By Allison Lampert

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

Fuel producers and jetmakers are keen to display novel types of air travel fuel deemed less damaging to the environment, from utilized cooking oil to the definitely less attractive meat waste.

Business jet operators, like airline companies, have acquiesced ecological 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 suppress emissions might make service jets more attractive to environmentally mindful buyers - particularly corporations dealing with concerns over sustainability from investors or green project groups.

The accessibility of less polluting personal jets might also spare the rich and popular the negative promotion experienced by Britain's Prince Harry and his other half Meghan over a recent private jet journey to southern France.

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

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

"All of our product is inedible."

A few 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 represent less than 0.1% of overall yearly carbon emissions internationally, but can discharge, on average, up to 20 times more carbon emissions per guest mile than jetliners, according to the London-based private charter company Victor.

Prince Harry has defended his occasional usage of personal jets to guarantee his household's safety, and has actually stated that on the rare occasions he does not fly commercially he offsets his emissions.

But planemakers state events such as the furore over his schedule have added fresh difficulties for an industry already striving to validate its contribution to cutting business costs.

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

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

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

Environmentalists and some experts remain hesitant that biojetfuels, typically combined 50-50 with kerosene, will make a substantial influence on public understandings about luxury travel.

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

Demand from business 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, could broaden production up to 150 million gallons by 2022.

Corporate charter business and consultants are also seeing more interest from customers who want to buy 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 completed for a Fortune 500 business.

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