All I get when I search that are some press releases from researchers. Where is the actual installation? What’s the actual cost? Does the cost scale linearly to

All I get when I search that are some press releases from researchers. Where is the actual installation? What’s the actual cost? Does the cost scale linearly to gigatonnes, or e.g. does it require some chemicals that are cheap now but wouldn’t be so cheap if we needed much more of them?