By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's greatest industry show in Las Vegas luxury jets are tempting buyers with their sleek silhouettes, luxurious cabins - and increasingly, their usage of alternative fuels.

Fuel manufacturers and jetmakers are eager to showcase novel kinds of air travel fuel deemed less hazardous to the climate, from utilized cooking oil to the clearly less attractive meat waste.

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

Their hope is that adopting eco-friendly fuel to curb emissions might make business jets more attractive to environmentally conscious purchasers - especially corporations facing questions over sustainability from shareholders or green campaign groups.

The accessibility of less contaminating personal jets might also spare the rich and popular the unfavorable promotion experienced by Britain's Prince Harry and his other half Meghan over a current personal jet trip 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," stated Bryan Sherbacow, primary industrial officer of Boston-based biofuel producer World Energy, which produces fuel from meat waste used by Gulfstream.

"All of our item is inedible."

A few of the other 79 aircraft on display are anticipated to be powered by 150,000 gallons of other renewable fuel mixes expected to be pumped at the show.

FLIGHT SHAMING

Private jets represent less than 0.1% of total yearly carbon emissions worldwide, but can give off, usually, approximately 20 times more carbon emissions per traveler mile than jetliners, according to the London-based private charter firm Victor.

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

But planemakers say incidents such as the furore over his travel plan have included fresh challenges for an industry already making every effort to validate its contribution to cutting corporate costs.

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

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

But even an image transformation - with jets sporting stickers like "this airplane flies on renewable fuels" and organisers including alternative fuel pumps for visiting aircrafts - is unlikely to satisfy all critics at the Oct 22-24 high-end jet event.

Environmentalists and some experts stay hesitant that biojetfuels, typically mixed 50-50 with kerosene, will make a considerable effect on public understandings about high-end travel.

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

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

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

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

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

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