System of utilizing carbon dioxide

A system of utilizing carbon dioxide, the system comprising:

• a carbon dioxide capturing device for capturing carbon dioxide;
• an electrochemical reaction device for producing synthetic gas by reducing the carbon dioxide captured by the carbon dioxide capturing device;
• a hydrogen carrier manufacturing device for manufacturing a hydrogen carrier material by using the synthetic gas produced by the electrochemical reaction device;
• a dehydrogenation device for producing hydrogen from the hydrogen carrier material manufactured by the hydrogen carrier manufacturing device;
• and
• a hydrogen utilization device for utilizing hydrogen produced by the dehydrogenation device,
• wherein the hydrogen carrier manufacturing device includes a multi-stage reactor for producing methanol by using carbon monoxide and hydrogen, which are produced as the synthetic gas in the electrochemical reaction device, and a product collector for collecting the methanol from the multi-stage reactor, and the product collector is connected with the dehydrogenation device to supply the methanol to the dehydrogenation device,
• wherein the dehydrogenation device further produces carbon dioxide from the methanol of the hydrogen carrier material and supplies the produced carbon dioxide to the carbon dioxide capturing device to recycle the carbon dioxide by circulating the carbon dioxide,
• wherein carbon dioxide is not supplied to the multi-stage reactor so that water is not produced as a product for the hydrogen carrier manufacturing device,
• wherein the product collector of the hydrogen carrier manufacturing device is directly connected with the dehydrogenation device without a separate separator,
• wherein the electrochemical reaction device includes a reduction electrode, an oxidation electrode, a separation membrane provided between the reduction electrode and the oxidation electrode,
• wherein the reduction electrode takes a tertiary aqueous amine solution, in which carbon dioxide is captured, and
• wherein the reduction electrode includes a reduction catalyst electrode having a structure in which mixed particles of nanostructured silver (Ag) and carbon are stacked on a hydrophilic carbon support coated with silver (Ag).