By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world’s greatest market program in Las Vegas luxury jets are tempting purchasers with their streamlined shapes, luxurious cabins - and increasingly, their use of alternative fuels.

Fuel producers and jetmakers are keen to display unique forms of air travel fuel considered less harmful to the environment, from used cooking oil to the clearly less glamorous meat waste.

Business jet operators, like airlines, have actually acquiesced ecological pressure on air travel and dedicated to halving carbon emissions by 2050 compared with 2005.

Their hope is that adopting renewable fuel to suppress emissions might make business jets more appealing to ecologically mindful buyers - particularly corporations facing questions over sustainability from investors or green campaign groups.

The accessibility of less contaminating personal jets could also spare the rich and well-known the unfavorable publicity experienced by Britain’s Prince Harry and his wife Meghan over a recent private jet trip to southern France.

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

The most recent waste-based fuels include “fats, grease and oils that are byproducts of the food industry,” said Bryan Sherbacow, chief industrial 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 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 account for less than 0.1% of total annual carbon emissions worldwide, but can give off, on average, approximately 20 times more carbon emissions per guest mile than jetliners, according to the London-based private charter firm Victor.

Prince Harry has defended his occasional usage of private jets to guarantee his family’s safety, and has actually stated that on the unusual celebrations he does not fly commercially he offsets his emissions.

But planemakers state events such as the furore over his itinerary have included fresh obstacles for a market already making every effort to justify its contribution to cutting corporate expenses.

“Incidents of flight shaming including the usage of private jets are regrettable when you consider that our industry has delivered fuel effectiveness enhancements of 40% over the past 40 years,” stated Bombardier Aviation President David Coleal.

Bombardier believes increased sustainable fuel usage will help the market make inroads with corporations and wealthy buyers. According to market information, just have a 19% business jet ownership rate.

But even an image remodeling - with jets sporting stickers like “this aircraft flies on renewable fuels” and organisers including alternative fuel pumps for checking out planes - is not likely to please all critics at the Oct 22-24 high-end jet occasion.

Environmentalists and some experts stay hesitant that biojetfuels, normally mixed 50-50 with kerosene, will make a considerable impact on public understandings about luxury travel.

“No quantity of jatropha curcas or Brazil-nut fuel can make service jets look eco-friendly,” said air travel analyst Richard Aboulafia.

Demand from business jet operators for renewable fuels now far goes beyond supply and their interest might drive future production, Sherbacow stated.

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

Corporate charter companies and consultants 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 study his business recently completed for a Fortune 500 company.

“At the end of the day, I think that rate, expense per hour, variety, speed and performance, that’s still the (sales) chauffeur. But I think people are ending up being more familiar with the sustainability of operations and how it impacts the world.” (Reporting By Allison Lampert, Editing by Tim Hepher and Alexandra Hudson)