By Lampert

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

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

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

Their hope is that embracing sustainable fuel to curb emissions could make company jets more attractive to ecologically mindful buyers - specifically corporations facing concerns over sustainability from investors or green campaign groups.

The availability of less polluting personal jets could also spare the abundant and well-known the unfavorable promotion experienced by Britain's Prince Harry and his wife Meghan over a recent private jet journey to southern France.

Five Gulfstream jets on display in Las Vegas are utilizing 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 industrial 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 airplane on display are anticipated to be powered by 150,000 gallons of other eco-friendly fuel mixes anticipated to be pumped at the program.

FLIGHT SHAMING

Private jets account for less than 0.1% of total annual carbon emissions worldwide, however can emit, 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 safeguarded his periodic use of private jets to ensure his family's safety, and has actually stated that on the rare occasions he does not fly commercially he offsets his emissions.

But planemakers say incidents such as the furore over his travel plan have actually added fresh difficulties for an industry already striving to justify its contribution to cutting corporate costs.

"Incidents of flight shaming involving the use of private jets are unfortunate when you consider that our industry has actually delivered fuel effectiveness enhancements of 40% over the previous 40 years," stated Bombardier Aviation President David Coleal.

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

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

Environmentalists and some analysts stay skeptical that biojetfuels, typically combined 50-50 with kerosene, will make a substantial effect on public perceptions about high-end travel.

"No quantity of Jatropha or Brazil-nut fuel can make organization jets look eco-friendly," said air travel expert Richard Aboulafia.

Demand from business jet operators for eco-friendly fuels now far exceeds supply and their interest could drive future production, Sherbacow said.

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

Corporate charter business and specialists are also 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, stated emissions contributed in a business jet usage study his business recently finished for a Fortune 500 company.

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