A system configured to maintaining a desired pressure in a discharging intermediate LCO 2 tank during discharging of LCO 2 from the tank thereby avoiding formation of dry ice in the intermediate LCO 2 storage tank during the LCO 2 discharge from the tank, which system avoids or reduces the risk of formation of hydrates in the system from water contained in the LCO 2, comprising: - an intermediate LCO 2 storage tank; - an LCO 2 discharge conduit (41, 43, 51, 53, 55, 30; 41, 43, 61, 62, 63, 65, 30; 41, 43, 61, 62, 73, 74, 30) connected to the intermediate LCO 2 storage tank configured to discharge LCO 2 to be injected into a long-term CO 2 storage; - a first LCO 2 pump arranged along the discharge conduit (41, 43, 51, 53, 55, 30; 41, 43, 61, 62, 63, 65, 30; 41, 43, 61, 62, 73, 74, 30); - an injection pump arranged along the discharge conduit (41, 43, 51, 53, 55, 30; 41, 43, 61, 62, 63, 65, 30; 41, 43, 61, 62, 73, 74, 30) downstream of the first LCO 2 pump; - an LCO 2 heater arranged along the discharge conduit (41, 43, 51, 53, 55, 30; 41, 43, 61, 62, 63, 65, 30; 41, 43, 61, 62, 73, 74, 30) downstream of the LCO 2 injection pump; characterized in additionally comprising, - a tank heater configured to receive and to transfer heat from a fluid stream being led through the tank heater to the contents of the intermediate storage tank; - an LCO 2 slip stream conduit (57; 67, 68, 66; 75, 79, 68, 66) arranged along the discharge conduit (41, 43, 51, 53, 55, 30; 41, 43, 61, 62, 63, 65, 30; 41, 43, 61, 62, 73, 74, 30) located downstream of the LCO 2 heater configured to withdraw and convey, as the fluid stream, a slip stream in conduit (57; 67, 68, 66; 75, 79, 68, 66) to the tank heater from the discharge conduit (41, 43, 51, 53, 55, 30; 41, 43, 61, 62, 63, 65, 30; 41, 43, 61, 62, 73, 74, 30); and, - a slip stream exit conduit (59; 69) configured to convey a fluid stream effluent from the tank heater to the discharge conduit (41, 43, 51, 53, 55, 30; 41, 43, 61, 62, 63, 65, 30; 41, 43, 61, 62, 73, 74, 30) at a location downstream of the first LCO 2 pump. - an intermediate LCO 2 storage tank; - an LCO 2 discharge conduit (41, 43, 51, 53, 55, 30; 41, 43, 61, 62, 63, 65, 30; 41, 43, 61, 62, 73, 74, 30) connected to the intermediate LCO 2 storage tank configured to discharge LCO 2 to be injected into a long-term CO 2 storage; - a first LCO 2 pump arranged along the discharge conduit (41, 43, 51, 53, 55, 30; 41, 43, 61, 62, 63, 65, 30; 41, 43, 61, 62, 73, 74, 30); - an injection pump arranged along the discharge conduit (41, 43, 51, 53, 55, 30; 41, 43, 61, 62, 63, 65, 30; 41, 43, 61, 62, 73, 74, 30) downstream of the first LCO 2 pump; - an LCO 2 heater arranged along the discharge conduit (41, 43, 51, 53, 55, 30; 41, 43, 61, 62, 63, 65, 30; 41, 43, 61, 62, 73, 74, 30) downstream of the LCO 2 injection pump; - a tank heater configured to receive and to transfer heat from a fluid stream being led through the tank heater to the contents of the intermediate storage tank; - an LCO 2 slip stream conduit (57; 67, 68, 66; 75, 79, 68, 66) arranged along the discharge conduit (41, 43, 51, 53, 55, 30; 41, 43, 61, 62, 63, 65, 30; 41, 43, 61, 62, 73, 74, 30) located downstream of the LCO 2 heater configured to withdraw and convey, as the fluid stream, a slip stream in conduit (57; 67, 68, 66; 75, 79, 68, 66) to the tank heater from the discharge conduit (41, 43, 51, 53, 55, 30; 41, 43, 61, 62, 63, 65, 30; 41, 43, 61, 62, 73, 74, 30); and, - a slip stream exit conduit (59; 69) configured to convey a fluid stream effluent from the tank heater to the discharge conduit (41, 43, 51, 53, 55, 30; 41, 43, 61, 62, 63, 65, 30; 41, 43, 61, 62, 73, 74, 30) at a location downstream of the first LCO 2 pump.