部分脱灰及碱金属对煤直接液化渣热化学过程的影响  

Effects of Partial Demineralization and Alkali Metals on Thermochemical Process of Direct Coal Liquefaction Residue

作　　者：郑志磊 王云飞 鞠丽颖 侯丽华 庞颖哲 杨晓亭 Zheng Zhilei;Wang Yunfei;Ju Liying;Hou Lihua;Pang Yingzhe;Yang Xiaoting(Ordos Institute of Technology,Ordos 017000,China)

机构地区：[1]鄂尔多斯应用技术学院,内蒙古鄂尔多斯017000

出　　处：《广东化工》2024年第16期13-16,共4页Guangdong Chemical Industry

基　　金：内蒙古自治区自然科学基金项目(2022MS02004);内蒙古自治区高等学校科学研究项目(NJZY21150);2021年度鄂尔多斯市产业创新创业人才团队-煤基固废直接液化残渣气化制氢创新人才团队;2023年度鄂尔多斯市博士、博士后科研资助项目;鄂尔多斯市2019年度科技计划项目应用技术研究与开发(2019501);鄂尔多斯应用技术学院校级科研项目(KYYB2022004)。

摘　　要：以煤直接液化渣为原料,利用热重分析仪,考察了部分脱灰和碱金属对其在水蒸气气氛下热化学过程的影响,并计算了气化阶段的表观活化能。结果表明:部分脱灰提高了煤直接液化渣在热解和气化阶段的转化率,降低了半焦的表观活化能,对热化学过程产生积极的影响;NaCl在热解和气化过程中均未表现出明显的催化作用;KCl在热解过程中同样没有表现出明显的催化作用,在气化阶段,则提高了半焦在低温下的气化转化率,表现出了催化作用,并使半焦的气化反应进入到了内扩散过渡区。The effects of partial demineralization and alkali metals on the thermochemical process of direct coal liquefaction residue in steam atmosphere were investigated by thermogravimetric analyzer,and the apparent activation energy of gasification was calculated.The results show that partial demineralization increases the conversion rate of direct coal residue in the course of pyrolysis and gasification,reduces the apparent activation energy of coke,and has a positive effect on the thermochemical process.NaCl shows no obvious catalytic effect during pyrolysis and gasification.KCl also show no obvious catalytic effect in the pyrolysis process,but in the gasification stage,it improves the gasification conversion rate of coke at low temperature,shows catalytic effect on the gasification,and makes the gasification reaction of coke switches to the internal diffusion transition zone.

关 键 词：煤直接液化渣 部分脱灰 碱金属 热化学过程 动力学 

分 类 号：TQ031.3[化学工程]