By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's most significant market program in Las Vegas luxury jets are luring purchasers with their smooth shapes, plush cabins - and progressively, their usage of alternative fuels.

Fuel manufacturers and jetmakers are eager to showcase unique types of air travel fuel deemed less hazardous to the environment, from utilized cooking oil to the distinctly less glamorous meat waste.

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

Their hope is that embracing sustainable fuel to curb emissions might make business jets more appealing to environmentally conscious purchasers - specifically corporations dealing with questions over sustainability from shareholders or green campaign groups.

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

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

The current waste-based fuels consist of "fats, grease and oils that are byproducts of the food industry," said Bryan Sherbacow, primary commercial officer of Boston-based biofuel manufacturer World Energy, which produces fuel from meat waste used by Gulfstream.

"All of our item is inedible."

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

FLIGHT SHAMING

Private jets represent less than 0.1% of overall yearly carbon emissions globally, but can produce, typically, as much as 20 times more carbon emissions per guest mile than jetliners, according to the London-based private charter firm Victor.

Prince Harry has safeguarded his periodic usage of private jets to guarantee his household's safety, and has said that on the uncommon occasions he does not fly commercially he offsets his emissions.

But planemakers say occurrences such as the furore over his travel plan have actually added fresh difficulties for a market currently striving to validate its contribution to cutting corporate expenses.

"Incidents of flight shaming involving making use of private jets are unfortunate when you think about that our industry has actually provided fuel efficiency enhancements of 40% over the past 40 years," stated 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 information, billionaires only have a 19% service jet ownership rate.

But even an image makeover - with jets sporting sticker labels like "this aircraft flies on sustainable fuels" and organisers including alternative fuel pumps for going to planes - is not likely to satisfy all critics at the Oct 22-24 high-end jet occasion.

Environmentalists and some experts stay hesitant that biojetfuels, typically combined 50-50 with kerosene, will make a significant influence on public perceptions about luxury travel.

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

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

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

Corporate charter companies and consultants are also seeing more interest from customers who desire to purchase carbon credits to offset emissions from their flights.

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

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