Abstract The capture and sequestration of carbon dioxide (CO 2 ) has drawn significant attention due to the devastation arising from the effects of global warming. This comes from the increasing demand for the transportation of various commodities to meet the needs of the growing population of the world. Onboard capture of CO 2 in ships has attracted much attention but suffers due to the high cost of implementation and technical setbacks. This report outlines the challenges of the current CCS technology implemented in maritime operations and evaluates porous materials (MOFs, PPNs, COFs) as a novel material class for the next generation of onboard CO 2 capture. Engineering challenges are discussed that can create better synergies of integration in this space, and specific advanced porous materials are suggested that show great promise. If this technology can be implemented onboard vessels, it will greatly help the maritime industry adhere to internationally mandated emission regulations.