Alternative regeneration of chemicals employed in mineral carbonation towards technology cost reduction

摘要: Abstract Mineral carbonation (MC) using recyclable ammonium salts pH swing processes is considered among the most promising MC techniques to store CO 2 permanently. However, main key challenge use this process at large scale related energy consumption associated regeneration of employed additives and in particular separation salt be regenerated from water solution. This work investigates feasibility a liquid-liquid extraction technique replace intensive salts/water step. Also, -balance 500 MW coal-fired based power plant with an integrated facility was investigated. Different operating conditions were investigated, including temperature, reaction time, pressure, solid liquid ratio (S/L), reagents concentration stirring rate. An sulphate/water higher than 90% achieved 25 °C, 10 min, 1 bar, 200 g/l S/L ratio, 70% methanol and, 350 rpm. The calculated, resulting saving 35% comparison evaporation. resulted carbon negative when evaporation replaced by technique, 33% sequestered S/L ratios 300 g/l.