Abstract. The increasingly serious greenhouse effect makes people pay more attention to the capture and storage technology of CO 2 . Metal organic frameworks (MOFs) have the advantages of high specific surface area, porous structure and controllable structure, and become the research focus of CO 2 emission reduction technology in recent years. In this paper, the characteristics, preparation methods and application of MOFs in the field of CO 2 adsorption and separation are discussed, especially the application of flue gas environment in power plants.
IntroductionSince the industrial revolution, the global economy has developed by leaps and bounds, the rapid development of economy in human society consumes a large amount of fossil energy, so that the content of atmospheric CO2, NOx, CH4 and other gases increased dramatically, which increased CO2 content led to a severe global greenhouse effect. CO2 capture and storage (CCS) is the primary task of controlling CO2 emissions and mitigating the greenhouse effect.The traditional materials for absorption and capture of CO2 by physical or chemical methods mainly include activated carbon, zeolite molecular sieve, liquid ammonia, amino liquid, metal oxide and solid materials containing lamination functional groups. In view of the existing problems and shortcomings of existing CO2 capture materials, the appearance of a new material-metal-organic frameworks (MOFs) has improved the current situation of CO2 capture and storage technology in recent years. MOFs are inorganic metal centers (metal ions or clusters of metal) and bridged organic ligands that are interconnected by self-assembly to form a class of crystalline porous materials with periodic network structures. Most of these metal organic frameworks have high porosity and good chemical stability.Because of the structure of the hole and the large surface area, MOFs have a wider application prospect, such as gas adsorption separation, catalyst, and optical materials. Most of the MOFs have good selectivity, good adsorption capacity, excellent stability and reproducibility compared with traditional materials [1,2], and most of their adsorption mechanisms are physical adsorption.The discovery of MOFs was derived from the study of Prussian blue-Fe coordination polymers [3]. After a variety of coordination polymers, the final 3)](DMF)8(C6H5Cl)(H2BDC = 1,4-phthalic acid, DMF = N, N-dimethy lformamide)) was proposed by Yaghi et al., followed by new CO2 adsorption properties of different functional groups with different functional groups organic skeleton compounds continue to appear, such as ZIF series, MIL series, so on. As the geometric composition of materials, size and function can be flexible changes, more than 2000 MOFs structures