摘要
气煤是储量最丰富的炼焦煤,科学地评价其容惰能力对于提高气煤在配煤炼焦中的使用及降低配煤成本具有重要意义。本文将抚顺气煤的镜质组富集纯化后配入惰性组分(标准无烟煤)炼焦,以焦炭的气化反应特性评价抚顺气煤镜质组的容惰能力,并提出综合气化特性指数(G)、气化起始指数(G_s)、气化终止指数(G_d)3个指数考察焦炭的气化反应特性。研究结果表明,G、G_s、G_d随惰性组分的增加呈减小的趋势,且惰性组分质量分数为40%时,G、G_s、G_d出现骤降。运用Ozawa积分法计算气化活化能表明惰性组分配入量在20%~60%时,40%惰性组分的活化能相对较大。XRD和SEM分析也表明,惰性组分质量分数为40%时,所得焦炭基质致密均匀,芳香度大,晶格缺陷少。所以,抚顺气煤镜质组配入惰性组分的极限值是40%。
Gas coal is the most abundant coking coal reserves.The scientific evaluation of the inert-tolerant capacity of gas coals is of great significance to increase the proportion of gas coal in coal blending and reduce the cost of coal blending.The vitrinite obtained from Fushun gas coal was added to inert component（the standard anthracite）to prepare cokes.The characteristics of coke-CO_2gasification were studied to evaluate the inert-tolerant capacity of vitrinite from Fushun gas coal.The comprehensive gasification index（G）,gasification start index（G_s）and gasification end index（G_d）were put forward to investigate the characteristics of coke-CO_2 gasification.The results showed that with the increase of inert component content the G,G_s and G_d decreased.Especially,the G,G_s and G_（d ）dropped rapidly in the 40%inert component content.The activation energies of coke gasification reaction derived from the Ozawa integration method indicated that the activation energy of the coke with the 40%inert component content had the relatively large value when the inert component content was in the range of 20%—60%.Also,XRD and SEM analyses showed that the coke with the 40%inert component content had the dense homogeneous matrix,high-aromatic degree and low-lattice imperfection.Therefore,the limit of inert component to the vitrinite of Fushun gas coal was 40%.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2018年第3期976-983,共8页
Chemical Industry and Engineering Progress
基金
国家自然科学基金(U1361212)
华北理工大学研究生创新项目(2017S08)
关键词
镜质组
气化反应
活化能
微晶结构
容惰能力
vitrinite
coke gasification
activation energy
microcrystalline structure
inert-tolerant capacity
