By Allison Lampert

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

Fuel manufacturers and jetmakers are keen to display unique forms of aviation fuel deemed less harmful to the climate, from used cooking oil to the distinctly less glamorous meat waste.

Business jet operators, like airline companies, have acquiesced environmental pressure on air travel and committed to cutting in half carbon emissions by 2050 compared with 2005.

Their hope is that embracing sustainable fuel to curb emissions could make company jets more appealing to environmentally conscious purchasers - especially corporations facing concerns over sustainability from investors or green project groups.

The availability of less polluting personal jets could likewise spare the abundant and popular the negative promotion experienced by Britain's Prince Harry and his better half Meghan over a current private jet journey to southern France.

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

The most recent waste-based fuels include "fats, grease and oils that are by-products of the food industry," 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."

A few of the other 79 airplane on screen are anticipated 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 total annual carbon emissions worldwide, however can emit, typically, up to 20 times more carbon emissions per traveler mile than jetliners, according to the London-based personal charter company Victor.

Prince Harry has protected his periodic usage of personal jets to guarantee his household's safety, and has stated that on the uncommon celebrations he does not fly commercially he offsets his emissions.

But planemakers state incidents such as the furore over his travel plan have actually included fresh obstacles for a market currently making every effort to validate its contribution to cutting business costs.

"Incidents of flight shaming involving making use of private jets are regrettable when you think about that our market has delivered fuel efficiency improvements of 40% over the past 40 years," stated Bombardier Aviation President David Coleal.

Bombardier thinks increased sustainable fuel usage will assist the market make inroads with corporations and wealthy purchasers. 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 renewable fuels" and organisers including alternative fuel pumps for visiting airplanes - is unlikely to please all critics at the Oct 22-24 luxury jet occasion.

Environmentalists and some analysts stay hesitant that biojetfuels, normally blended 50-50 with kerosene, will make a significant influence on public understandings about high-end travel.

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

Demand from organization 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, might broaden production up to 150 million gallons by 2022.

Corporate charter business and consultants are also seeing more interest from consumers who want to purchase carbon credits to offset emissions from their flights.

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

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