TEPA/Q-10固态胺的脱碳性能

引言近年来随着全球变暖和气候变化,温室气体CO2的排放和控制日益受到人们的关注,CO2的捕集和封存(carbon capture and storage,CCS)技术是减排CO2的一种有效手段,其中CO2的捕集成本约占CCS总成本的75%1-2]。来自化石燃料燃烧发电排放的CO2约占世界CO2总排放量的

Performance of solid amine TEPA/Q-10 for CO2 removal

Low-cost solid amine TEPA/Q-10 was prepared by impregnating a cheap and disordered porous silica gel Q-10 in tetraethylenepentamine(TEPA)to investigate sorption and regeneration performance during multi-cycles for CO2 removal.Effects of temperature(50—70℃)and CO2 concentration on sorption performance as well as its thermal stabilization at various temperature were studied during 15 cycles.The experiment results indicate that sorption capacity of this sorbent can reach up to 2.5 mmol·(g sorbent)-1 and it is insensitive for change of temperature and CO2 concentration.TEPA/Q-10 shows perfect thermal stabilization at <100℃,but its sorption capacity will decrease with increase of cycle times when regeneration temperature is above 100℃,mainly due to the volatilization of TEPA in the sorbent instead of its structure change.Compared with traditional MEA method,energy consumption of solid amine decreases exponentially with increase of delta sorption capacity,and can be reduced by approximately 50% when delta sorption capacity is up to 2.5 mmol·(g sorbent)-1.However,if it is above 3.0 mmol·(g sorbent)-1 the energy consumption decreases only slightly with its increase.