By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's biggest industry show in Las Vegas high-end jets are drawing purchasers with their smooth shapes, plush cabins - and increasingly, their use of alternative fuels.

Fuel producers and jetmakers are eager to showcase unique types of aviation fuel deemed less damaging to the climate, from used cooking oil to the definitely less glamorous meat waste.

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

Their hope is that adopting sustainable fuel to curb emissions might make business jets more attractive to environmentally conscious buyers - particularly corporations facing questions over sustainability from investors or green project groups.

The availability of less contaminating personal jets might also spare the abundant and popular the negative publicity experienced by Britain's Prince Harry and his partner Meghan over a current personal jet trip to southern France.

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

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

"All of our item is inedible."

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

FLIGHT SHAMING

Private jets account for less than 0.1% of total 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 personal charter company Victor.

Prince Harry has actually defended his occasional use of private jets to ensure his family's security, and has actually said that on the unusual occasions he does not fly commercially he offsets his emissions.

But planemakers state occurrences such as the furore over his travel plan have actually added fresh challenges for a market already striving to justify its contribution to expenses.

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

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

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

Environmentalists and some analysts stay hesitant that biojetfuels, generally blended 50-50 with kerosene, will make a substantial influence on public perceptions about luxury travel.

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

Demand from service jet operators for eco-friendly fuels now far exceeds supply and their interest could drive future production, Sherbacow stated.

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 also seeing more interest from customers who desire to purchase 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 company.

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