硝酸锰对钙基吸收剂循环煅烧/碳酸化捕集CO2的影响

采用Mn(NO 3) 2对钙基CO 2吸收剂进行浸渍改性。在常压双固定床煅烧/碳酸化反应器系统上，研究了改性钙基吸收剂循环煅烧/碳酸化捕集CO 2的反应特性，并分析了其在循环反应中的微观结构。结果表明：Mn/Ca摩尔比、碳酸化温度、煅烧温度等对改性吸收剂循环捕集CO 2特性有较大影响。Mn/Ca摩尔比为1.0∶100和700 ℃碳酸化时，改性吸收剂可获得最大碳酸化转化率，高于相同反应条件下的未处理吸收剂的转化率；Mn(NO 3) 2的加入提高了吸收剂在高煅烧温度（>950 ℃）下的抗烧结性能；经Mn(NO 3) 2改性后吸收剂煅烧产物的孔隙结构得到了改善，这有利于CO 2的循环捕集。

Effect of manganese nitrate on calcination/carbonation for CO_2 capture using calcium-based sorbent

Mn(NO 3) 2 doped CaO based sorbents were synthesized by the wet impregnation method.The effect of manganese nitrate on cyclic capture of CO 2 using Ca based sorbent was investigated in the atmospheric two fixed calcination/carbonation reactor system.The results show that operating parameters including molar ratio of Mn to Ca，carbonation temperature and calcination temperature have great influence on the carbonation conversions of the treated sorbent.When the molar ratio of Mn to Ca is 1.0∶100 and the carbonation temperature is 700 ℃，the treated sorbent achieves the greatest conversion，which is higher than the untreated sorbent at the same conditions.The anti sintering performance at high calcination tempreture(>950 ℃) is enhanced by treating the sorbent with manganese nitrate.The pore structure is improved with the addition of manganese nitrate，and that is beneficial to cyclic CO 2 capture.