甲醇在加压条件下脱水生成二甲醚的动力学研究  

Study on the kinetics of methanol dehydration to dimethyl ether under high pressure

作　　者：吴萍[1] 程程远[1] 张海涛[1] 应卫勇[1] 房鼎业[1] 

机构地区：[1]华东理工大学大型工业反应器工程教育部工程研究中心,上海200237

出　　处：《计算机与应用化学》2008年第10期1207-1210,共4页Computers and Applied Chemistry

基　　金：国家科技支撑计划课题(2006BAE02B02)

摘　　要：在压力3.0 MPa～5.0 MPa、反应温度260℃～380℃、液空速(2.5～8.0)ml/(g·h)条件下,在等温积分反应器内,采用0.154 mm～0.198 mm的CM-3催化剂,考察操作条件对甲醇转化率的影响,测定甲醇气相脱水生成二甲醚的反应动力学实验数据。实验结果表明,随着压力的增加,甲醇转化率下降;加压条件下,温度提高甲醇转化率提高,在380℃左右接近平衡;甲醇转化率随着空速的增加而降低。以Langmiur均匀吸附双曲型动力学方程式建立以各组分逸度表示的本征动力学模型,根据实验数据用参数估值方法获得动力学模型中的参数。残差分析和统计检验表明,动力学模型是适宜的。Intrinsic kinetics of methanol dehydration to dimethy] ether on CNM-3 catalyst was studied in an isothermal integral reactor. The reaction was conducted under high pressure. The temperature range was 260℃- 380℃. The space velocity of liquid methanol was 2. 5 ml - 8.0 ml/（ g· h）. The influence to methanol conversion by operational condition was studied. With the increase of reaction pressure, methanol conversion dropped slowly. In the pressurized conditions, the methanol conversion improved with the higher temperature ; decreased with the improvement of space velocity. A Langmuir even absorption hyperbolical kinetic equation was obtained. The parameters were estimated by the parameter estimation method based on the experimental data. Residual error distribution and statistic test showed that the intrinsic kinetic models are liable and acceptable.

关 键 词：甲醇 二甲醚 加压条件 本征动力学 

分 类 号：TQ223.2[化学工程—有机化工]