摘要
基于TG-FTIR联用技术,结合SEM-EDX、XRD和XPS等表征手段,深入研究了煤与烟气脱硫渣制备的CaSO_(4)-Mn_(3)O_(4)混合氧载体的反应特性,重点关注Mn_(3)O_(4)对CaSO_(4)反应活性的提升及其对CaSO_(4)副反应过程气相硫释放的抑制,发现CaSO_(4)-Mn_(3)O_(4)氧载体与煤反应时,通过独特的氧传递特性和利用途径,不仅实现了CaSO_(4)中晶格氧的充分利用、促进煤的高效转化和CO_(2)的有效捕集,还能够抑制并定向脱除CaSO_(4)副反应释放的SO_(2)。最后,热力学模拟发现,在优化反应条件下,SO_(2)的排放比例不高于1%,相比于不加Mn_(3)O_(4)时的2.4%,在抑制和捕集SO_(2)方面具有显著提高。
The reaction characteristics of coal with CaSO_(4)-Mn_(3) O_(4) mixed oxygen carrier derived from flue gas desulfurization(FGD)slag were investigated based on TG-FTIR,in combination with SEM-EDX,XRD and XPS,with the focus on the role of the doped Mn_(3) O_(4) to enhance the CaSO_(4) reaction activity and inhibit the gaseous sulfur emission.During the reaction of CaSO_(4)-Mn_(3) O_(4) oxygen carrier with coal,unique oxygen transfer characteristics and oxygen utilization pathways were revealed,which not only promoted the full utilization of lattice oxygen in CaSO_(4),suficient conversion of coal and effective capture of CO_(2),but also achieved the desired suppression and directional removal of the SO_(2) released by the side reactions of CaSO_(4).Finally,thermodynamic simulation of YN coal reaction with the mixed oxygen carrier showed that under the optimized reaction condition,the emission ratio of SO_(2) was less than 1%,compared with 2.4%without Mn_(3) O_(4) addition,which has a significant improvement in both SO_(2) inhibition and retention.
作者
王保文
李贺宇
梁彦琛
蔡中元
姜涛
吕灵灵
丁宁
WANG Bao-Wen;LI He-Yu;LIANG Yan-Chen;CAI Zhong-Yuan;JIANG Tao;LV Ling-Ling;DING Ning(College of Electric Power,North China University of Water Resources and Electric Power,Zhengzhou 450045,China;Hebei Ji-Yan Energy Science and Technology Research Institute,Shijiazhuang 050000,China)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2021年第5期1342-1351,共10页
Journal of Engineering Thermophysics
基金
国家自然科学基金(No.51776073)
河南省科技攻关项目(No.162102210233)
华北水利水电大学创新计划重点项目(No.2019XA014)。
