By Allison Lampert

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

Fuel producers and jetmakers are keen to display novel forms of aviation fuel deemed less harmful to the climate, from utilized cooking oil to the clearly less attractive meat waste.

Business jet operators, like airlines, have acquiesced environmental pressure on air travel and devoted to halving carbon emissions by 2050 compared to 2005.

Their hope is that adopting eco-friendly fuel to curb emissions might make company jets more appealing to environmentally mindful purchasers - especially corporations dealing with questions over sustainability from investors or green campaign groups.

The accessibility of less contaminating private jets could likewise spare the rich and famous the negative publicity experienced by Britain's Prince Harry and his partner Meghan over a recent private jet trip to southern France.

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

The most current waste-based fuels consist of "fats, grease and oils that are by-products of the food market," stated Bryan Sherbacow, primary industrial officer of Boston-based biofuel manufacturer World Energy, which produces fuel from meat waste utilized by Gulfstream.

"All of our item is inedible."

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

FLIGHT SHAMING

Private jets account for less than 0.1% of overall yearly carbon emissions worldwide, however can produce, on average, approximately 20 times more carbon emissions per traveler mile than jetliners, according to the London-based private charter firm Victor.

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

But planemakers say occurrences such as the furore over his itinerary have actually included fresh challenges for a market currently making every effort to justify its contribution to cutting corporate costs.

"Incidents of flight shaming including using personal jets are regrettable when you think about that our market has actually delivered fuel performance improvements of 40% over the past 40 years," said Bombardier Aviation President David Coleal.

Bombardier thinks increased sustainable fuel use will assist the industry make inroads with corporations and rich buyers. According to industry data, billionaires just have a 19% company jet ownership rate.

But even an image makeover - with jets sporting sticker labels like "this aircraft flies on renewable fuels" and organisers including alternative fuel pumps for going to airplanes - is unlikely to satisfy all critics at the Oct 22-24 luxury jet event.

Environmentalists and some analysts remain hesitant that biojetfuels, typically blended 50-50 with kerosene, will make a substantial effect on public perceptions about luxury travel.

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

Demand from service jet operators for sustainable fuels now far goes beyond supply and their interest might drive future production, Sherbacow said.

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

Corporate charter business and experts are also seeing more interest from consumers who desire to purchase carbon credits to offset emissions from their .

Brian Proctor, CEO of Mente Group, a U.S. consultancy, said emissions played a function in a business jet usage study his company just recently completed for a Fortune 500 company.

"At the end of the day, I think that rate, cost per hour, variety, speed and performance, that's still the (sales) motorist. But I believe individuals 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)