关键词: 固态胺, 四乙烯五胺, 挥发, 能耗

Abstract: 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.

Key words: solid amine, TEPA, volatilization, energy consumption