By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's most significant market program in Las Vegas high-end jets are tempting purchasers with their sleek shapes, luxurious cabins - and progressively, their use of alternative fuels.

Fuel producers and jetmakers are eager to showcase novel types of aviation fuel deemed less harmful to the environment, from used 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 committed to cutting in half carbon emissions by 2050 compared with 2005.

Their hope is that adopting renewable fuel to curb emissions might make business jets more appealing to environmentally mindful buyers - especially corporations dealing with questions over sustainability from investors or green project groups.

The schedule of less contaminating private jets could also spare the rich and famous the negative publicity experienced by Britain's Prince Harry and his wife Meghan over a current 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 current waste-based fuels include "fats, grease and oils that are by-products of the food market," 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 product is inedible."

Some of the other 79 airplane on display are expected to be powered by 150,000 gallons of other renewable fuel blends anticipated to be pumped at the .

FLIGHT SHAMING

Private jets account for less than 0.1% of overall yearly carbon emissions globally, but can give off, typically, 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 periodic usage of personal jets to guarantee his family's security, and has said that on the rare events he does not fly commercially he offsets his emissions.

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

"Incidents of flight shaming involving making use of personal jets are unfortunate when you consider that our market has actually provided fuel performance enhancements 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 rich buyers. According to industry information, billionaires only have a 19% company jet ownership rate.

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

Environmentalists and some analysts stay skeptical that biojetfuels, usually mixed 50-50 with kerosene, will make a substantial influence on public understandings about high-end travel.

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

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

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

Corporate charter business and specialists are also seeing more interest from clients who wish to purchase carbon credits to balance out emissions from their flights.

Brian Proctor, CEO of Mente Group, a U.S. consultancy, stated emissions contributed in a corporate jet usage research study his business just recently finished for a Fortune 500 company.

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