By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's most significant market program in Las Vegas high-end jets are tempting buyers with their smooth silhouettes, luxurious cabins - and increasingly, their usage of alternative fuels.

Fuel manufacturers and jetmakers are keen to display unique forms of aviation fuel deemed less hazardous to the environment, from utilized cooking oil to the distinctly less glamorous meat waste.

Business jet operators, like airline companies, have acquiesced ecological pressure on aviation and dedicated to halving carbon emissions by 2050 compared with 2005.

Their hope is that adopting eco-friendly fuel to curb emissions could make company jets more attractive to ecologically conscious 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 rich and well-known the unfavorable publicity experienced by Britain's Prince Harry and his wife Meghan over a recent personal jet trip to southern France.

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

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

"All of our item is inedible."

A few of the other 79 airplane on display screen are expected 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 annual carbon emissions internationally, but can give off, typically, as much as 20 times more carbon emissions per guest mile than jetliners, according to the London-based personal charter company Victor.

Prince Harry has defended his occasional use of personal jets to ensure his family's safety, and has 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 have actually added fresh difficulties for a market already aiming to validate its contribution to cutting corporate costs.

"Incidents of flight shaming including making use of personal jets are regrettable when you consider that our industry has delivered fuel performance improvements of 40% over the previous 40 years," said Bombardier Aviation President David Coleal.

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

But even an image transformation - with jets sporting stickers like "this aircraft flies on sustainable fuels" and organisers adding alternative fuel pumps for visiting aircrafts - is not likely to please all critics at the Oct 22-24 luxury jet occasion.

Environmentalists and some experts stay hesitant that biojetfuels, normally blended 50-50 with kerosene, will make a significant effect on public understandings about luxury travel.

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

Demand from company jet operators for sustainable fuels now far exceeds supply and their interest might drive future production, Sherbacow stated.

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 companies and consultants are also seeing more interest from consumers who want to purchase carbon credits to offset 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 business recently completed for a Fortune 500 business.

"At the end of the day, I believe that cost, expense per hour, range, speed and performance, that's still the (sales) driver. But I believe individuals are becoming more knowledgeable about the sustainability of operations and how it impacts the planet." (Reporting By Allison Lampert, Editing by Tim Hepher and Alexandra Hudson)