The energy company has already been operating its Quest CCS facility in Alberta for six years. PHOTO: Shell Canada Ltd. CALGARY—Shell Canada Ltd. has announced plans to build a large-scale carbon capture and storage project at its Scotford Complex near Edmonton, part of its strategy to become a net-zero emissions company by 2050. The proposed Polaris CCS project will capture carbon dioxide from the Shell-owned Scotford refinery and chemicals plant, the company said Tuesday, adding it expects Polaris to have storage capacity of about 300 million tonnes of C02 over the life of the project. Shell said it will make a final investment decision about the project in 2023, with the initial phase expected to start operations around the middle of the decade.