By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's most significant industry show in Las Vegas luxury jets are enticing purchasers with their smooth shapes, luxurious cabins - and significantly, their usage of alternative fuels.

Fuel manufacturers and jetmakers are eager to showcase unique kinds of aviation fuel considered less harmful to the environment, from utilized cooking oil to the clearly less attractive meat waste.

Business jet operators, like airline companies, have bowed to environmental pressure on air travel and dedicated to halving carbon emissions by 2050 compared to 2005.

Their hope is that adopting sustainable fuel to suppress emissions might make service jets more attractive to ecologically mindful purchasers - particularly corporations facing questions over sustainability from shareholders or green campaign groups.

The availability of less contaminating private jets might likewise spare the rich and famous the unfavorable 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 most recent waste-based fuels include "fats, grease and oils that are by-products of the food industry," said Bryan Sherbacow, primary commercial officer of Boston-based biofuel manufacturer World Energy, which produces fuel from meat waste utilized by Gulfstream.

"All of our item is inedible."

Some of the other 79 airplane on display are expected to be powered by 150,000 gallons of other sustainable fuel blends anticipated to be pumped at the show.

FLIGHT SHAMING

Private jets account for less than 0.1% of total annual carbon emissions internationally, however can discharge, 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 actually defended his occasional usage of personal jets to ensure his family's safety, and has stated that on the uncommon events he does not fly commercially he offsets his emissions.

But planemakers state events such as the furore over his travel plan have actually included fresh difficulties for an industry currently aiming to validate its contribution to cutting business expenses.

"Incidents of flight shaming involving using private jets are regrettable when you think about that our market 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 help the market make inroads with corporations and rich purchasers. According to industry information, billionaires only have a 19% organization jet ownership rate.

But even an image remodeling - with jets sporting sticker labels like "this aircraft flies on eco-friendly fuels" and organisers adding alternative fuel pumps for going to planes - is not likely to satisfy all critics at the Oct 22-24 high-end jet occasion.

Environmentalists and some analysts stay doubtful that biojetfuels, generally combined 50-50 with kerosene, will make a substantial effect on public understandings about luxury travel.

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

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

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 companies and specialists are likewise seeing more interest from customers 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 business jet usage study his business just recently finished for a Fortune 500 company.

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