By Allison Lampert

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

Fuel producers and are eager to showcase novel kinds of air travel fuel deemed less hazardous to the climate, from used cooking oil to the definitely less glamorous meat waste.

Business jet operators, like airlines, have acquiesced environmental pressure on aviation and dedicated to cutting in half carbon emissions by 2050 compared to 2005.

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

The availability of less contaminating personal jets could also spare the rich and famous the unfavorable publicity experienced by Britain's Prince Harry and his partner Meghan over a current private jet trip to southern France.

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

The latest waste-based fuels include "fats, grease and oils that are by-products of the food market," said Bryan Sherbacow, chief business officer of Boston-based biofuel producer World Energy, which produces fuel from meat waste utilized by Gulfstream.

"All of our product is inedible."

A few of the other 79 aircraft on screen 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 annual carbon emissions worldwide, but can discharge, on average, up to 20 times more carbon emissions per traveler mile than jetliners, according to the London-based private charter company Victor.

Prince Harry has actually defended his periodic use of private jets to ensure his family's security, and has stated that on the rare occasions 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 difficulties for an industry already striving to justify its contribution to cutting business costs.

"Incidents of flight shaming involving using private jets are regrettable when you consider that our market has actually provided fuel effectiveness enhancements of 40% over the past 40 years," said Bombardier Aviation President David Coleal.

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

But even an image makeover - with jets sporting stickers like "this aircraft flies on eco-friendly fuels" and organisers including 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 analysts stay hesitant that biojetfuels, usually mixed 50-50 with kerosene, will make a considerable influence on public perceptions about luxury travel.

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

Demand from company jet operators for sustainable 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, might expand production as much as 150 million gallons by 2022.

Corporate charter business and experts are also seeing more interest from consumers who desire to buy 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 utilization research study his business recently completed for a Fortune 500 company.

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