By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's most significant market show in Las Vegas luxury jets are luring buyers with their sleek shapes, - and significantly, their use of alternative fuels.

Fuel producers and jetmakers are keen to display novel types of aviation fuel considered less harmful to the climate, from utilized cooking oil to the noticeably less glamorous meat waste.

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

Their hope is that embracing sustainable fuel to curb emissions could make business jets more appealing to environmentally conscious purchasers - specifically corporations facing questions over sustainability from shareholders or green campaign groups.

The accessibility of less polluting private jets might likewise spare the rich and popular the negative publicity experienced by Britain's Prince Harry and his other 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," stated Bryan Sherbacow, primary commercial officer of Boston-based biofuel manufacturer 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 screen are anticipated to be powered by 150,000 gallons of other renewable fuel blends anticipated to be pumped at the show.

FLIGHT SHAMING

Private jets represent less than 0.1% of total annual carbon emissions internationally, but can give off, usually, approximately 20 times more carbon emissions per guest mile than jetliners, according to the London-based private charter company Victor.

Prince Harry has actually protected his periodic use of personal jets to guarantee his household's safety, and has actually said that on the rare celebrations he does not fly commercially he offsets his emissions.

But planemakers state incidents such as the furore over his travel plan have actually included fresh difficulties for an industry already making every effort to validate its contribution to cutting corporate expenses.

"Incidents of flight shaming including making use of private jets are unfortunate when you consider that our industry has actually delivered fuel performance enhancements of 40% over the past 40 years," said Bombardier Aviation President David Coleal.

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

But even an image makeover - with jets sporting stickers like "this airplane flies on eco-friendly fuels" and organisers adding alternative fuel pumps for checking out airplanes - is not likely to satisfy all critics at the Oct 22-24 luxury jet event.

Environmentalists and some analysts stay hesitant that biojetfuels, normally combined 50-50 with kerosene, will make a considerable effect on public understandings about high-end travel.

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

Demand from service jet operators for eco-friendly fuels now far surpasses supply and their interest could drive future production, Sherbacow said.

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

Corporate charter companies and consultants 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, said emissions contributed in a corporate jet usage research study his company recently completed for a Fortune 500 company.

"At the end of the day, I believe that price, cost per hour, range, speed and efficiency, that's still the (sales) motorist. But I believe people are ending up being more familiar with the sustainability of operations and how it affects the world." (Reporting By Allison Lampert, Editing by Tim Hepher and Alexandra Hudson)