By Allison Lampert

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

Fuel manufacturers and jetmakers are eager to showcase unique kinds of aviation fuel deemed less hazardous to the environment, from used cooking oil to the noticeably less attractive meat waste.

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

Their hope is that adopting sustainable fuel to suppress emissions might make service jets more appealing to environmentally mindful buyers - particularly corporations facing concerns over sustainability from investors or green project groups.

The availability of less polluting private jets could also spare the rich and popular the negative publicity experienced by Britain's Prince Harry and his partner Meghan over a recent private jet trip to southern France.

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

The most recent 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 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 screen are expected to be powered by 150,000 gallons of other renewable fuel blends anticipated to be pumped at the program.

FLIGHT SHAMING

Private jets account for less than 0.1% of overall annual carbon emissions worldwide, but can give off, on average, up to 20 times more carbon emissions per guest mile than jetliners, according to the London-based personal charter company Victor.

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

But planemakers state occurrences such as the furore over his itinerary have actually included fresh challenges for an industry already striving to justify its contribution to cutting business expenses.

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

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

But even an image remodeling - with jets sporting stickers like "this aircraft flies on eco-friendly fuels" and organisers adding alternative fuel pumps for visiting planes - is not likely to satisfy all critics at the Oct 22-24 high-end jet occasion.

Environmentalists and some analysts remain skeptical that biojetfuels, normally mixed 50-50 with kerosene, will make a substantial impact on public understandings about luxury travel.

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

Demand from business jet operators for eco-friendly fuels now far surpasses supply and their interest might drive future production, Sherbacow said.

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

Corporate charter companies and consultants are also seeing more interest from customers 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 role in a business jet utilization research study his company just recently finished 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 ending up being more mindful of the sustainability of operations and how it affects the world." (Reporting By Allison Lampert, Editing by Tim Hepher and Alexandra Hudson)