碳热还原硫酸钡反应热力学及动力学研究
发布时间:2018-05-22 13:47
本文选题:碳热还原 + 硫酸钡 ; 参考:《化工矿物与加工》2017年05期
【摘要】:对碳热还原硫酸钡反应过程进行了热力学分析和动力学研究,结果表明:碳热还原硫酸钡反应在高温阶段主要由碳气化产生的CO与硫酸钡粒子发生反应,升高温度有利于提高反应速度、缩短反应时间;在物料配比(以质量计)为硫酸钡∶无烟煤=4∶1,硫酸钡粒度过200目,无烟煤过80目,反应温度为850~1 000℃时,还原反应过程的限制性环节是界面化学反应,表观活化能为183.69kJ/mol,动力学方程可由Erofeev方程ln[-ln(1-x)]=nlnt+lnk表示。
[Abstract]:The thermodynamic analysis and kinetic study on the process of carbothermal reduction of barium sulfate have been carried out. The results show that the CO produced by carbothermal reduction of barium sulfate mainly reacts with barium sulfate particles at high temperature. When the mass ratio of barium sulfate to anthracite is 4: 1, the particle size of barium sulfate is more than 200 mesh, the size of anthracite is over 80 mesh, and the reaction temperature is 850 鈩,
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