Polyoxymethylene dimethyl ethers (PODE_n) are promising diesel blend components with high oxygen content, high cetane number and similar properties to diesel. In this paper, we conducted a series of experiments for synthesizing PODE_n over a HZSM-5 catalyst in a batch stirred autoclave using methylal and trioxane as reactants. Our research focused on the water influence on these syntheses by contrasting the differences from experiments with or without water and built reaction pathway and rate laws. The experimental and kinetic results showed that decrease of water amount could not only increase yields of the PODE_n but also reduce the influences on formation rates of the desired products and eliminate some side reactions. Therefore, it is necessary to optimize water amount in the raw materials for balancing costs of the feed and operation as well as yields of the products to maximize the economy in a commercial production of PODE_n.

聚甲醛二甲醚 (PODE _n ) 是具有高氧含量、高十六烷值和与柴油相似的特性的有前途的柴油混合组分。在本文中，我们进行了一系列实验，在 HZSM-5 催化剂上使用甲缩醛和三恶烷作为反应物在间歇搅拌高压釜中合成 PODE _n。我们的研究重点是通过对比有水或无水实验的差异并建立反应途径和速率规律，水对这些合成的影响。实验和动力学结果表明，减少水量不仅可以提高 PODE _{n 的}产率同时也减少了对目标产物生成速率的影响，消除了一些副反应。因此，有必要优化原料中的水量，以平衡进料和操作的成本以及产品的收率，以最大限度地提高 PODE _n商业生产的经济性。