By Allison Lampert

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

Fuel producers and jetmakers are eager to showcase unique forms of aviation fuel considered less hazardous to the climate, from utilized cooking oil to the clearly less glamorous meat waste.

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

Their hope is that embracing sustainable fuel to curb emissions might make company jets more appealing to ecologically conscious buyers - particularly corporations dealing with concerns over sustainability from investors or green project groups.

The schedule of less contaminating private jets might likewise spare the abundant and popular the unfavorable promotion experienced by Britain's Prince Harry and his better half Meghan over a recent private jet trip to southern France.

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

The newest waste-based fuels include "fats, grease and oils that are by-products of the food market," 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."

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

FLIGHT SHAMING

Private jets account for less than 0.1% of total annual carbon emissions internationally, but can produce, usually, up to 20 times more carbon emissions per guest mile than jetliners, according to the London-based personal charter firm Victor.

Prince Harry has actually safeguarded his occasional use of private jets to ensure his family's safety, and has stated that on the unusual occasions he does not fly commercially he offsets his emissions.

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

"Incidents of flight shaming including the usage of private jets are unfortunate when you think about that our industry has provided fuel effectiveness enhancements of 40% over the past 40 years," stated Bombardier Aviation President David Coleal.

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

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

Environmentalists and some analysts remain hesitant that biojetfuels, generally mixed 50-50 with kerosene, will make a considerable effect on public understandings about luxury travel.

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

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

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

Corporate charter companies and specialists are also seeing more interest from clients who want to purchase carbon credits to offset emissions from their flights.

Brian Proctor, CEO of Mente Group, a U.S. consultancy, said emissions played a role in a corporate jet utilization study his business recently completed for a Fortune 500 business.

"At the end of the day, I believe that cost, expense per hour, variety, speed and performance, that's still the (sales) chauffeur. But I think individuals are becoming more familiar with the sustainability of operations and how it impacts the planet." (Reporting By Allison Lampert, by Tim Hepher and Alexandra Hudson)