By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's biggest market program in Las Vegas luxury jets are luring buyers with their sleek shapes, plush cabins - and increasingly, their usage of alternative fuels.

Fuel producers and jetmakers are keen to display novel types of aviation fuel considered less damaging to the environment, 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 cutting in half carbon emissions by 2050 compared with 2005.

Their hope is that adopting renewable fuel to curb emissions could make company jets more attractive to buyers - particularly corporations dealing with concerns over sustainability from shareholders or green campaign groups.

The accessibility of less contaminating personal jets could likewise spare the abundant and famous the unfavorable publicity experienced by Britain's Prince Harry and his wife Meghan over a recent personal jet trip to southern France.

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

The current waste-based fuels include "fats, grease and oils that are by-products of the food market," stated Bryan Sherbacow, primary commercial officer of Boston-based biofuel producer World Energy, which produces fuel from meat waste used by Gulfstream.

"All of our item is inedible."

A few of the other 79 airplane on screen are expected 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 yearly carbon emissions globally, however can produce, on average, up to 20 times more carbon emissions per guest mile than jetliners, according to the London-based private charter company Victor.

Prince Harry has safeguarded his periodic use of personal jets to ensure his household's safety, and has stated that on the unusual celebrations he does not fly commercially he offsets his emissions.

But planemakers say events such as the furore over his schedule have actually added fresh challenges for an industry already striving to justify its contribution to cutting business expenses.

"Incidents of flight shaming including using personal jets are regrettable when you consider that our industry has delivered fuel performance enhancements of 40% over the previous 40 years," stated Bombardier Aviation President David Coleal.

Bombardier thinks increased sustainable fuel use will help the industry make inroads with corporations and rich buyers. According to industry data, billionaires just have a 19% business jet ownership rate.

But even an image makeover - with jets sporting sticker labels like "this aircraft flies on eco-friendly 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 occasion.

Environmentalists and some analysts stay skeptical that biojetfuels, usually mixed 50-50 with kerosene, will make a significant influence on public perceptions about high-end travel.

"No amount of Jatropha or Brazil-nut fuel can make business jets look eco-friendly," said aviation analyst Richard Aboulafia.

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

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

Corporate charter business and experts 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, said emissions contributed in a business jet usage study his company recently completed for a Fortune 500 company.

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