By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's most significant industry show in Las Vegas luxury jets are drawing purchasers with their smooth silhouettes, luxurious cabins - and significantly, their use of alternative fuels.

Fuel producers and jetmakers are eager to novel forms of air travel fuel deemed less hazardous to the environment, from used cooking oil to the noticeably less attractive meat waste.

Business jet operators, like airlines, 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 renewable fuel to curb emissions might make company jets more attractive to environmentally conscious buyers - particularly corporations dealing with concerns over sustainability from shareholders or green campaign groups.

The schedule of less polluting personal jets might also spare the abundant and popular the unfavorable promotion experienced by Britain's Prince Harry and his better half Meghan over a recent personal jet journey to southern France.

Five Gulfstream jets on screen 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," said Bryan Sherbacow, primary business officer of Boston-based biofuel producer 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 are anticipated to be powered by 150,000 gallons of other renewable fuel mixes expected to be pumped at the show.

FLIGHT SHAMING

Private jets account for less than 0.1% of total annual carbon emissions internationally, however can produce, typically, up to 20 times more carbon emissions per traveler mile than jetliners, according to the London-based private charter firm Victor.

Prince Harry has protected his periodic usage of private jets to guarantee his household's safety, and has actually stated that on the unusual events he does not fly commercially he offsets his emissions.

But planemakers state occurrences such as the furore over his travel plan have included fresh obstacles 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 efficiency improvements of 40% over the past 40 years," said Bombardier Aviation President David Coleal.

Bombardier believes increased sustainable fuel usage will help the industry make inroads with corporations and wealthy purchasers. According to industry data, billionaires only have a 19% business jet ownership rate.

But even an image transformation - with jets sporting sticker labels like "this airplane 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 experts remain hesitant that biojetfuels, generally mixed 50-50 with kerosene, will make a substantial effect on public perceptions about high-end travel.

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

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

Corporate charter companies and specialists are also seeing more interest from clients who want to buy carbon credits to offset emissions from their flights.

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

"At the end of the day, I think that rate, expense per hour, range, speed and efficiency, that's still the (sales) chauffeur. But I think individuals 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)