By Allison Lampert

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

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

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

Their hope is that embracing eco-friendly fuel to suppress emissions could make business jets more attractive to environmentally conscious purchasers - especially corporations facing concerns over sustainability from investors or green campaign groups.

The schedule of less contaminating personal jets could likewise spare the rich and popular the unfavorable promotion experienced by Britain's Prince Harry and his better half 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 consist of "fats, grease and oils that are by-products of the food market," stated Bryan Sherbacow, primary commercial officer of Boston-based biofuel manufacturer World Energy, which produces fuel from meat waste used by Gulfstream.

"All of our item is inedible."

A few of the other 79 aircraft on 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 globally, however can give off, usually, as much as 20 times more carbon emissions per traveler mile than jetliners, according to the London-based private charter company Victor.

Prince Harry has protected his periodic use of private jets to ensure his family's security, 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 travel plan have added fresh difficulties for an industry already striving to justify its contribution to cutting business costs.

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

But even an image transformation - with jets sporting stickers like "this airplane flies on renewable fuels" and organisers including alternative fuel pumps for going to airplanes - is not likely to satisfy all critics at the Oct 22-24 high-end jet event.

Environmentalists and some analysts stay hesitant that biojetfuels, generally blended 50-50 with kerosene, will make a substantial influence on public perceptions about luxury travel.

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

Demand from business jet operators for sustainable fuels now far goes beyond supply and their interest could 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 experts are likewise seeing more interest from customers who wish to purchase carbon credits to offset emissions from their flights.

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

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