Backers of a third large oil refinery proposal for B.C.'s North Coast made some high-profile appointments Wednesday, naming former Assembly of First Nations national chiefs Shawn Atleo and Ovide Mercredi as advisors to their team.

, proposing what it calls the world's greenest refinery near Prince Rupert, announced the appointments Wednesday at a Vancouver Board of Trade event hosted by Stockwell Day, the former Conservative trade minister who has been the group's public face since August.

Pacific Future's proposal is similar to , a refinery bid launched in 2012 by David Black, chairman of Black Press. Both would be constructed from modules manufactured offshore to produce diesel, gasoline and other fuels for sale, avoiding the transport of heavy oil by tankers to reach export markets.

The third proposal is called Eagle Spirit Energy, headed by aboriginal author and lawyer Calvin Helin with financial backing from the Aquilini Group, the Vancouver family business that owns the Vancouver Canucks and extensive real estate and farm holdings.

a pipeline from the Alberta oil sands to an upgrader that would produce synthetic crude oil for export by tankers, likely from the Prince Rupert area.

Black announced last week that engineering firm Hatch Ltd. has completed a design and feasibility study for a refinery at an estimated cost of $22 billion, making it one of the 10 biggest in the world.

Black said in an interview he sees obvious similarities with the Pacific Future proposal, which describes new technology and carbon capture to reduce its environmental impact. Kitimat Clean proposes a new refining process that avoids production of petroleum coke, a coal-like byproduct of conventional heavy oil refining that is used as a high-carbon industrial fuel.

Black said his engineering report was prepared using proprietary and patented techniques, and won't be made public. He said the entry of Pacific Future, headed by an executive of Mexican conglomerate Grupo Salinas, shows the business case for a B.C. refinery is sound and there is capacity for more than one plant.

All proposals for B.C. North Coast refining require oil transport to the coast, either by rail or some version of the Enbridge Northern Gateway pipeline project, which received a federal environmental certificate this year and awaits approval by the federal cabinet.

All proposals also face opposition transport of heavy oil. Pacific Future has appointed Atleo as a senior advisor for partnerships, months after he was appointed by Vancouver Island University as an advisor for dialogue between First Nations, government and industry.