By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's greatest market show in Las Vegas high-end jets are tempting buyers with their sleek shapes, luxurious cabins - and increasingly, their usage of alternative fuels.

Fuel manufacturers and jetmakers are keen to showcase novel forms of air travel fuel deemed less damaging to the climate, from utilized cooking oil to the clearly less glamorous meat waste.

Business jet operators, like airline companies, have acquiesced environmental pressure on aviation and devoted to halving carbon emissions by 2050 compared with 2005.

Their hope is that adopting sustainable fuel to curb emissions might make service jets more attractive to ecologically mindful buyers - especially corporations dealing with questions over sustainability from investors or green campaign groups.

The accessibility of less polluting personal jets might also spare the abundant and famous the unfavorable publicity experienced by Britain's Prince Harry and his better half Meghan over a recent private jet journey to southern France.

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

The latest waste-based fuels consist of "fats, grease and oils that are by-products of the food industry," stated Bryan Sherbacow, chief business officer of Boston-based biofuel manufacturer World Energy, which produces fuel from meat waste used by Gulfstream.

"All of our product is inedible."

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

FLIGHT SHAMING

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

Prince Harry has actually defended his periodic use of private jets to guarantee his family's safety, and has said that on the unusual celebrations he does not fly commercially he offsets his emissions.

But planemakers say incidents such as the furore over his itinerary have actually added fresh obstacles for a market already making every effort to justify its contribution to cutting corporate expenses.

"Incidents of flight shaming involving the usage of private jets are unfortunate when you think about that our market has actually delivered fuel effectiveness improvements of 40% over the past 40 years," stated Bombardier Aviation President David Coleal.

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

But even an image transformation - with jets sporting sticker labels like "this airplane flies on sustainable fuels" and organisers including alternative fuel pumps for going to aircrafts - is unlikely to satisfy all critics at the Oct 22-24 high-end jet event.

Environmentalists and some analysts stay doubtful that biojetfuels, normally mixed 50-50 with kerosene, will make a significant influence on public understandings about high-end travel.

"No quantity of Jatropha or Brazil-nut fuel can make business jets look eco-friendly," said expert Richard Aboulafia.

Demand from organization jet operators for renewable fuels now far surpasses supply and their interest might drive future production, Sherbacow said.

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

Corporate charter companies and specialists are likewise seeing more interest from consumers 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 utilization research study his company recently completed for a Fortune 500 company.

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