By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's greatest industry program in Las Vegas luxury jets are enticing purchasers with their smooth shapes, luxurious cabins - and increasingly, their use of alternative fuels.

Fuel manufacturers and jetmakers are eager to display novel types 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 airlines, have actually bowed to ecological pressure on air travel and dedicated to cutting in half carbon emissions by 2050 compared with 2005.

Their hope is that adopting sustainable fuel to suppress emissions might make business jets more attractive to ecologically mindful buyers - specifically corporations facing concerns over sustainability from shareholders or green campaign groups.

The schedule of less polluting personal jets could also spare the rich and popular the negative promotion experienced by Britain's Prince Harry and his wife Meghan over a recent private 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 byproducts of the food market," stated Bryan Sherbacow, primary 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 aircraft on screen are expected to be powered by 150,000 gallons of other sustainable fuel blends anticipated to be pumped at the show.

FLIGHT SHAMING

Private jets account for less than 0.1% of total yearly carbon emissions internationally, however can discharge, typically, as much as 20 times more carbon emissions per passenger mile than jetliners, according to the London-based personal charter company Victor.

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

But planemakers state occurrences such as the furore over his schedule have actually added fresh obstacles for an industry already making every effort to justify its contribution to cutting business costs.

"Incidents of flight shaming involving making use of private jets are unfortunate when you think about that our industry has provided fuel performance improvements of 40% over the previous 40 years," said Bombardier Aviation President David Coleal.

Bombardier believes increased sustainable fuel use will help the industry make inroads with corporations and wealthy buyers. According to industry information, billionaires just 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 airplanes - is unlikely to please all critics at the Oct 22-24 high-end jet occasion.

Environmentalists and some experts stay doubtful that biojetfuels, generally blended 50-50 with kerosene, will make a considerable influence on public perceptions about .

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

Demand from organization jet operators for eco-friendly 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 broaden production up to 150 million gallons by 2022.

Corporate charter companies and experts are also seeing more interest from clients who wish to purchase carbon credits to balance out emissions from their flights.

Brian Proctor, CEO of Mente Group, a U.S. consultancy, stated emissions contributed in a business jet usage study his business recently completed for a Fortune 500 company.

"At the end of the day, I think that rate, cost per hour, range, speed and performance, that's still the (sales) chauffeur. But I believe individuals are becoming more mindful of the sustainability of operations and how it affects the planet." (Reporting By Allison Lampert, Editing by Tim Hepher and Alexandra Hudson)