By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's most significant industry program in Las Vegas high-end jets are tempting buyers with their smooth silhouettes, luxurious cabins - and progressively, their use of alternative fuels.

Fuel producers and jetmakers are keen to display unique kinds of air travel fuel considered less harmful to the climate, from used cooking oil to the noticeably less attractive meat waste.

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

Their hope is that adopting sustainable fuel to curb emissions might make service jets more appealing to ecologically mindful purchasers - specifically corporations facing questions over sustainability from shareholders or green project groups.

The availability of less polluting private jets could also spare the abundant and well-known the negative promotion experienced by Britain's Prince Harry and his partner Meghan over a current personal jet journey to southern France.

Five Gulfstream jets on display screen in Las Vegas are utilizing 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, chief industrial officer of Boston-based biofuel manufacturer World Energy, which produces fuel from meat waste utilized by Gulfstream.

"All of our item is inedible."

A few of the other 79 airplane on display are anticipated to be powered by 150,000 gallons of other renewable fuel mixes anticipated to be pumped at the show.

FLIGHT SHAMING

Private jets account for less than 0.1% of total annual carbon emissions globally, however can release, usually, approximately 20 times more carbon emissions per passenger mile than jetliners, according to the London-based private charter firm Victor.

Prince Harry has actually defended his periodic use of personal jets to ensure his family's security, and has stated that on the rare celebrations he does not fly commercially he offsets his emissions.

But planemakers say events such as the furore over his schedule have included fresh obstacles for an industry currently aiming to validate its contribution to cutting business expenses.

"Incidents of flight shaming including the use of private jets are unfortunate when you consider that our market has actually provided fuel effectiveness enhancements of 40% over the previous 40 years," said Bombardier Aviation President David Coleal.

Bombardier thinks increased sustainable fuel usage will help the market make inroads with corporations and wealthy purchasers. According to industry information, billionaires just have a 19% company jet ownership rate.

But even an image makeover - with jets sporting sticker labels like "this aircraft flies on sustainable fuels" and organisers including alternative fuel pumps for checking out planes - is not likely to satisfy all critics at the Oct 22-24 high-end jet occasion.

Environmentalists and some analysts stay skeptical that biojetfuels, typically mixed 50-50 with kerosene, will make a considerable impact on public perceptions about luxury travel.

"No quantity of Jatropha or Brazil-nut fuel can make service jets look eco-friendly," said air travel analyst Richard Aboulafia.

Demand from company jet operators for renewable fuels now far exceeds 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 and experts are likewise seeing more interest from clients who want 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 function in a business jet usage research study his business recently completed for a Fortune 500 business.

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