By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's greatest market program in Las Vegas luxury jets are tempting buyers with their streamlined silhouettes, plush cabins - and progressively, their usage of alternative fuels.

Fuel producers and jetmakers are eager to display novel types of air travel fuel considered less damaging to the climate, from utilized cooking oil to the definitely less glamorous meat waste.

Business jet operators, like airlines, have bowed to environmental pressure on air travel and devoted to halving carbon emissions by 2050 compared with 2005.

Their hope is that adopting eco-friendly fuel to suppress emissions might make business jets more attractive to environmentally mindful buyers - specifically corporations dealing with questions over sustainability from investors or green campaign groups.

The schedule of less polluting private jets could likewise spare the abundant and famous the negative publicity experienced by Britain's Prince Harry and his other half Meghan over a current personal jet trip to southern France.

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

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

"All of our item is inedible."

Some of the other 79 aircraft on display screen are expected to be powered by 150,000 gallons of other renewable fuel blends expected to be pumped at the program.

FLIGHT SHAMING

Private jets represent less than 0.1% of total annual carbon emissions globally, however can give off, usually, as much as 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 personal jets to ensure his household's security, and has actually stated that on the rare occasions he does not fly commercially he offsets his emissions.

But planemakers say occurrences such as the furore over his have actually included fresh challenges for an industry already making every effort to validate its contribution to cutting business expenses.

"Incidents of flight shaming involving making use of personal jets are regrettable when you consider that our industry has delivered fuel performance enhancements of 40% over the past 40 years," said Bombardier Aviation President David Coleal.

Bombardier thinks increased sustainable fuel use will assist the industry make inroads with corporations and wealthy purchasers. According to market data, billionaires just have a 19% company jet ownership rate.

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

Environmentalists and some analysts remain hesitant that biojetfuels, usually combined 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 service jets look eco-friendly," stated air travel analyst Richard Aboulafia.

Demand from business jet operators for sustainable fuels now far goes beyond 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 up to 150 million gallons by 2022.

Corporate charter companies 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, said emissions played a role in a business jet utilization research study his company recently finished for a Fortune 500 business.

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