By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's biggest market show in Las Vegas high-end jets are tempting purchasers with their sleek silhouettes, luxurious cabins - and significantly, their usage of alternative fuels.

Fuel producers and jetmakers are keen to showcase novel forms of air travel fuel considered less hazardous to the environment, from used cooking oil to the distinctly less glamorous meat waste.

Business jet operators, like airlines, have acquiesced ecological pressure on air travel and dedicated to halving carbon emissions by 2050 compared with 2005.

Their hope is that adopting renewable fuel to curb emissions might make company jets more attractive to ecologically conscious buyers - especially corporations facing over sustainability from shareholders or green campaign groups.

The availability of less contaminating private jets could also spare the rich and well-known the negative promotion experienced by Britain's Prince Harry and his other half Meghan over a recent private jet journey to southern France.

Five Gulfstream jets on display 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 by-products of the food industry," said Bryan Sherbacow, chief industrial 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 airplane on display screen are expected to be powered by 150,000 gallons of other sustainable fuel blends expected to be pumped at the program.

FLIGHT SHAMING

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

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

But planemakers say incidents such as the furore over his schedule have included fresh challenges for an industry already aiming to validate its contribution to cutting business expenses.

"Incidents of flight shaming involving making use of personal jets are unfortunate when you think about that our market 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 industry make inroads with corporations and wealthy buyers. According to market data, billionaires only have a 19% business jet ownership rate.

But even an image remodeling - with jets sporting sticker labels like "this airplane flies on eco-friendly fuels" and organisers including alternative fuel pumps for checking out airplanes - is unlikely to please all critics at the Oct 22-24 high-end jet occasion.

Environmentalists and some analysts remain hesitant that biojetfuels, normally mixed 50-50 with kerosene, will make a considerable effect on public perceptions about luxury travel.

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

Demand from business jet operators for renewable fuels now far exceeds 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 as much as 150 million gallons by 2022.

Corporate charter business and consultants are likewise seeing more interest from clients who wish to buy carbon credits to offset emissions from their flights.

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

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