By Allison Lampert

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

Fuel producers and jetmakers are eager to display novel types of aviation fuel considered less hazardous to the climate, from utilized cooking oil to the distinctly less attractive meat waste.

Business jet operators, like airlines, have actually bowed to environmental pressure on and dedicated to halving carbon emissions by 2050 compared to 2005.

Their hope is that adopting sustainable fuel to curb emissions might make organization jets more attractive to environmentally 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 popular the negative promotion experienced by Britain's Prince Harry and his better half Meghan over a current personal jet trip to southern France.

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

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

"All of our product is inedible."

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

FLIGHT SHAMING

Private jets account for less than 0.1% of overall annual carbon emissions internationally, but can release, on average, approximately 20 times more carbon emissions per passenger mile than jetliners, according to the London-based personal charter company Victor.

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

But planemakers say events such as the furore over his travel plan have actually added fresh challenges for a market currently making every effort to justify its contribution to cutting business expenses.

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

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

But even an image remodeling - with jets sporting sticker labels like "this aircraft flies on renewable fuels" and organisers including alternative fuel pumps for visiting airplanes - is not likely to please all critics at the Oct 22-24 luxury jet occasion.

Environmentalists and some analysts stay skeptical that biojetfuels, generally mixed 50-50 with kerosene, will make a substantial influence on public understandings about luxury travel.

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

Demand from company jet operators for renewable 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, might broaden production up to 150 million gallons by 2022.

Corporate charter companies and consultants are also seeing more interest from customers who wish to buy carbon credits to offset emissions from their flights.

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

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