By Allison Lampert

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

Fuel manufacturers and jetmakers are keen to display novel types of air travel fuel deemed less harmful to the environment, from utilized cooking oil to the distinctly less attractive meat waste.

Business jet operators, like airline companies, have actually bowed to environmental pressure on air travel and devoted to cutting in half carbon emissions by 2050 compared with 2005.

Their hope is that embracing sustainable fuel to suppress emissions could make business jets more appealing to environmentally mindful buyers - specifically corporations dealing with questions over sustainability from shareholders or green campaign groups.

The availability of less contaminating personal jets might likewise spare the abundant and famous the negative publicity experienced by Britain's Prince Harry and his partner Meghan over a current personal jet journey to southern France.

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

The most current waste-based fuels include "fats, grease and oils that are by-products of the food market," said Bryan Sherbacow, primary industrial 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 airplane on screen are expected to be powered by 150,000 gallons of other sustainable fuel mixes to be pumped at the show.

FLIGHT SHAMING

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

Prince Harry has protected his occasional use of private jets to guarantee his family's security, and has stated that on the unusual occasions he does not fly commercially he offsets his emissions.

But planemakers state occurrences such as the furore over his schedule have actually included fresh challenges for an industry currently striving to justify its contribution to cutting corporate costs.

"Incidents of flight shaming including using private jets are regrettable when you think about that our market has delivered fuel effectiveness improvements of 40% over the past 40 years," said Bombardier Aviation President David Coleal.

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

But even an image transformation - with jets sporting stickers like "this aircraft flies on eco-friendly fuels" and organisers adding alternative fuel pumps for going to aircrafts - is unlikely to satisfy all critics at the Oct 22-24 luxury jet event.

Environmentalists and some analysts remain skeptical that biojetfuels, usually mixed 50-50 with kerosene, will make a considerable effect on public perceptions about high-end travel.

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

Demand from company jet operators for sustainable 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 broaden production as much as 150 million gallons by 2022.

Corporate charter companies and experts are likewise seeing more interest from customers who want to purchase carbon credits to balance out emissions from their flights.

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

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