CAJ | 학술논문

以天然石膏粉、膨润土（bentonite）和Fe（NO3）3·9H2O为原料，通过机械混合造粒法制备了钙基复合载氧体。在小型流化床反应器中，水蒸气作为气化-流化介质，研究了温度、活性组分含量及循环次数对复合载氧体反应活性的影响，同时考察了不同煤种化学链燃烧反应特性。实验结果表明，CaSO4含量为60％，Fe2 O3为活性助剂的CaS O4-Fe2 O3/ben（ Ca-Fe/ben）载氧体平均磨损速率为0．089％/h。反应温度为900℃时，碳转化率达到95％所需的时间为20．8 min，CO2平均干基浓度为95．99％，表现高的反应活性。10次氧化/还原反应后，CO2平均干基浓度保持在80％，载氧体保持良好的循环反应活性。同时，实验发现高挥发分高灰分的煤种更适于煤的化学链燃烧，且CO2浓度均保持在90％以上。粒径分布曲线表明循环反应中载氧体表现强的抗磨损能力。
이천연석고분、팽윤토（bentonite）화Fe（NO3）3·9H2O위원료，통과궤계혼합조립법제비료개기복합재양체。재소형류화상반응기중，수증기작위기화-류화개질，연구료온도、활성조분함량급순배차수대복합재양체반응활성적영향，동시고찰료불동매충화학련연소반응특성。실험결과표명，CaSO4함량위60％，Fe2 O3위활성조제적CaS O4-Fe2 O3/ben（ Ca-Fe/ben）재양체평균마손속솔위0．089％/h。반응온도위900℃시，탄전화솔체도95％소수적시간위20．8 min，CO2평균간기농도위95．99％，표현고적반응활성。10차양화/환원반응후，CO2평균간기농도보지재80％，재양체보지량호적순배반응활성。동시，실험발현고휘발분고회분적매충경괄우매적화학련연소，차CO2농도균보지재90％이상。립경분포곡선표명순배반응중재양체표현강적항마손능력。
A Ca-based compound oxygen carrier was prepared with industrial grade natural anhydrite, bentonite ( ben) and iron nitrates by using the mechanical mixing-prilling method.The experiments were carried out in a fluidized bed with steam as the gasification-fluidization medium.The influence of active component content, temperature as well as multi-cycle on the reactivity between CaSO4/bentonite and coal was investigated.The results show that the CaSO4 mass content of 60% and the adding Fe2 O3 can make a better reactivity and less attrition of the oxygen carrier particles.The attrition rate is 0.089%/h.The time to reach a carbon conversion of 95 %iss horteen d to 20 .8 min, and the averga e dry concetn ration of CO2 pa proaches 95.99%.Ten redox tests demonstrate that the concne tration of CO2 can be ek pt in 80%and the CaSO4-Fe2 O3/ben ( Ca-Fe/ben) oxygen carrier has a good cyclic stability.Mo reover, four typ es ofc oal are tested, indiac ting that teh coals with high volatiel content and high ahs content have higher combustion efficine cies with above90 % CO2 concentration in ag sification products ina ll cases.