By Allison Lampert

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

Fuel producers and jetmakers are keen to display unique types of air travel fuel deemed less harmful to the climate, from used cooking oil to the definitely less attractive meat waste.

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

Their hope is that adopting sustainable fuel to curb emissions might make service jets more appealing to environmentally mindful buyers - specifically corporations facing questions over sustainability from shareholders or green project groups.

The accessibility of less polluting personal jets might likewise spare the rich and famous the negative publicity experienced by Britain's Prince Harry and his other half Meghan over a current 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 include "fats, grease and oils that are byproducts of the food industry," stated Bryan Sherbacow, chief business officer of Boston-based biofuel manufacturer World Energy, which produces fuel from meat waste used by Gulfstream.

"All of our product is inedible."

Some of the other 79 aircraft on screen are anticipated to be powered by 150,000 gallons of other eco-friendly fuel blends anticipated to be pumped at the program.

FLIGHT SHAMING

Private jets account for less than 0.1% of overall annual carbon emissions globally, but can emit, on average, 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 protected his occasional usage of private jets to guarantee his household's safety, and has stated that on the uncommon events he does not fly commercially he offsets his emissions.

But planemakers say incidents such as the furore over his itinerary have actually included fresh obstacles for a market currently aiming to validate its contribution to cutting corporate expenses.

"Incidents of flight shaming involving using private jets are regrettable when you think about that our industry has delivered fuel performance improvements of 40% over the previous 40 years," stated Bombardier Aviation President David Coleal.

Bombardier thinks increased sustainable fuel use will help the market make inroads with corporations and rich purchasers. According to market information, billionaires only have a 19% company jet ownership rate.

But even an image - with jets sporting stickers like "this airplane flies on renewable fuels" and organisers adding alternative fuel pumps for going to planes - is unlikely to please all critics at the Oct 22-24 high-end jet event.

Environmentalists and some analysts stay skeptical that biojetfuels, normally blended 50-50 with kerosene, will make a considerable effect on public perceptions about luxury travel.

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

Demand from organization jet operators for renewable fuels now far goes beyond supply and their interest could drive future production, Sherbacow said.

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 consultants are also seeing more interest from clients who wish to purchase carbon credits to offset emissions from their flights.

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

"At the end of the day, I believe that cost, cost per hour, range, speed and efficiency, that's still the (sales) driver. But I believe people are becoming more familiar with the sustainability of operations and how it affects the planet." (Reporting By Allison Lampert, Editing by Tim Hepher and Alexandra Hudson)