Carbon Dioxide Recovery Without Gas Compression

The patent utilizes the phase transition of carbon dioxide from gas to liquid state by controlling temperature and pressure conditions. The condensation device cools the carbon dioxide-containing gas to condense it into liquid form, achieving high-density storage without requiring mechanical compression. This phase change approach directly resolves the contradiction by providing dense storage (improving parameter 26) while avoiding compression-induced waste heat (preventing deterioration of parameter 22).

The system changes the physical parameters of carbon dioxide, specifically temperature and pressure, to achieve liquid-phase storage. By cooling the gas below its critical temperature and maintaining appropriate pressure, the carbon dioxide transitions to a liquid state with higher density. This parameter change strategy enables high-density storage without the energy losses associated with mechanical compression processes.

The patent replaces mechanical compression with a membrane-based separation system for carbon dioxide recovery. The membrane reactor uses selective permeation properties to separate carbon dioxide from the gas mixture, achieving high recovery completeness. This substitution of the mechanical compression system with a membrane separation system resolves the contradiction by enabling complete recovery (improving parameter 23) while relying on the membrane's inherent selectivity properties rather than mechanical separation methods.

The invention employs porous membrane materials with specific pore structures and surface properties that enable selective passage of carbon dioxide molecules. These porous materials provide the necessary separation selectivity based on molecular size, shape, and interaction properties, allowing high-purity carbon dioxide recovery while maintaining complete separation from other gas components.

The system implements self-service through the carbon cycle, where the carbon dioxide recovered from fuel combustion is directly fed back into the synthesis reactor for producing new fuel. This closed-loop approach eliminates the need for external carbon sources and minimizes energy losses by reusing the carbon component internally. The membrane separation and condensation processes are integrated into the cycle, enabling the system to maintain high energy efficiency while preserving large energy storage capacity.

The invention establishes continuous operation of the carbon-based energy storage system, where carbon dioxide recovery, condensation, and re-synthesis occur in an uninterrupted cycle. The membrane reactor continuously separates carbon dioxide, the condensation device continuously converts it to liquid form, and the synthesis reactor continuously produces fuel. This continuity eliminates idle periods and maximizes energy efficiency while maintaining full energy storage capacity throughout operation.