 The first evidence for the existence of CO2 hydrates dates back to the year 1882, when Zygmunt Florenty Wróblewski reported clathrate formation while studying carbonic acid.He noted that gas hydrate was a white material resembling snow, and could be formed by raising the pressure above a certain limit in his H2O - CO2 system.He was the first to estimate the CO2 hydrate composition, finding it to be approximately CO2•8H2O.