Results from trialling aqueous NH3 based post-combustion capture in a pilot plant at Munmorah power station: Absorption

Aqueous Ammonia (NH3) Based Post Combustion CO2Capture: A Review

“…However, it is not clear about possible side effect of introduction of additives. New processes such as high pressure absorption, rich solvent split, re-engineering of the industrial ammonium bicarbonate fertilizer production process and combined capture of CO 2 , SO 2 and other impurities could offer potential for improvement (Yu et al, 2011a;Zhuang et al, 2012). All these research efforts are the early stage of the development.…”

“…Mass transfer coefficients are used to assess the CO 2 absorption rates in the solvents. The bench scale studies using wetted wall column and pilot plant studies all suggest that CO 2 mass transfer coefficient in aqueous ammonia are lower than those in MEA (Yu et al, 2011a(Yu et al, , 2012b. Figure 6 shows Figure 5 Reaction scheme, including all reactions between ammonia, the CO 2 /carbonate group, and protons .…”

“…The major difference is that in the CSIRO research, the desorption takes place under medium pressure and the process combines SO 2 removal and ammonia slip reduction (Yu et al, 2011a(Yu et al, , 2012a while RIST is developing technology for CO 2 capture from Blast Furnace Gas (BFG) generated from iron and steel making process. The process utilises the unrecovered waste heat from a steelmaking process for solvent regeneration and ammonia recovery at low temperatures (Rhee et al, 2011).…”

“…Alstom, Powerspan, CSIRO and KIST (Korean Research Institute of Industrial Science & Technology) are the major players in this area and have tested the technologies at pilot-plant scale (McLarnon and Duncan, 2009;Rhee et al, 2011;Telikapalli et al, 2011;Yu et al, 2011a).…”

“…Solvent flow-rate = 134 L/min; Gas flow-rate = 640-820 kg/h; CO 2 in the flue gas = 8-10 vol%. Inner diameter of absorber 1 = 0.6 m; packing height = 3.8 m (Yu et al, 2011a).…”