By Allison Lampert

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

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

Business jet operators, like airline companies, have bowed to ecological pressure on air travel and devoted to halving carbon emissions by 2050 compared to 2005.

Their hope is that adopting renewable fuel to suppress emissions might make company jets more appealing to environmentally conscious purchasers - specifically corporations facing questions over sustainability from investors or green project groups.

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

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

The most recent waste-based fuels include "fats, grease and oils that are byproducts 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 display are expected to be powered by 150,000 gallons of other eco-friendly fuel mixes anticipated to be pumped at the program.

FLIGHT SHAMING

Private jets represent less than 0.1% of total annual carbon emissions internationally, however can release, typically, as much as 20 times more carbon emissions per guest mile than jetliners, according to the London-based personal charter firm Victor.

Prince Harry has actually defended his occasional usage of personal jets to guarantee his household's security, and has said that on the unusual celebrations he does not fly commercially he offsets his emissions.

But planemakers say events such as the furore over his itinerary have added fresh obstacles for an industry currently aiming to justify its contribution to expenses.

"Incidents of flight shaming including the usage of private jets are regrettable when you think about that our industry has actually delivered fuel performance enhancements of 40% over the past 40 years," stated Bombardier Aviation President David Coleal.

Bombardier thinks increased sustainable fuel use will assist the industry make inroads with corporations and wealthy buyers. According to market data, billionaires only have a 19% organization jet ownership rate.

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

Environmentalists and some experts remain skeptical that biojetfuels, generally mixed 50-50 with kerosene, will make a substantial influence on public understandings about high-end travel.

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

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

Corporate charter business and experts are also seeing more interest from customers who wish 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 company recently finished for a Fortune 500 business.

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