By Allison Lampert

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

Fuel manufacturers and jetmakers are eager to showcase novel kinds of air travel fuel considered less hazardous to the environment, from used cooking oil to the distinctly less attractive meat waste.

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

Their hope is that adopting eco-friendly fuel to curb emissions could make service jets more attractive to ecologically mindful purchasers - particularly corporations dealing with questions over sustainability from investors or green project groups.

The schedule of less polluting personal jets might likewise spare the abundant and popular the unfavorable promotion experienced by Britain's Prince Harry and his spouse Meghan over a current personal jet trip to southern France.

Five Gulfstream jets on display screen in Las Vegas are utilizing California-produced fuel from inedible beef tallow.

The most recent waste-based fuels include “fats, grease and oils that are byproducts of the food market,” stated Bryan Sherbacow, chief business officer of Boston-based biofuel producer World Energy, which produces fuel from meat waste utilized by Gulfstream.

"All of our item is inedible.“

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

FLIGHT SHAMING

Private jets account for less than 0.1% of total yearly carbon emissions worldwide, but can release, typically, as much as 20 times more carbon emissions per passenger mile than jetliners, according to the London-based personal charter company Victor.

Prince Harry has safeguarded his occasional usage of personal jets to guarantee his family's safety, and has said that on the unusual occasions he does not fly commercially he offsets his emissions.

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

"Incidents of flight shaming involving the use of personal jets are unfortunate when you consider that our market has delivered fuel effectiveness improvements of 40% over the past 40 years,” said Bombardier Aviation President David Coleal.

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

But even an image transformation - with jets sporting sticker labels like “this aircraft flies on sustainable fuels” and organisers adding alternative fuel pumps for checking out aircrafts - is unlikely to satisfy all critics at the Oct 22-24 luxury jet occasion.

Environmentalists and some experts remain doubtful that biojetfuels, normally mixed 50-50 with kerosene, will make a considerable effect on public perceptions about luxury 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 business jet operators for renewable fuels now far goes beyond supply and their interest could drive future production, Sherbacow said.

World Energy, which produces 40 million gallons of at its California plant, could 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, stated emissions played a role in a business jet utilization 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) driver. But I think individuals are ending up being more knowledgeable about the sustainability of operations and how it impacts the planet.” (Reporting By Allison Lampert, Editing by Tim Hepher and Alexandra Hudson)