By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's most significant market program in Las Vegas luxury jets are luring purchasers with their smooth silhouettes, luxurious cabins - and increasingly, their usage of alternative fuels.

Fuel manufacturers and jetmakers are eager to display unique types of air travel fuel considered less hazardous to the climate, from utilized cooking oil to the definitely less attractive meat waste.

Business jet operators, like airlines, have actually acquiesced ecological on air travel and committed to cutting in half carbon emissions by 2050 compared to 2005.

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

The accessibility of less contaminating personal jets could likewise spare the abundant and popular the unfavorable promotion experienced by Britain's Prince Harry and his partner Meghan over a current personal jet journey to southern France.

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

The most recent waste-based fuels consist of "fats, grease and oils that are by-products of the food market," said Bryan Sherbacow, primary business officer of Boston-based biofuel manufacturer 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 renewable fuel blends anticipated to be pumped at the show.

FLIGHT SHAMING

Private jets account for less than 0.1% of overall yearly carbon emissions globally, however can give off, usually, up to 20 times more carbon emissions per traveler mile than jetliners, according to the London-based personal charter company Victor.

Prince Harry has actually defended his occasional use of private jets to ensure his family's security, and has stated that on the rare events he does not fly commercially he offsets his emissions.

But planemakers say incidents such as the furore over his itinerary have included fresh challenges for an industry currently striving to validate its contribution to cutting corporate costs.

"Incidents of flight shaming including making use of private jets are regrettable when you think about that our market has actually provided fuel effectiveness enhancements of 40% over the previous 40 years," said Bombardier Aviation President David Coleal.

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

But even an image transformation - with jets sporting sticker labels like "this airplane flies on sustainable fuels" and organisers adding alternative fuel pumps for going to planes - is not likely to please all critics at the Oct 22-24 high-end jet occasion.

Environmentalists and some experts remain doubtful that biojetfuels, usually mixed 50-50 with kerosene, will make a substantial influence on public perceptions about luxury travel.

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

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

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

Corporate charter companies and consultants are likewise seeing more interest from consumers who want to buy carbon credits to balance out emissions from their flights.

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

"At the end of the day, I think that rate, cost per hour, range, speed and performance, that's still the (sales) motorist. But I believe individuals are ending up being more familiar with the sustainability of operations and how it impacts the world." (Reporting By Allison Lampert, Editing by Tim Hepher and Alexandra Hudson)