By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's biggest industry program in Las Vegas are drawing buyers with their smooth silhouettes, luxurious cabins - and progressively, their use of alternative fuels.

Fuel producers and jetmakers are eager to showcase novel types of air travel fuel deemed less harmful to the environment, from utilized cooking oil to the noticeably less glamorous meat waste.

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

Their hope is that embracing sustainable fuel to curb emissions might make service jets more attractive to environmentally mindful purchasers - particularly corporations facing questions over sustainability from investors or green project groups.

The schedule of less contaminating private jets might likewise spare the rich and popular the negative promotion experienced by Britain's Prince Harry and his better half Meghan over a current private jet journey to southern France.

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

The current waste-based fuels consist of "fats, grease and oils that are byproducts of the food industry," said Bryan Sherbacow, chief industrial officer of Boston-based biofuel producer 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 screen are anticipated to be powered by 150,000 gallons of other eco-friendly fuel mixes expected to be pumped at the show.

FLIGHT SHAMING

Private jets account for less than 0.1% of total yearly carbon emissions globally, however can produce, usually, up to 20 times more carbon emissions per traveler mile than jetliners, according to the London-based personal charter company Victor.

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

But planemakers state incidents such as the furore over his itinerary have actually included fresh obstacles for an industry currently striving to justify its contribution to cutting corporate costs.

"Incidents of flight shaming involving making use of personal jets are unfortunate when you consider that our industry has provided fuel efficiency enhancements of 40% over the past 40 years," stated Bombardier Aviation President David Coleal.

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

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

Environmentalists and some analysts stay skeptical that biojetfuels, typically mixed 50-50 with kerosene, will make a significant effect on public perceptions about luxury travel.

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

Demand from organization jet operators for sustainable 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 California plant, could broaden production up to 150 million gallons by 2022.

Corporate charter business 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 contributed in a business jet utilization research study his company just recently finished for a Fortune 500 business.

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