关键词: 传质, 二氧化碳捕集, 分离, 膜, 烟道气, 胺基材料

Abstract:

Membrane technology for carbon capture is vital to achieve the goal of carbon emission reduction, but limited by the material, the separation performance of membrane materials has upper bound. Amine-based materials can react reversibly with CO₂ and dramatically improve the separation performance of membrane materials, and are often introduced into membrane systems as carriers to facilitate mass transfer. In this paper, the mechanism of promoting the mass transfer of CO₂ by amine-rich membrane was introduced, and the four types of methods (coating, reaction, grafting and doping) for introducing amine-rich materials into the membrane matrix were summarized. The advantages and disadvantages of the four types of methods were analyzed and the performance of the four types of methods for preparing separation membranes was summarized. This paper showed that the mechanism of amine-based materials for CO₂ mass transfer needed to be further explored. It was emphasized that the development of materials with high amino density and the introduction of amino materials into membrane matrix in a more firm way were the future key development directions. The utilization of machine learning to improve the efficiency of membrane material design had guided the development of the field. This work indicated that the performance stability of amine-based membrane materials, equipment stability and process stability under real operating conditions were areas of concern, and that the establishment of a complete amine-based membrane method CO₂ capture technology chain still faced huge challenges.

Key words: mass transfer, CO₂ capture, separation, membranes, flue gas, amine-rich materials