By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's most significant market program in Las Vegas luxury jets are luring buyers with their sleek silhouettes, - and progressively, their use of alternative fuels.

Fuel manufacturers and jetmakers are keen to display novel forms of aviation fuel considered less hazardous to the climate, from used cooking oil to the clearly less glamorous meat waste.

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

Their hope is that embracing renewable fuel to curb emissions could make service jets more attractive to environmentally mindful purchasers - specifically corporations facing questions over sustainability from shareholders or green project groups.

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

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

The current waste-based fuels consist of "fats, grease and oils that are by-products of the food market," stated Bryan Sherbacow, chief commercial 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 aircraft on display 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 overall yearly carbon emissions worldwide, but can emit, usually, approximately 20 times more carbon emissions per traveler mile than jetliners, according to the London-based private charter firm Victor.

Prince Harry has safeguarded his occasional usage of private jets to guarantee his family's safety, and has actually said that on the unusual occasions he does not fly commercially he offsets his emissions.

But planemakers say occurrences such as the furore over his travel plan have added fresh obstacles for an industry currently making every effort to validate its contribution to cutting corporate expenses.

"Incidents of flight shaming involving using private jets are regrettable when you consider that our market has delivered fuel performance enhancements 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 market data, billionaires just have a 19% company jet ownership rate.

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

Environmentalists and some analysts remain hesitant that biojetfuels, normally mixed 50-50 with kerosene, will make a significant effect on public perceptions about high-end travel.

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

Demand from service jet operators for sustainable fuels now far exceeds supply and their interest could drive future production, Sherbacow stated.

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

Corporate charter business and specialists 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, stated emissions played a role in a business jet utilization research study his company just recently finished for a Fortune 500 business.

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