Research progress in catalytic purification of gaseous pollutants by flexible supported catalysts

At present, air pollution such as haze has attracted great attention. Using efficient and inexpensive catalytic purification materials is one of the cores of pollution control technologies, and the development is of great significance. The novel monolithic catalyst prepared from flexible materials has become an emerging hot spot because of its high catalytic activity, simple processing and molding, flexible application, and easy in-situ regeneration. This paper describes the characteristics and applications of the catalysts based on flexible materials such as metal foams, organic foams and fibers. The typical synthesis process of the above flexible supported catalysts and their catalytic performance and the purification mechanism for gaseous pollutants (such as NOx, toluene, formaldehyde, etc.) are highlighted. The application results of flexible supported catalysts in the field of denitrification are reviewed, including the mechanism of sulfur and water resistance, the synergistic dedusting and denitrification capacity of fiber filter catalysts and the high catalytic performance of carbon foam catalysts. By summarizing and analyzing the research results, application status and practical application of flexible supported catalysts, we further prospect the research direction, emphasis and difficulty in the field of environmental catalytic purification. improving the catalyst's cohesiveness, activity, stability and matching design and optimization of moving bed reactor-catalyst will be the focus of the research and development of flexible and efficient integrated catalysts. Such catalysts could provide technical supports for the catalytic purification of the tail gas from small and medium-sized coal-fired furnaces. © 2019, Chemical Industry Press. All right reserved.