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By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's biggest market program in Las Vegas luxury jets are enticing purchasers with their streamlined shapes, plush cabins - and progressively, their use of alternative fuels.

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

Business jet operators, like airline companies, have acquiesced ecological pressure on aviation and committed to halving carbon emissions by 2050 compared with 2005.

Their hope is that embracing eco-friendly fuel to curb emissions might make service jets more appealing to ecologically conscious purchasers - specifically corporations dealing with questions over sustainability from shareholders or green campaign groups.

The schedule of less contaminating personal jets could likewise spare the rich and popular the unfavorable promotion experienced by Harry and his other half 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 newest waste-based fuels consist of "fats, grease and oils that are byproducts of the food market," said Bryan Sherbacow, chief commercial officer of Boston-based biofuel manufacturer World Energy, which produces fuel from meat waste used by Gulfstream.

"All of our product is inedible."

Some of the other 79 aircraft on display are anticipated to be powered by 150,000 gallons of other eco-friendly fuel mixes anticipated to be pumped at the show.

FLIGHT SHAMING

Private jets account for less than 0.1% of overall yearly carbon emissions globally, but can produce, usually, approximately 20 times more carbon emissions per guest mile than jetliners, according to the London-based personal charter firm Victor.

Prince Harry has safeguarded his occasional use of personal jets to guarantee his family's safety, and has actually said that on the uncommon celebrations he does not fly commercially he offsets his emissions.

But planemakers say events such as the furore over his itinerary have added fresh obstacles for an industry currently making every effort to validate its contribution to cutting business expenses.

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

Bombardier believes increased sustainable fuel use will help the industry make inroads with corporations and rich buyers. According to market information, billionaires only have a 19% service jet ownership rate.

But even an image makeover - with jets sporting stickers like "this aircraft flies on sustainable fuels" and organisers adding alternative fuel pumps for going to airplanes - is unlikely to please all critics at the Oct 22-24 high-end jet event.

Environmentalists and some analysts stay doubtful that biojetfuels, generally blended 50-50 with kerosene, will make a considerable effect on public perceptions about high-end travel.

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

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

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

Corporate charter companies and experts are likewise seeing more interest from clients who desire to purchase carbon credits to offset emissions from their flights.

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

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