Process method and system for directly capturing carbon dioxide from air and converting and utilizing carbon dioxide

Through the adsorption, heating and desorption, electrocatalytic oxidation and Fischer-Tropsch synthesis reaction of the carbon dioxide trap in the air, high value-added products are generated, which solves the barriers in the existing technology that carbon dioxide utilization belongs to different industries, achieves full-chain optimization and cost reduction, and improves energy efficiency and economy.

CN120349809APending Publication Date: 2025-07-22SHANGHAI CARBON SHENG WANWU ENGINEERING TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202510615276.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-05-13
Publication Date
2025-07-22

AI Technical Summary

Technical Problem

In the prior art, direct air carbon capture and carbon conversion utilization belong to different industries. The full-chain industry lacks a synergistic and organic connection between upstream and downstream, and it is difficult to achieve optimization of the generation of carbon dioxide removal to high value-added products, and there are problems of high energy consumption and high cost.

Method used

By adsorbing the air through a carbon dioxide trap, heating and desorption, combining electrocatalytic oxidation to form synthesis gas, then isomerization through Fischer-Tropsch synthesis reaction and hydrocracking isomerization to form an isomerized oil and gas mixture, and finally gas-liquid separation and distillation are carried out to achieve efficient conversion of carbon dioxide into combustible gas and quality-enhancing oil products.

Benefits of technology

The full-chain optimization of carbon dioxide removal to the generation of high-value-added products has been achieved, reducing operating costs, improving energy efficiency and economy, promoting the deep integration of environmental protection and chemical energy industries, meeting cooling and thermal energy needs, and reducing wastewater consumption.

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Abstract

The invention provides a process method and system for directly capturing carbon dioxide from air and converting and utilizing the carbon dioxide. The process method comprises the following steps: adsorbing raw material gas through a carbon dioxide trapping device, and heating and desorbing to obtain purified carbon dioxide gas; the purified carbon dioxide gas and the electrolyte are subjected to electrocatalytic conversion to obtain synthesis gas, oxygen and condensate water, and the condensate water is recycled through water treatment operation to be used for supplementing the electrolyte; the method comprises the following steps: carrying out Fischer-Tropsch synthesis reaction, hydrocracking and isomerization reaction on synthesis gas to obtain an isomerized oil-gas mixture, wherein heat energy generated by the reaction provides heating desorption heat; and carrying out gas-liquid separation on the heterogeneous oil-gas mixture to obtain combustible gas and an upgraded oil product, carrying out rectification operation on the upgraded oil product to obtain an SAF component and a heavy oil product, and carrying out oxygen-enriched combustion reaction on the combustible gas and oxygen to provide heating desorption heat or supply required heat energy. An integrated and flexible industrial technology platform is developed, carbon capture and conversion processes are seamlessly connected, full-chain optimization from CO2 removal to high-added-value product generation is realized, and self heat energy requirements and wastewater utilization can be met.
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