CAJ | 학술논문

针对多循环反应过程中钙基吸收剂的CO2吸收能力随循环次数增加而迅速衰减的问题,采用溶胶-凝胶燃烧法,在不同前驱体溶液pH值条件下制备CaO/MgO吸收剂,并在卧式固定床反应器上进行了20次循环的煅烧/碳化试验,对其吸收CO2的活性及循环反应稳定性进行了研究.结果表明：采用溶胶-凝胶法合成的CaO/MgO吸收剂与干物理混合法及湿化学法合成的相比,具有更好的CO2吸收性能;对于采用尿素溶胶-凝胶燃烧法合成的CaO/MgO吸收剂,前驱体溶液pH值越小,制备的CaO/MgO吸收剂颗粒越小,比表面积越大,CO2吸收能力越高.
침대다순배반응과정중개기흡수제적CO2흡수능력수순배차수증가이신속쇠감적문제,채용용효-응효연소법,재불동전구체용액pH치조건하제비CaO/MgO흡수제,병재와식고정상반응기상진행료20차순배적단소/탄화시험,대기흡수CO2적활성급순배반응은정성진행료연구.결과표명：채용용효-응효법합성적CaO/MgO흡수제여간물리혼합법급습화학법합성적상비,구유경호적CO2흡수성능;대우채용뇨소용효-응효연소법합성적CaO/MgO흡수제,전구체용액pH치월소,제비적CaO/MgO흡수제과립월소,비표면적월대,CO2흡수능력월고.
Aiming at the problem that the capture capacity of CaO-based absorbent reduces rapidly after multiple cycles,a number of CaO/MgO sorbents were synthesized using sol-gel combustion method under various pH conditions of precursor,of which the activity and stability in cyclic reaction of CO2 capture were investigated by 20 cycles of carbonation/calcination reaction experiment in a fixed bed reactor.Results show that the capture capability of CaO/MgO sorbent prepared by sol-gel combustion method is stronger than that prepared by dry physical mixing and wet chemical synthesis method.For CaO/MgO sorbents prepared by urea sol-gel combustion method,the less the pH value of precursor,the smaller the particle size and the larger the specific surface urea is,the stronger the absorbing capability will be.