By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's biggest market program in Las Vegas luxury jets are luring purchasers with their smooth silhouettes, plush cabins - and increasingly, their usage of alternative fuels.

Fuel manufacturers and jetmakers are eager to showcase unique forms of aviation fuel deemed less harmful to the climate, from utilized cooking oil to the distinctly less attractive meat waste.

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

Their hope is that adopting eco-friendly fuel to suppress emissions might make service jets more attractive to ecologically mindful buyers - specifically corporations dealing with questions over sustainability from investors or green project groups.

The accessibility of less contaminating private jets could likewise spare the abundant and famous the unfavorable promotion experienced by Britain's Prince Harry and his other half Meghan over a current private jet trip to southern France.

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

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

"All of our item is inedible."

A few of the other 79 on screen are anticipated to be powered by 150,000 gallons of other eco-friendly fuel mixes anticipated to be pumped at the show.

FLIGHT SHAMING

Private jets represent less than 0.1% of total yearly carbon emissions globally, however can discharge, on average, approximately 20 times more carbon emissions per passenger mile than jetliners, according to the London-based personal charter firm Victor.

Prince Harry has defended his occasional use of private jets to ensure his family's safety, and has actually stated that on the rare celebrations he does not fly commercially he offsets his emissions.

But planemakers state occurrences such as the furore over his itinerary have added fresh difficulties for a market already striving to justify its contribution to cutting business costs.

"Incidents of flight shaming involving using personal jets are unfortunate when you consider that our market has delivered fuel performance improvements of 40% over the past 40 years," stated Bombardier Aviation President David Coleal.

Bombardier thinks increased sustainable fuel usage will help the market make inroads with corporations and rich purchasers. According to market information, billionaires just 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 including alternative fuel pumps for checking out airplanes - is unlikely to please all critics at the Oct 22-24 luxury jet occasion.

Environmentalists and some experts remain hesitant that biojetfuels, usually mixed 50-50 with kerosene, will make a considerable impact on public perceptions about high-end travel.

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

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

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

Corporate charter business and experts are likewise seeing more interest from customers who wish to buy carbon credits to balance out emissions from their flights.

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

"At the end of the day, I believe that price, cost per hour, variety, speed and performance, that's still the (sales) motorist. 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)