By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's greatest industry program in Las Vegas luxury jets are drawing purchasers with their sleek shapes, plush cabins - and increasingly, their use of alternative fuels.

Fuel producers and jetmakers are eager to types of air travel fuel deemed less damaging 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 aviation and devoted to halving carbon emissions by 2050 compared to 2005.

Their hope is that embracing eco-friendly fuel to suppress emissions might make service jets more attractive to environmentally conscious buyers - especially corporations dealing with concerns over sustainability from shareholders or green campaign groups.

The availability of less contaminating private jets might also spare the abundant and popular the unfavorable promotion experienced by Britain's Prince Harry and his better half Meghan over a recent personal 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 industry," said Bryan Sherbacow, chief commercial officer of Boston-based biofuel producer World Energy, which produces fuel from meat waste utilized by Gulfstream.

"All of our product is inedible."

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

FLIGHT SHAMING

Private jets account for less than 0.1% of overall annual carbon emissions globally, but can release, usually, up to 20 times more carbon emissions per guest mile than jetliners, according to the London-based private charter firm Victor.

Prince Harry has actually safeguarded his periodic usage of private jets to ensure his household's security, and has stated that on the uncommon celebrations he does not fly commercially he offsets his emissions.

But planemakers say incidents such as the furore over his itinerary have actually included fresh difficulties for a market currently striving to justify its contribution to cutting business costs.

"Incidents of flight shaming including using private jets are regrettable when you think about that our industry has actually delivered fuel effectiveness enhancements of 40% over the past 40 years," said Bombardier Aviation President David Coleal.

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

But even an image transformation - with jets sporting sticker labels like "this airplane flies on eco-friendly fuels" and organisers including alternative fuel pumps for checking out planes - is unlikely to please all critics at the Oct 22-24 high-end jet occasion.

Environmentalists and some analysts stay doubtful that biojetfuels, typically blended 50-50 with kerosene, will make a significant impact on public understandings about high-end travel.

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

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

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

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

Brian Proctor, CEO of Mente Group, a U.S. consultancy, said emissions played a function in a corporate jet utilization study his business just recently finished for a Fortune 500 business.

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