By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's most significant industry program in Las Vegas high-end jets are drawing purchasers with their sleek silhouettes, luxurious cabins - and progressively, their use of alternative fuels.

Fuel producers and jetmakers are keen to showcase unique types of air travel fuel considered less damaging to the environment, from oil to the clearly less glamorous meat waste.

Business jet operators, like airline companies, have actually acquiesced environmental pressure on aviation and dedicated to halving carbon emissions by 2050 compared to 2005.

Their hope is that adopting sustainable fuel to curb emissions might make service jets more appealing to ecologically mindful buyers - specifically corporations dealing with concerns over sustainability from investors or green project groups.

The accessibility of less contaminating personal jets might likewise spare the abundant and well-known the negative publicity experienced by Britain's Prince Harry and his partner Meghan over a current private jet journey to southern France.

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

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

"All of our item is inedible."

Some of the other 79 aircraft on screen 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 yearly carbon emissions internationally, however can emit, on average, as much as 20 times more carbon emissions per passenger mile than jetliners, according to the London-based private charter company Victor.

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

But planemakers state incidents such as the furore over his itinerary have added fresh obstacles for a market currently aiming to validate its contribution to cutting business costs.

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

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

But even an image makeover - with jets sporting stickers like "this aircraft flies on sustainable fuels" and organisers including alternative fuel pumps for checking out aircrafts - is not likely to satisfy all critics at the Oct 22-24 high-end jet event.

Environmentalists and some experts stay hesitant that biojetfuels, usually combined 50-50 with kerosene, will make a substantial influence on public understandings about high-end travel.

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

Demand from business jet operators for eco-friendly fuels now far goes beyond supply and their interest could drive future production, Sherbacow stated.

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

Corporate charter companies and specialists are also seeing more interest from consumers who wish to buy carbon credits to offset emissions from their flights.

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

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