By Allison Lampert

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

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

Business jet operators, like airlines, have bowed to environmental pressure on aviation and dedicated to halving 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 - specifically corporations dealing with questions over sustainability from investors or green campaign groups.

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

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

The most recent waste-based fuels consist of "fats, grease and oils that are byproducts of the food market," said Bryan Sherbacow, chief commercial officer of Boston-based biofuel manufacturer World Energy, which produces fuel from meat waste used by Gulfstream.

"All of our item is inedible."

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

FLIGHT SHAMING

Private jets account for less than 0.1% of overall yearly carbon emissions globally, however can release, typically, as much as 20 times more carbon emissions per guest mile than jetliners, according to the London-based private charter company Victor.

Prince Harry has safeguarded his periodic use of private jets to guarantee his family's security, and has actually stated that on the rare events he does not fly commercially he offsets his emissions.

But planemakers say events such as the furore over his travel plan have actually included fresh challenges for a market currently aiming to validate its contribution to cutting business expenses.

"Incidents of flight shaming including using private jets are regrettable when you think about that our market has provided fuel performance enhancements of 40% over the previous 40 years," stated Bombardier Aviation President David Coleal.

Bombardier believes increased sustainable fuel use will assist the market make inroads with corporations and rich 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 aircraft flies on renewable fuels" and organisers adding alternative fuel pumps for going to airplanes - is not likely to please all critics at the Oct 22-24 luxury jet event.

Environmentalists and some analysts stay doubtful that biojetfuels, generally combined 50-50 with kerosene, will make a significant effect on public perceptions about high-end travel.

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

Demand from business jet operators for sustainable 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 expand production approximately 150 million gallons by 2022.

Corporate charter companies and consultants are also seeing more interest from clients who want to purchase carbon credits to 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 think that rate, cost per hour, range, speed and performance, that's still the (sales) motorist. But I think individuals are becoming more familiar with the sustainability of operations and how it affects the planet." (Reporting By Allison Lampert, Editing by Tim Hepher and Alexandra Hudson)