By Allison Lampert

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

Fuel producers and jetmakers are eager to showcase unique kinds of air travel fuel considered less harmful to the environment, from used cooking oil to the clearly less glamorous meat waste.

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

Their hope is that embracing eco-friendly fuel to suppress emissions could make company jets more appealing to environmentally mindful buyers - specifically corporations facing concerns over sustainability from shareholders or green campaign groups.

The schedule of less contaminating private jets might also spare the rich and famous the unfavorable promotion experienced by Britain's Prince Harry and his better half Meghan over a recent personal 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," said Bryan Sherbacow, chief industrial 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 eco-friendly fuel blends anticipated to be pumped at the program.

FLIGHT SHAMING

Private jets account for less than 0.1% of total annual carbon emissions globally, but can give off, usually, up to 20 times more carbon emissions per traveler mile than jetliners, according to the London-based private charter company Victor.

Prince Harry has actually defended his periodic use of private jets to guarantee his household's security, and has stated that on the rare events he does not fly commercially he offsets his emissions.

But planemakers state incidents such as the furore over his schedule have included fresh difficulties for a market currently making every effort to justify its contribution to cutting corporate expenses.

"Incidents of flight shaming involving using personal jets are unfortunate when you think about that our market has actually provided fuel efficiency improvements of 40% over the previous 40 years," said Bombardier Aviation President David Coleal.

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

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

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

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

Demand from service jet operators for renewable fuels now far exceeds 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 likewise seeing more interest from clients who desire 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 role in a business jet usage study his company recently finished for a Fortune 500 business.

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