By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's biggest industry show in Las Vegas high-end jets are luring buyers with their sleek silhouettes, plush cabins - and progressively, their usage of alternative fuels.

Fuel producers and jetmakers are keen to display unique types of aviation fuel considered less harmful to the environment, from used cooking oil to the definitely less glamorous meat waste.

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

Their hope is that adopting renewable fuel to curb emissions might make organization jets more attractive to environmentally conscious purchasers - particularly corporations dealing with concerns over sustainability from investors or green project groups.

The availability of less contaminating private jets might likewise spare the rich and popular the unfavorable promotion experienced by Britain's Prince Harry and his wife Meghan over a recent personal jet trip to southern France.

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

"All of our product is inedible."

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

FLIGHT SHAMING

Private jets represent less than 0.1% of overall annual carbon emissions worldwide, but can release, typically, approximately 20 times more carbon emissions per guest mile than jetliners, according to the London-based private charter firm Victor.

Prince Harry has defended his occasional usage of private jets to ensure his family's security, and has stated that on the unusual occasions he does not fly commercially he offsets his emissions.

But planemakers state occurrences such as the furore over his itinerary have actually added fresh challenges for a market already aiming to validate its contribution to cutting corporate expenses.

"Incidents of flight shaming involving using personal jets are regrettable when you think about that our market has actually provided fuel effectiveness improvements of 40% over the past 40 years," stated Bombardier Aviation President David Coleal.

Bombardier believes increased sustainable fuel usage will assist the market make inroads with corporations and wealthy buyers. According to market data, billionaires only have a 19% service jet ownership rate.

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

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

"No amount of Jatropha or Brazil-nut fuel can make service jets look eco-friendly," said aviation expert Richard Aboulafia.

Demand from organization jet operators for 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 approximately 150 million gallons by 2022.

Corporate charter companies and experts are also seeing more interest from consumers who want to buy carbon credits to balance out emissions from their flights.

Brian Proctor, CEO of Mente Group, a U.S. consultancy, said emissions contributed in a corporate jet utilization research study his business just 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) chauffeur. But I think individuals are ending up being more knowledgeable about the sustainability of operations and how it impacts the world." (Reporting By Allison Lampert, Editing by Tim Hepher and Alexandra Hudson)