Embodiments of systems and methods for transporting fuel and carbon dioxide (CO2) in a dual-fluid vessel thereby minimizing transportation between locations are disclosed. In an embodiment, the dual-fluid vessel has an outer shell with two or more inner compartments, positioned within the outer shell, including a first inner compartment for storing CO2 and a second inner compartment for storing fuel. The dual-fluid vessel may connect or attach to a transportation vehicle to thereby allow transportation of the fuel and CO2. Insulation may provide temperature regulation for the fuel and CO2 when positioned in the respective first and second inner compartments. One or more ports having an opening in and through the outer shell and a fluid pathway to one or more of the first inner compartment or the second inner compartment may provide fluid communication through the opening and fluid pathway for loading/offloading the fuel and/or CO2.

A pneumatic tank trailer that is structurally reinforced in a fuel efficient manner. The trailer includes a tank defined by hoppers and tank walls. Internal frames are joined to the tank at locations where adjacent hoppers meet. The frames extend circumferentially around the tank interior. In some embodiments, the frames are multi-piece assemblies. In certain embodiments, each frame includes a cross joist portion extending between opposite tank sides at a location spaced apart from the top and bottom of the tank. In some embodiments, front and rear frames include an internal portion that extends along the sides and top of the tank and an external portion that extends underneath the tank.

Embodiments of systems and methods for transporting fuel and carbon dioxide (CO2) in a dual-fluid vessel thereby minimizing transportation between locations are disclosed. In an embodiment, the dual-fluid vessel has an outer shell with two or more inner compartments, positioned within the outer shell, including a first inner compartment for storing CO2 and a second inner compartment for storing fuel. The dual-fluid vessel may connect or attach to a transportation vehicle to thereby allow transportation of the fuel and CO2. Insulation may provide temperature regulation for the fuel and CO2 when positioned in the respective first and second inner compartments. One or more ports having an opening in and through the outer shell and a fluid pathway to one or more of the first inner compartment or the second inner compartment may provide fluid communication through the opening and fluid pathway for loading/offloading the fuel and/or CO2.

An apparatus for use in an elongated shipping container for selectively carrying solid freight and bulk liquid freight comprising a frame fixedly secured to the elongated shipping container, the frame comprising at least: two side members and at least one end member connected to the side members, a collapsible liquid container removably connected to the frame, the container having a liquid impermeable outer liner and a liquid impermeable inner bladder arranged within the outer liner, a fluid conduit in fluid communication with the inner bladder and removably connected to the frame, and at least one baffle operatively arranged to removably secured to the frame and on top of the collapsible liquid container.