By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's greatest industry show in Las Vegas luxury jets are luring buyers with their sleek silhouettes, plush cabins - and increasingly, their usage of alternative fuels.

Fuel producers and jetmakers are keen to display novel types of air travel fuel deemed less harmful to the environment, from used cooking oil to the distinctly less glamorous meat waste.

Business jet operators, like airline companies, have actually acquiesced environmental pressure on air travel and committed to halving carbon emissions by 2050 compared with 2005.

Their hope is that adopting eco-friendly fuel to suppress emissions could make service jets more appealing to ecologically conscious purchasers - specifically corporations facing questions over sustainability from investors or green project groups.

The schedule of less contaminating private jets might also spare the rich and well-known the unfavorable publicity experienced by Britain's Prince Harry and his spouse Meghan over a current private jet journey to southern France.

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

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

"All of our product is inedible."

A few of the other 79 aircraft on display screen 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 represent less than 0.1% of overall annual carbon emissions globally, but can discharge, on average, up to 20 times more carbon emissions per passenger mile than jetliners, according to the London-based private charter company Victor.

Prince Harry has safeguarded his periodic use of personal jets to guarantee his household's security, and has actually said that on the unusual occasions he does not fly commercially he offsets his emissions.

But planemakers say occurrences such as the furore over his itinerary have added fresh difficulties for a market already aiming to validate its contribution to cutting corporate expenses.

"Incidents of flight shaming involving making use of personal jets are unfortunate when you consider that our industry has actually provided fuel effectiveness enhancements of 40% over the past 40 years," said Bombardier Aviation President David Coleal.

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

But even an image remodeling - with jets sporting stickers like "this airplane flies on sustainable fuels" and organisers adding alternative fuel pumps for visiting airplanes - is not likely to please all critics at the Oct 22-24 luxury jet event.

Environmentalists and some analysts remain skeptical that biojetfuels, usually mixed 50-50 with kerosene, will make a significant impact on public perceptions about luxury travel.

"No quantity of jatropha curcas or Brazil-nut fuel can make business jets look eco-friendly," stated aviation analyst Richard Aboulafia.

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

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

Corporate charter business and experts are likewise seeing more interest from customers who desire to buy carbon credits to offset emissions from their flights.

Brian Proctor, CEO of Mente Group, a U.S. consultancy, stated emissions contributed in a business jet utilization research study his business just recently completed for a Fortune 500 company.

"At the end of the day, I think that price, cost per hour, range, speed and performance, that's still the (sales) chauffeur. But I believe people are ending up being more mindful of the sustainability of operations and how it impacts the world." (Reporting By Allison Lampert, Editing by Tim Hepher and Alexandra Hudson)