MgO脱除HCN的动力学研究

研究了MgO在不同温度下对HCN的脱除作用,并用XRD对反应后固相产物进行分析。研究了温度、MgO质量分数、HCN初始体积分数和停留时间等因素对HCN脱除效率的影响,并求出MgO与HCN反应的动力学参数。结果表明,673 K时,MgO已经开始与HCN发生反应,当温度高于873 K时,HCN中气态"N"已转化到固相产物MgCN₂中;HCN脱除效率随温度、MgO质量分数和停留时间的增加呈线性增加,但随HCN初始体积分数增加呈负幂函数的规律下降;MgO与HCN的反应级数α为0.72,表观活化能E为32.2 kJ/mol。

Dynamic investigations on the removal of hydrogen cyanide using magnesium oxide

The removal of hydrogen cyanide(HCN) using magnesium oxide(MgO)at various temperatures was investigated in the presented paper. The solid products were analysed by X-Ray Diffraction. The effects of temperature, mass fraction of MgO, initial volume fraction of HCN and residence time were discussed. The kinetic parameters of the reaction between HCN and MgO were obtained. Results show that MgO remarkably reacts with HCN through transforming the nitrogen in HCN into the solid product MgCN₂ from 873 K. The removal efficiency of HCN increases with the increase of temperature, mass fraction of MgO and residual time in linear relation; but decreases with the initial volume fraction of HCN in negative power function relationship. The reaction order and apparent activation energy of the reaction between HCN and MgO are 0.72 and 32.2 kJ/mol respectively.