By Allison Lampert

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

Fuel manufacturers and jetmakers are keen to display novel kinds of air travel fuel deemed less harmful to the climate, from used cooking oil to the noticeably less attractive meat waste.

Business jet operators, like airlines, have acquiesced environmental pressure on aviation and devoted to cutting in half carbon emissions by 2050 compared to 2005.

Their hope is that embracing eco-friendly fuel to curb emissions could make business jets more attractive to environmentally mindful purchasers - especially corporations dealing with concerns over sustainability from investors or green project groups.

The availability of less contaminating private jets could likewise spare the abundant and famous the unfavorable publicity 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 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 by-products of the food industry," said Bryan Sherbacow, primary commercial officer of Boston-based biofuel manufacturer World Energy, which produces fuel from meat waste utilized by Gulfstream.

"All of our product is inedible."

A few of the other 79 airplane on screen are expected to be powered by 150,000 gallons of other sustainable fuel blends anticipated to be pumped at the program.

FLIGHT SHAMING

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

Prince Harry has actually safeguarded his occasional use of personal jets to guarantee his household's security, and has actually said that on the unusual celebrations he does not fly commercially he offsets his emissions.

But planemakers state events such as the furore over his itinerary have actually included fresh obstacles for an industry currently striving to validate its to cutting corporate expenses.

"Incidents of flight shaming involving the use of private jets are regrettable when you consider that our market has provided fuel performance improvements of 40% over the past 40 years," said Bombardier Aviation President David Coleal.

Bombardier believes increased sustainable fuel use will help the market make inroads with corporations and wealthy buyers. According to market information, billionaires only have a 19% service 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 visiting airplanes - is unlikely to please all critics at the Oct 22-24 high-end jet event.

Environmentalists and some analysts stay doubtful that biojetfuels, normally mixed 50-50 with kerosene, will make a substantial effect on public perceptions about high-end travel.

"No quantity of jatropha curcas or Brazil-nut fuel can make business jets look eco-friendly," stated air travel expert Richard Aboulafia.

Demand from organization jet operators for eco-friendly fuels now far surpasses 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 as much as 150 million gallons by 2022.

Corporate charter business and consultants are likewise seeing more interest from customers who want 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 company recently finished for a Fortune 500 business.

"At the end of the day, I believe that rate, expense per hour, variety, speed and efficiency, that's still the (sales) motorist. But I think 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)