By Allison Lampert

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

Fuel manufacturers and jetmakers are eager to showcase unique types of air travel 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 bowed to ecological pressure on aviation and dedicated to halving carbon emissions by 2050 compared with 2005.

Their hope is that embracing sustainable fuel to curb emissions could make service jets more appealing to ecologically conscious purchasers - specifically corporations dealing with questions over sustainability from shareholders or green project groups.

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

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

The most recent waste-based fuels consist of "fats, grease and oils that are byproducts of the food market," said Bryan Sherbacow, chief commercial officer of Boston-based biofuel producer World Energy, which produces fuel from meat waste utilized by Gulfstream.

"All of our product is inedible."

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

FLIGHT SHAMING

Private jets account for less than 0.1% of total yearly carbon emissions worldwide, but can discharge, typically, as much as 20 times more carbon emissions per guest mile than jetliners, according to the London-based personal charter company Victor.

Prince Harry has protected his periodic use of to ensure his household's safety, and has actually said that on the rare celebrations he does not fly commercially he offsets his emissions.

But planemakers state events such as the furore over his schedule have actually included fresh obstacles for a market already aiming to validate its contribution to cutting business expenses.

"Incidents of flight shaming involving using private jets are unfortunate when you consider that our market has provided fuel efficiency enhancements of 40% over the previous 40 years," stated Bombardier Aviation President David Coleal.

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

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

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

"No quantity of Jatropha or Brazil-nut fuel can make company jets look eco-friendly," stated air travel expert Richard Aboulafia.

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

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

Corporate charter companies and consultants are likewise seeing more interest from consumers who want to buy carbon credits to balance out emissions from their flights.

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

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