Application of N-doped fly ash materials with enhanced working capacity for post-combustion CO2capture

作者：Wang Peng; Zhao Chuanwen^*; Guo Yafei; Yan Junjie; Lu Ping

来源：11th Asia-Pacific Conference on Combustion, ASPACC 2017, 2017-12-10 to 2017-12-14.

• Biomass power plants
• Diethylenetriamine
• Ecological environments
• Elemental analyzers
• Fixed bed reactor
• Polyethyleneimine
• Regeneration behavior
• Tetraethylenepentamine

Large amounts of fly ashes produced from fossil flue-fired power plants potentially threaten the ecological environment. Recycling of the fly ashes as solid sorbents for pollutants control is an economical and environmentally friendly route. In this work, fly ashes (FAs) were modified with tetraethylenepentamine (TEPA), monoethanolamine (MEA), diethanolamine (DEA), polyethyleneimine (PEI), and diethylenetriamine (DETA) to synthesize solid sorbents with enhanced CO2 capture performances. The synthesized sorbents were characterized by N2 adsoption/despertion and elemental analyzer. CO2 capture behaviors of the synthesized sorbents were tested under 60oC, 20%CO2+15%H2O using a fixed-bed reactor, and sorbent regeneration behaviors were evaluated under 120oC, 10oC/min and 100%N2. The sorbent synthesized of ash collected from biomass power plants modified with TEPA (TEPA-FA-4) is identified as the optimum candidate with superior capability for CO2 capture and sorbent regeneration. The desired sorbent is demonstrated to be stable during 10 cyclic operations. The results of this work can be used as basic date for the technology of CO2 capture from flue gas in fossil flue-fired power plants using solid sorbents.

• 出版日期2017
• 单位南京师范大学