By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's most significant industry show in Las Vegas luxury jets are enticing purchasers with their smooth silhouettes, luxurious cabins - and significantly, their usage of alternative fuels.

Fuel producers and jetmakers are eager to showcase novel types of aviation fuel considered less damaging to the climate, from used cooking oil to the clearly less attractive meat waste.

Business jet operators, like airline companies, have actually acquiesced environmental 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 could make organization jets more attractive to ecologically mindful buyers - particularly corporations dealing with questions over sustainability from investors or green project groups.

The schedule of less contaminating private jets could also spare the rich and well-known the unfavorable publicity experienced by Britain's Prince Harry and his wife Meghan over a current personal jet journey to southern France.

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

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

"All of our product is inedible."

Some of the other 79 airplane on display screen 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 represent less than 0.1% of total yearly carbon emissions internationally, but can emit, usually, approximately 20 times more carbon emissions per passenger mile than jetliners, according to the London-based personal charter Victor.

Prince Harry has defended his occasional usage of private jets to ensure his household's safety, and has said that on the unusual events he does not fly commercially he offsets his emissions.

But planemakers say occurrences such as the furore over his schedule have added fresh challenges for an industry currently making every effort to validate its contribution to cutting corporate expenses.

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

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

But even an image makeover - with jets sporting sticker labels like "this aircraft flies on eco-friendly fuels" and organisers adding alternative fuel pumps for visiting airplanes - is not likely to satisfy all critics at the Oct 22-24 luxury jet event.

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

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

Demand from business jet operators for eco-friendly fuels now far goes beyond supply and their interest could drive future production, Sherbacow stated.

World Energy, which produces 40 million gallons of biofuel at its California plant, could broaden production up to 150 million gallons by 2022.

Corporate charter business and experts are also seeing more interest from customers who wish to purchase carbon credits to offset emissions from their flights.

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

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