The Mineral Trapping of CO2 for Pyroclastic Rocks

Key words: 
• pyroclastic rocks

Abstract: The mineral trapping of CO2 refers to the atmospheric emissions of CO2 gas was injected into the formation of deep aquifers, oil and gas fields, via a series of physical and chemical reactions, CO2 gas will eventually be consolidated in the carbonate minerals. Pyroclastic rocks with high content of magnesium ions and easy to be released and abroad distributing can be used as a promising rock type for mineral trapping,Tongbomiao formation of Tanan sag in Tamuchage basin contain abundant dawsonitebearing volcaniclastic rocks,which further proves the mineral trapping capabilities of pyroclastic rocks .There are three carbonate minerals in pyroclastic rocks after the injection of CO2 , which contain dawsonite ,ferrocalcite and ankerite ,the total content is up to 30% ,which suggests the capacity of CO2 nineral trapping is large enough. 