By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's most significant market program in Las Vegas high-end jets are luring buyers with their sleek shapes, plush cabins - and significantly, their use of alternative fuels.

Fuel producers and jetmakers are keen to display unique types of aviation fuel considered less damaging to the environment, from used cooking oil to the clearly less attractive meat waste.

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

Their hope is that embracing sustainable fuel to curb emissions might make organization jets more attractive to ecologically mindful purchasers - especially corporations facing questions over sustainability from investors or green project groups.

The availability of less polluting private jets might likewise spare the abundant and popular the negative publicity experienced by Britain's Prince Harry and his wife Meghan over a recent private jet journey to southern France.

Five Gulfstream jets on display 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 market," said Bryan Sherbacow, chief business officer of Boston-based biofuel producer World Energy, which produces fuel from meat waste utilized by Gulfstream.

"All of our product is inedible."

Some of the other 79 aircraft on screen are expected to be powered by 150,000 gallons of other renewable fuel blends expected to be pumped at the program.

FLIGHT SHAMING

Private jets account for less than 0.1% of overall yearly carbon emissions internationally, but can emit, on average, up to 20 times more carbon emissions per traveler mile than jetliners, according to the London-based private Victor.

Prince Harry has actually protected his occasional use of private jets to ensure his family's security, and has said that on the rare events he does not fly commercially he offsets his emissions.

But planemakers say occurrences such as the furore over his schedule have actually included fresh difficulties for a market currently striving to validate its contribution to cutting corporate expenses.

"Incidents of flight shaming including using personal jets are unfortunate when you consider that our market has provided fuel efficiency enhancements of 40% over the previous 40 years," stated Bombardier Aviation President David Coleal.

Bombardier thinks increased sustainable fuel use will help the market make inroads with corporations and rich buyers. According to industry data, billionaires only have a 19% business jet ownership rate.

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

Environmentalists and some analysts remain doubtful that biojetfuels, typically mixed 50-50 with kerosene, will make a significant 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 expert Richard Aboulafia.

Demand from service jet operators for renewable fuels now far surpasses supply and their interest could drive future production, Sherbacow stated.

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 consultants are likewise seeing more interest from consumers who wish to buy carbon credits to balance out emissions from their flights.

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

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