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Abstract

Disclosed are a method and an apparatus for carbon capture coupled hydrogen production. The method includes: capturing low-concentration CO₂ by a solution of an alkali metal hydroxide to obtain a low-concentration CO₂ absorption solution; capturing high-concentration CO₂ by a first portion of the low-concentration CO₂ absorption solution to obtain a high-concentration CO₂ absorption solution; and performing electrolysis by a second portion of the low-concentration CO₂ absorption solution as a catholyte solution, using the high-concentration CO₂ absorption solution as an anolyte, and using a non-ionic diaphragm as a diaphragm. According to the method, capture of CO₂ in a wide concentration range can be realized; electrolysis is performed by a non-ionic diaphragm, to implement regeneration of an absorption solution coupled hydrogen production; capture costs of CO₂ in a wide concentration range can be reduced; additional products of H₂ and O₂ can be obtained; and hydrogen production costs can be reduced.

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First Claim