By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's most significant market program in Las Vegas luxury jets are tempting buyers with their sleek silhouettes, plush cabins - and increasingly, their use of alternative fuels.

Fuel producers and jetmakers are keen to showcase unique types of aviation fuel considered less damaging to the environment, from used cooking oil to the clearly less waste.

Business jet operators, like airline companies, have bowed to ecological pressure on aviation and dedicated to cutting in half carbon emissions by 2050 compared with 2005.

Their hope is that adopting renewable fuel to suppress emissions could make organization jets more appealing to environmentally mindful buyers - especially corporations facing questions over sustainability from investors or green campaign groups.

The availability of less polluting personal jets might also spare the rich and popular the unfavorable publicity experienced by Britain's Prince Harry and his spouse Meghan over a current private jet trip to southern France.

Five Gulfstream jets on 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 byproducts of the food market," stated Bryan Sherbacow, primary business officer of Boston-based biofuel manufacturer World Energy, which produces fuel from meat waste used 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 eco-friendly fuel blends anticipated to be pumped at the show.

FLIGHT SHAMING

Private jets represent less than 0.1% of overall annual carbon emissions worldwide, but can give off, usually, 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 actually safeguarded his occasional use of personal jets to ensure his family's security, and has actually said that on the rare celebrations he does not fly commercially he offsets his emissions.

But planemakers state events such as the furore over his travel plan have included fresh difficulties for a market already aiming to justify 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 delivered fuel efficiency improvements of 40% over the previous 40 years," stated Bombardier Aviation President David Coleal.

Bombardier thinks increased sustainable fuel usage will help the industry make inroads with corporations and wealthy purchasers. According to market information, billionaires only have a 19% company jet ownership rate.

But even an image makeover - with jets sporting sticker labels like "this airplane flies on renewable fuels" and organisers including alternative fuel pumps for visiting aircrafts - is not likely to please all critics at the Oct 22-24 luxury jet event.

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

"No amount of jatropha curcas or Brazil-nut fuel can make service jets look eco-friendly," stated air travel analyst Richard Aboulafia.

Demand from service 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, could broaden production approximately 150 million gallons by 2022.

Corporate charter business and specialists are also seeing more interest from customers who wish to buy carbon credits to offset emissions from their flights.

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

"At the end of the day, I believe that rate, cost per hour, range, speed and performance, that's still the (sales) motorist. But I think people 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)