By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's most significant industry show in Las Vegas luxury jets are enticing buyers with their sleek silhouettes, plush cabins - and progressively, their usage of alternative fuels.

Fuel producers and jetmakers are keen to display novel kinds of air travel fuel deemed less harmful to the environment, from used cooking oil to the definitely less glamorous meat waste.

Business jet operators, like airline companies, have actually bowed to ecological pressure on air travel and devoted to cutting in half carbon emissions by 2050 compared to 2005.

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

The accessibility of less contaminating personal jets could also spare the rich and famous the unfavorable promotion experienced by Britain's Prince Harry and his better half Meghan over a recent private jet trip 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 consist of "fats, grease and oils that are byproducts of the food industry," stated Bryan Sherbacow, chief commercial officer of Boston-based biofuel producer World Energy, which produces fuel from meat waste used by Gulfstream.

"All of our item is inedible."

Some of the other 79 aircraft on screen are expected to be powered by 150,000 gallons of other sustainable fuel mixes anticipated to be pumped at the program.

FLIGHT SHAMING

Private jets account for less than 0.1% of total annual carbon emissions worldwide, however can release, on average, as much as 20 times more carbon emissions per traveler mile than jetliners, according to the London-based personal charter firm Victor.

Prince Harry has safeguarded his periodic use of private jets to ensure his family's security, and has actually said that on the uncommon events he does not fly commercially he offsets his emissions.

But planemakers state occurrences such as the furore over his schedule have added fresh obstacles for a market currently making every effort to validate its contribution to cutting business expenses.

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

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

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

Environmentalists and some analysts stay skeptical that biojetfuels, usually combined 50-50 with kerosene, will make a significant effect on public perceptions about luxury travel.

"No amount of Jatropha or Brazil-nut fuel can make organization jets look eco-friendly," said air travel expert 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 companies and consultants are also 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, said emissions contributed in a corporate jet usage research study his company just recently completed for a Fortune 500 business.

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