By Allison Lampert

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

Fuel producers and jetmakers are keen to showcase unique types of aviation fuel deemed less hazardous to the environment, from utilized cooking oil to the noticeably less attractive meat waste.

Business jet operators, like airlines, have acquiesced ecological pressure on aviation and dedicated to halving carbon emissions by 2050 compared with 2005.

Their hope is that embracing sustainable fuel to curb emissions might make service jets more attractive to ecologically conscious buyers - especially corporations facing concerns over sustainability from shareholders or green project groups.

The schedule of less polluting personal jets could also spare the abundant and well-known 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 display in Las Vegas are utilizing California-produced fuel from inedible beef tallow.

The newest waste-based fuels include "fats, grease and oils that are byproducts of the food market," stated Bryan Sherbacow, chief industrial officer of Boston-based biofuel producer World Energy, which produces fuel from meat waste utilized 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 renewable fuel mixes expected to be pumped at the program.

FLIGHT SHAMING

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

Prince Harry has protected his occasional usage of private jets to ensure his family's safety, and has actually said that on the rare occasions he does not fly commercially he offsets his emissions.

But planemakers say events such as the furore over his travel plan have added fresh challenges for a market already making every effort to justify its contribution to cutting business costs.

"Incidents of flight shaming involving making use of personal jets are unfortunate when you think about that our market has actually provided fuel effectiveness improvements 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 wealthy buyers. According to market data, billionaires just have a 19% business jet ownership rate.

But even an image transformation - with jets sporting sticker labels like "this airplane flies on sustainable fuels" and organisers fuel pumps for checking out aircrafts - is unlikely to please all critics at the Oct 22-24 high-end jet occasion.

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

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

Demand from organization jet operators for sustainable fuels now far exceeds supply and their interest might drive future production, Sherbacow stated.

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

Corporate charter companies and specialists are likewise seeing more interest from consumers who want to purchase carbon credits to offset emissions from their flights.

Brian Proctor, CEO of Mente Group, a U.S. consultancy, stated emissions contributed in a business jet utilization research study his company recently completed for a Fortune 500 business.

"At the end of the day, I believe that cost, expense per hour, range, speed and efficiency, that's still the (sales) motorist. But I believe people are becoming more mindful of the sustainability of operations and how it affects the world." (Reporting By Allison Lampert, Editing by Tim Hepher and Alexandra Hudson)