中文摘要：

钙基吸收剂循环煅烧/碳酸化反应是燃煤电站捕获CO2的最有效方法之一。为了解决吸收剂在吸收CO2过程中随着反应次数增加碳酸化能力迅速衰减的问题,采用溶胶凝胶燃烧合成法分别制备了2种复合钙基吸收剂：CaO/MgO（摩尔比10 1）和CaO/MnO2（摩尔比100 2）。研究不同反应条件对吸收剂循环碳酸化特性的影响,获得了最佳反应条件。研究表明,该方法制备的吸收剂微观结构蓬松,碳酸化性能大幅度提高,2种吸收剂随循环次数的增加转化率衰减缓慢,经过50次反应转化率仍高达0.792和0.758,约为石灰石的2.26和2.17倍。

英文摘要：

The cyclic calcination/carbonation reaction of calcium-based sorbents is one of the most effective approaches for CO2 capture for coal-fired power plants.Two kinds of calcium-based sorbents with mole ratios of [CaO]/[MgO] 10 1 and [CaO]/[MnO2] 100 2 were synthesized by sol-gel process to solve the problem of sharp decay in carbonation conversion efficiency after many calcination/carbonation cycles.The carbonation properties of the sorbents were investigated under different reaction conditions and the best reaction condition under which the highest carbonation rate achieved was found.The experimental results indicate that a hollow and abounding microstructure in the calcium-based sorbents synthesized by sol-gel process is the reason for the improved carbonation performance.The carbonation conversion rates of the synthesized sorbents are up to 0.792 and 0.758,2.26 and 2.17 times of the raw CaCO3 sorbent,respectively,after 50 calcination/carbonation cycles.