By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's greatest market show in Las Vegas high-end jets are tempting purchasers with their sleek silhouettes, luxurious cabins - and significantly, their usage of alternative fuels.

Fuel producers and jetmakers are eager to showcase novel kinds of air travel fuel deemed less harmful to the environment, from used cooking oil to the definitely less attractive meat waste.

Business jet operators, like airlines, have actually acquiesced ecological pressure on air travel and dedicated to halving carbon emissions by 2050 compared with 2005.

Their hope is that embracing sustainable fuel to curb emissions might make service jets more attractive to environmentally conscious buyers - specifically corporations facing concerns over sustainability from shareholders or green project groups.

The schedule of less polluting private jets might also spare the abundant and well-known the negative publicity experienced by Britain's Prince Harry and his better half Meghan over a current personal jet journey to southern France.

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

The current waste-based fuels consist of "fats, grease and oils that are by-products of the food industry," said Bryan Sherbacow, primary commercial officer of Boston-based biofuel manufacturer World Energy, which produces fuel from meat waste utilized by Gulfstream.

"All of our item is inedible."

A few of the other 79 aircraft on 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 emissions globally, however can emit, typically, 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 periodic usage of private jets to ensure his family's security, and has said that on the rare celebrations he does not fly commercially he offsets his emissions.

But planemakers say occurrences such as the furore over his travel plan have included fresh challenges for an industry already making every effort to justify its contribution to cutting business costs.

"Incidents of flight shaming involving the use of personal jets are regrettable when you think about that our industry 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 assist the market make inroads with corporations and wealthy purchasers. According to market data, billionaires only have a 19% service jet ownership rate.

But even an image remodeling - with jets sporting stickers like "this aircraft flies on renewable fuels" and organisers adding alternative fuel pumps for visiting planes - is not likely to satisfy all critics at the Oct 22-24 high-end jet event.

Environmentalists and some analysts stay hesitant that biojetfuels, typically mixed 50-50 with kerosene, will make a substantial effect on public perceptions about luxury travel.

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

Demand from service jet operators for renewable fuels now far exceeds 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 approximately 150 million gallons by 2022.

Corporate charter business and consultants are likewise seeing more interest from clients who wish to buy carbon credits to offset emissions from their flights.

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

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