Yangyang Guo

Title : Interactive adsorption mechanism and product distribution of impurity gases on CO2 adsorption over amine-grafted ZSM-5/SBA-16 adsorbent

Abstract:

Amine-grafted micro-mesoporous ZSM-5/SBA-16 adsorbents were synthesized in this work to improve the CO₂ adsorption capacity and investigate the effect of impurity gases on CO₂ adsorption. The interactive adsorption mechanism and the product distribution were systematically reported for the first time. A series of characterization methods, including X-ray diffraction (XRD), thermogravimetric analysis (TGA), N₂ adsorption and elemental analysis, were used to analyse the properties of the adsorbents. Amine grafting did not affect the crystal structure, and the organic amines were preferentially grafted to mesopores. ZS-A-2.0 had the highest CO₂ adsorption capacity of 41.39 mg/g and amine efficiency of 0.41. According to the co-adsorption experimental evaluation of multicomponent gases, the breakthrough curves of CO₂ exhibited two stages at low concentration, showing that physical and chemical adsorption occurred simultaneously during the whole adsorption process. H₂O obviously promoted CO₂ adsorption, while SO₂ played a negative role in CO₂ adsorption, especially its physical adsorption. According to temperature-programmed desorption (TPD) and in situ fourier transform infrared spectroscopy (FTIR) analysis results, CO₂ adsorption products have also been affected by impurity gases. The product of carbamate and (RNH₃)₂CO₃ increased by 19.6% in the presence of NO, while the CO₂ adsorption products were only 9.4% with SO₂ and H₂O. In addition, the interactive adsorption mechanism of CO₂ and impurity gases was further studied to support the actual flue gas application.

Audience Take Away

• Understand the design of novel CO₂ adsorption materials
• Learn the competitive adsorption mechanism of different gas components
• ​​​​​​​Directing CO₂ capture from industrial flue gas

Biography:

Dr. Guo was educated at Institute of Process Engineering, Chinese Academy of Sciences, where she earned her Ph. D degree in Environmental Engineering. For nine years, she worked on pollutants control and CO₂ capture for industrial flue gases, including six years as an associate professor with IPE working on catalyst technology and adsorption technology, directing research especially on SCR application and PSA capture technologies from flue gases.