Patents: Carbon sinks

日期:2019-03-03 01:04:10 作者:易暄 阅读:

Ways of trapping the carbon dioxide gas produced by power stations so that it does not worsen the greenhouse effect has been occupying minds at the Nagasaki Technical Institute. Now the Japanese company Mitsubishi has patented one of their ideas (European patent application 408 979). A frequent suggestion has been to collect the gas, liquify it under pressure and then freeze it into dry ice and dump it in the sea. But dry ice evaporates quickly, so a lot is lost on the journey out to sea. What remains evaporates furiously as soon as it hits the sea water. So most of the gas escapes into the atmosphere. The Nagasaki researchers suggest transporting liquified gas out to a tethered marine float. The float has a hopper and pipe which extends to a depth of around 3000 metres. The liquid carbon dioxide is simply poured down the tube. As it falls it gradually evaporates,