甲醇合成催化剂的工艺参数优化及反应机理探讨

对自主研制的甲醇合成催化剂进行工艺参数优化,同时根据实验结果对合成气条件下甲醇合成的反应机理进行探讨。实验采用16通道反应器,考察反应温度和接触时间对合成甲醇反应速率的影响,确定适宜的催化剂工艺条件。结果表明,在较长接触时间下,随着温度的升高,CO转化率、H_2转化率和甲醇相对含量先升高后降低,CO_2转化率降低。在较低温度下,CO_2转化率随接触时间延长基本不变,表明甲醇中碳元素主要来自于CO,而CO_2浓度处于水汽变换反应与加氢形成甲醇反应之间的平衡状态。

Process parameter optimization and reaction mechanism investigation of a methanol-synthesis catalyst

The process parameters of a self-designed methanol-synthesis catalyst were optimized and reaction mechanisms involved were investigated.The effect of reaction temperature and contact time on reaction rate was studied in reactor with 16 channels,and the suitable process conditions were obtained.Results showed that with high contact time,conversions of CO and H₂,and relative content of CH₃OH increased and then decreased when reaction temperature increased,while CO₂ conversion decreased gradually.Under low temperature,CO₂ conversion was basically unchanged with the increase of contact time,which indicated that carbon in CH₃OH was generally from CO,while CO₂ concentration was in equilibrium formed by water-gas shift reaction and CO₂ hydrogenation to methanol.