新型低温合成甲醇反应器系统的设计与研究

DESIGN AND STUDY OF A NOVEL INTEGRATED TWO-STAGE REACTOR SYSTEM FOR METHANOL SYNTHESIS

设计和建立了一种新型的两段一体化反应器系统,并对其中的低温两步合成甲醇过程进行了研究。结果表明,该反应器系统可以在较宽的操作范围实现连续稳定运行。与浆态床单反应器两步合成甲醇相比,该反应器具有两步反应可以同时在最佳温度下进行,催化剂与产物自然分离,氢解催化剂中毒减缓,氢解速率较高及反应器液位自动补偿等优点。在本实验研究条件下,羰基化阶段为整个过程的控制步骤。相同压力下,在两段一体化反应器中得到了比浆态床反应器中高的甲醇时空收率。两段一体化反应器系统在温和条件下可得到与目前工业合成甲醇CO单程转化率相近的转化率。温度、压力及空速对反应具有重要影响。

A novel integrated two-stage reactor (ITSR) system was designed and low temperature methanol synthesis in the system was studied The results show that the ITSR system can be operated successfully at a broad range of conditions The characteristics of the ITSR system superior to that of single-slurry reactor are optimum temperatures for both stage, natural separation of products from catalyst, inhibition of hydrogenolysis catalyst deactivation, high hydrogenolysis rate and steady state liquid level control Under the conditions used in the study, carbonylation stage is the rate limiting step for the two-stage synthesis Space time yield of methanol in the ITSR is greater than that in the slurry reactor at the same pressure For CO conversions similar to that of the current industrial practice, the ITSR can be operated at much milder conditions Temperature, pressure and space velocity shows significant influence on the synthesis reaction