardier believes increased sustainable fuel usage will help the market make inroads with corporations and rich purchasers. According to market data, billionaires only have a 19% company jet ownership rate.

But even an image transformation - with jets sporting stickers like "this aircraft flies on sustainable fuels" and organisers adding alternative fuel pumps for visiting airplanes - is unlikely to please all critics at the Oct 22-24 luxury jet event.

Environmentalists and some experts stay hesitant that biojetfuels, typically combined 50-50 with kerosene, will make a substantial influence on public perceptions about luxury travel.

"No quantity of Jatropha or Brazil-nut fuel can make company jets look eco-friendly," said aviation expert Richard Aboulafia.

Demand from organization jet operators for sustainable fuels now far exceeds supply and their interest could drive future production, Sherbacow said.

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 companies and specialists are also seeing more interest from customers who wish to buy carbon credits to balance out emissions from their flights.

Brian Proctor, CEO of Mente Group, a U.S. consultancy, said emissions played a role in a corporate jet utilization study his company just recently finished for a Fortune 500 company.

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