By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's biggest market program in Las Vegas high-end jets are enticing purchasers with their smooth shapes, luxurious cabins - and increasingly, their usage of alternative fuels.

Fuel producers and jetmakers are keen to display novel types of aviation fuel considered less hazardous to the climate, from utilized cooking oil to the noticeably less glamorous meat waste.

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

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

The accessibility of less contaminating private jets might likewise spare the rich and well-known the negative publicity experienced by Harry and his better half Meghan over a recent private jet journey to southern France.

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

The newest waste-based fuels consist of "fats, grease and oils that are by-products of the food market," stated 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 expected to be powered by 150,000 gallons of other sustainable fuel mixes anticipated to be pumped at the program.

FLIGHT SHAMING

Private jets account for less than 0.1% of overall yearly carbon emissions globally, but can emit, typically, approximately 20 times more carbon emissions per guest mile than jetliners, according to the London-based personal charter firm Victor.

Prince Harry has defended his occasional use of personal jets to ensure his household's security, and has stated that on the uncommon events he does not fly commercially he offsets his emissions.

But planemakers state incidents such as the furore over his schedule have actually added fresh difficulties for a market already striving to validate its contribution to cutting corporate expenses.

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

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

But even an image makeover - with jets sporting stickers like "this airplane flies on eco-friendly fuels" and organisers adding alternative fuel pumps for going to aircrafts - is not likely to please all critics at the Oct 22-24 luxury jet occasion.

Environmentalists and some analysts remain skeptical that biojetfuels, typically combined 50-50 with kerosene, will make a substantial impact 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 expert Richard Aboulafia.

Demand from business jet operators for renewable fuels now far exceeds supply and their interest could drive future production, Sherbacow said.

World Energy, which produces 40 million gallons of biofuel at its California plant, might broaden production as much as 150 million gallons by 2022.

Corporate charter companies and experts are also seeing more interest from clients who want to buy carbon credits to balance out emissions from their flights.

Brian Proctor, CEO of Mente Group, a U.S. consultancy, stated emissions played a function in a corporate jet usage study his company recently completed for a Fortune 500 business.

"At the end of the day, I think that cost, expense per hour, range, speed and efficiency, that's still the (sales) motorist. But I believe 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)