By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's most significant industry show in Las Vegas luxury jets are tempting purchasers with their streamlined silhouettes, luxurious cabins - and increasingly, their usage of alternative fuels.

Fuel manufacturers and jetmakers are eager to showcase unique types of air travel fuel deemed less damaging to the environment, from used cooking oil to the noticeably less glamorous meat waste.

Business jet operators, like airlines, have actually acquiesced ecological pressure on aviation and devoted to cutting in half carbon emissions by 2050 compared with 2005.

Their hope is that adopting renewable fuel to suppress emissions could make company jets more appealing to environmentally mindful buyers - especially corporations dealing with questions over sustainability from investors or green project groups.

The accessibility of less polluting private jets could likewise spare the rich and well-known the unfavorable 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 by-products of the food industry," 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 product is inedible."

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

FLIGHT SHAMING

Private jets account for less than 0.1% of total yearly carbon emissions internationally, however can give off, typically, up to 20 times more carbon emissions per passenger mile than jetliners, according to the London-based private charter firm Victor.

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

But planemakers say occurrences such as the furore over his schedule have actually added fresh obstacles for a market currently aiming to justify its contribution to cutting business costs.

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

Bombardier thinks increased sustainable fuel use will help the market make inroads with corporations and wealthy purchasers. According to market data, billionaires just have a 19% business jet ownership rate.

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

Environmentalists and some experts remain hesitant that biojetfuels, typically combined 50-50 with kerosene, will make a considerable influence on public perceptions about luxury travel.

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

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

World Energy, which produces 40 million gallons of biofuel at its California plant, could expand production up to 150 million gallons by 2022.

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

Brian Proctor, CEO of Mente Group, a U.S. consultancy, said emissions played a role in a business jet utilization research study his company recently finished for a Fortune 500 company.

"At the end of the day, I think that rate, expense per hour, variety, speed and efficiency, that's still the (sales) driver. But I think individuals are becoming more knowledgeable about the sustainability of operations and how it affects the world." (Reporting By Allison Lampert, Editing by Tim Hepher and Alexandra Hudson)