By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's most significant market show in Las Vegas luxury jets are enticing buyers with their smooth shapes, luxurious cabins - and increasingly, their usage of alternative fuels.

Fuel manufacturers and jetmakers are keen to display unique forms of aviation fuel deemed less harmful to the environment, from utilized cooking oil to the distinctly less attractive meat waste.

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

Their hope is that embracing renewable fuel to curb emissions could make organization jets more attractive to ecologically conscious buyers - particularly corporations dealing with concerns over sustainability from shareholders or green campaign groups.

The accessibility of less polluting private jets might also spare the rich and popular the negative publicity experienced by Britain's Prince Harry and his other half Meghan over a current private jet journey to southern France.

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

The most recent waste-based fuels include "fats, grease and oils that are byproducts of the food market," stated Bryan Sherbacow, chief commercial 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 program.

FLIGHT SHAMING

Private jets represent less than 0.1% of overall annual carbon emissions globally, however can give off, on average, up to 20 times more carbon emissions per passenger mile than jetliners, according to the London-based personal charter firm Victor.

Prince Harry has actually defended his periodic use of private jets to guarantee his family's security, 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 difficulties for an industry currently making every effort to validate its contribution to cutting corporate expenses.

"Incidents of flight shaming including making use of personal jets are regrettable when you consider that our market has actually delivered fuel effectiveness improvements of 40% over the past 40 years," said Bombardier Aviation President David Coleal.

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

But even an image transformation - with jets sporting stickers like "this aircraft flies on renewable fuels" and organisers including alternative fuel pumps for checking out aircrafts - is not likely to please all critics at the Oct 22-24 luxury jet event.

Environmentalists and some analysts stay skeptical that biojetfuels, usually combined 50-50 with kerosene, will make a significant effect on public understandings about high-end travel.

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

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

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

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

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

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