By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's greatest industry show in Las Vegas luxury jets are drawing buyers with their streamlined silhouettes, plush cabins - and significantly, their use of alternative fuels.

Fuel producers and jetmakers are keen to showcase novel forms of air travel fuel deemed less hazardous to the environment, from utilized cooking oil to the definitely less attractive meat waste.

Business jet operators, like airlines, have bowed to environmental pressure on aviation and committed to halving carbon emissions by 2050 compared to 2005.

Their hope is that adopting sustainable fuel to suppress emissions might make service jets more attractive to environmentally conscious buyers - especially corporations facing concerns over sustainability from shareholders or green project groups.

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

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

The current waste-based fuels include "fats, grease and oils that are by-products of the food industry," stated Bryan Sherbacow, primary business officer of Boston-based biofuel World Energy, which produces fuel from meat waste used by Gulfstream.

"All of our product is inedible."

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

FLIGHT SHAMING

Private jets represent less than 0.1% of total annual carbon emissions internationally, however can produce, typically, approximately 20 times more carbon emissions per passenger mile than jetliners, according to the London-based personal charter company Victor.

Prince Harry has safeguarded his occasional use of personal jets to guarantee his family's security, and has said that on the rare events 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 an industry already striving to justify its contribution to cutting business costs.

"Incidents of flight shaming involving making use of personal jets are unfortunate when you consider 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 assist the industry make inroads with corporations and rich purchasers. According to industry information, billionaires only have a 19% business jet ownership rate.

But even an image makeover - with jets sporting sticker labels like "this airplane flies on renewable fuels" and organisers including alternative fuel pumps for visiting aircrafts - is unlikely to please all critics at the Oct 22-24 luxury jet occasion.

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

"No quantity of jatropha curcas or Brazil-nut fuel can make service jets look eco-friendly," said aviation analyst Richard Aboulafia.

Demand from service jet operators for eco-friendly fuels now far surpasses supply and their interest might drive future production, Sherbacow said.

World Energy, which produces 40 million gallons of biofuel at its California plant, could expand production as much as 150 million gallons by 2022.

Corporate charter business and specialists are also 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, said emissions played a function in a corporate jet utilization study his business recently completed for a Fortune 500 company.

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