An Experimental System for Rock Corrosion by Supercritical Carbon Dioxide

An experimental system for assaying rock corrosion in supercritical carbon dioxide, comprising a corrosion vessel (1), wherein:

• the corrosion vessel (1) contains saturated carbon dioxide aqueous solution;
• a top opening of the corrosion vessel (1) is connected with a sealing cover;
• the corrosion vessel (1) is provided with a heating assembly and contains a rock sample placement rack;
• a top of the rock sample placement rack is located above the liquid level of the saturated carbon dioxide aqueous solution, and a bottom of the rock sample placement rack is submerged in the saturated carbon dioxide aqueous solution;
• the heating assembly is arranged on a perimeter wall of the corrosion vessel (1) and connected with a controller (6);
• the controller (6) regulates the temperature of the heating assembly, and is capable of regulating the temperature of the heating assembly to provide conditions for maintaining a carbon dioxide supercritical state;
• the corrosion vessel (1) is connected with a carbon dioxide gas conveying unit through a conveying pipe, and the carbon dioxide gas conveying unit comprises:
• a gas source storage tank (5) configured to supply carbon dioxide gas, wherein the gas source storage tank (5) has a gas outlet;
• a gas booster pump assembly, configured to provide conditions for maintaining a supercritical state of carbon dioxide, wherein the gas booster pump assembly and the gas outlet are connected through a pipeline, and the gas booster pump assembly is connected to the conveying pipe;
• the corrosion vessel (1) comprises two independent corrosion chambers, a first corrosion chamber and a second corrosion chamber, and the first corrosion chamber and the second corrosion chamber are both configured to contain saturated carbon dioxide aqueous solution;
• at least two rock sample placement racks are provided, and each rock sample placement rack is respectively provided in the first corrosion chamber and the second corrosion chamber;
• the sealing cover includes a first sealing cover (2) and a second sealing cover (101);
• the first sealing cover (2) is threadedly connected to the top opening of the first corrosion chamber, and the second sealing cover (101) is threadedly connected to the bottom opening of the second corrosion chamber;
• the delivery pipe includes a first transmission pipe and a second transmission pipe;
• the first transmission pipe and the second transmission pipe are both connected to the gas booster pump assembly through a pipeline;
• the first transmission pipe passes through the first sealing cover (2) and is connected to the first corrosion chamber, and the second transmission pipe is connected to the second corrosion chamber.