By Allison Lampert

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

Fuel producers and jetmakers are eager to display novel kinds of air travel fuel considered less hazardous to the environment, from used cooking oil to the noticeably less attractive meat waste.

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

Their hope is that adopting eco-friendly fuel to suppress emissions could make service jets more attractive to environmentally conscious purchasers - particularly corporations facing questions over sustainability from shareholders or green campaign groups.

The schedule of less polluting personal jets could likewise spare the rich and famous the unfavorable publicity experienced by Britain's Prince Harry and his other half Meghan over a recent trip to southern France.

Five Gulfstream jets on 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 industry," stated Bryan Sherbacow, chief business officer of Boston-based biofuel producer World Energy, which produces fuel from meat waste used by Gulfstream.

"All of our item is inedible."

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

FLIGHT SHAMING

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

Prince Harry has protected his occasional usage of personal jets to ensure his household's safety, and has actually stated that on the uncommon events he does not fly commercially he offsets his emissions.

But planemakers say occurrences such as the furore over his schedule have actually added fresh challenges for an industry currently aiming to validate its contribution to cutting business expenses.

"Incidents of flight shaming including the usage of personal jets are unfortunate when you think about that our industry has actually delivered fuel efficiency improvements of 40% over the past 40 years," said Bombardier Aviation President David Coleal.

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

But even an image makeover - with jets sporting stickers like "this airplane flies on sustainable fuels" and organisers including alternative fuel pumps for checking out airplanes - is unlikely to please all critics at the Oct 22-24 luxury jet event.

Environmentalists and some analysts stay hesitant that biojetfuels, typically blended 50-50 with kerosene, will make a significant effect on public understandings about luxury travel.

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

Demand from service jet operators for sustainable 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, might expand production approximately 150 million gallons by 2022.

Corporate charter companies and experts are likewise seeing more interest from consumers who desire to buy carbon credits to offset emissions from their flights.

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

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