By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's greatest industry program in Las Vegas high-end jets are enticing purchasers with their smooth silhouettes, luxurious cabins - and significantly, their use of alternative fuels.

Fuel manufacturers and jetmakers are eager to display novel forms of air travel fuel deemed less harmful to the climate, from used cooking oil to the noticeably less glamorous meat waste.

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

Their hope is that embracing renewable fuel to suppress emissions might make service jets more attractive to environmentally mindful buyers - especially corporations dealing with questions over sustainability from shareholders or green project groups.

The schedule of less contaminating private jets could also spare the rich and well-known the unfavorable publicity experienced by Britain's Prince Harry and his spouse 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 recent waste-based fuels include "fats, grease and oils that are byproducts of the food market," stated Bryan Sherbacow, primary business 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 aircraft on screen are expected to be powered by 150,000 gallons of other eco-friendly fuel blends expected to be pumped at the program.

FLIGHT SHAMING

Private jets account for less than 0.1% of total yearly carbon emissions worldwide, however can release, usually, up to 20 times more carbon emissions per traveler mile than jetliners, according to the London-based personal charter company Victor.

Prince Harry has protected his occasional use of private jets to ensure his family's safety, and has said that on the rare events he does not fly commercially he offsets his emissions.

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

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

Bombardier thinks increased sustainable fuel usage will assist the industry make inroads with corporations and wealthy purchasers. 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 renewable fuels" and organisers including alternative fuel pumps for checking out aircrafts - is not likely to satisfy all critics at the Oct 22-24 luxury jet event.

Environmentalists and some remain doubtful that biojetfuels, typically blended 50-50 with kerosene, will make a substantial impact on public perceptions about high-end travel.

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

Demand from service jet operators for sustainable fuels now far surpasses supply and their interest might drive future production, Sherbacow stated.

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

Corporate charter business and specialists are likewise seeing more interest from consumers who desire to purchase carbon credits to offset emissions from their flights.

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

"At the end of the day, I believe that rate, expense per hour, range, speed and performance, that's still the (sales) chauffeur. But I believe people are ending up being more knowledgeable about the sustainability of operations and how it impacts the planet." (Reporting By Allison Lampert, Editing by Tim Hepher and Alexandra Hudson)