By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's greatest market program in Las Vegas high-end jets are tempting purchasers with their smooth silhouettes, luxurious cabins - and significantly, their use of alternative fuels.

Fuel producers and jetmakers are keen to showcase unique kinds of aviation fuel deemed less hazardous to the environment, from used cooking oil to the definitely less glamorous meat waste.

Business jet operators, like airline companies, have actually acquiesced environmental pressure on air travel and dedicated to cutting in half carbon emissions by 2050 compared with 2005.

Their hope is that embracing renewable fuel to curb emissions might make organization jets more attractive to ecologically mindful buyers - specifically corporations dealing with concerns over sustainability from investors or green project groups.

The accessibility of less polluting private jets could likewise spare the abundant and popular the negative publicity experienced by Britain's Prince Harry and his spouse Meghan over a recent private jet trip to southern France.

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

The most current waste-based fuels consist of "fats, grease and oils that are byproducts of the food market," said Bryan Sherbacow, primary business officer of Boston-based biofuel producer World Energy, which produces fuel from meat waste utilized by Gulfstream.

"All of our item is inedible."

Some 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 total annual carbon emissions internationally, however can give off, on average, as much as 20 times more carbon emissions per traveler mile than jetliners, according to the London-based personal charter firm Victor.

Prince Harry has actually defended his occasional usage of private jets to guarantee his household's security, and has actually stated that on the unusual occasions he does not fly commercially he offsets his emissions.

But planemakers say events such as the furore over his travel plan have added fresh difficulties for a market currently making every effort to validate its contribution to cutting corporate expenses.

"Incidents of flight shaming including the usage of personal jets are unfortunate when you consider that our industry has provided fuel efficiency enhancements of 40% over the previous 40 years," said President David Coleal.

Bombardier believes increased sustainable fuel usage will assist the market make inroads with corporations and wealthy buyers. According to market information, billionaires only have a 19% service jet ownership rate.

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

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

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

Demand from organization jet operators for renewable 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 as much as 150 million gallons by 2022.

Corporate charter business and experts are likewise seeing more interest from customers who desire to buy carbon credits to balance out emissions from their flights.

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

"At the end of the day, I believe that cost, cost per hour, variety, speed and efficiency, that's still the (sales) chauffeur. But I think people are becoming more familiar with the sustainability of operations and how it affects the world." (Reporting By Allison Lampert, Editing by Tim Hepher and Alexandra Hudson)