Oligomeric oxymethylene ethers (OMEs) are promising fuels for internal combustion engines with self-ignition. A tremendous reduction of soot, nitrogen oxide and hydrocarbon emissions can be realized by employing OMEs. This work describes the synthesis of OMEs from dimethyl ether (DME) and trioxane. Zeolite H-BEA 25 was found to be a suitable catalyst for this reaction and a study on reaction parameters (e.g. temperature, reactant feed ratio and reaction time) has been carried out. A maximum DME conversion of 13.9 wt% could be obtained and the maximum reactant-related product yield for OME_3–5 was 8.2 wt%. An OME formation mechanism is proposed which explains the observed product spectrum.

低聚甲醛醚（OMEs）是具有自燃功能的内燃机的有前途的燃料。通过使用OME，可以大大减少烟尘，氮氧化物和碳氢化合物的排放。这项工作描述了由二甲醚（DME）和三恶烷合成OMEs。发现沸石H-BEA 25是该反应的合适催化剂，并且已经对反应参数（例如温度，反应物进料比和反应时间）进行了研究。可以达到13.9 wt％的最大DME转化率，OME _3–5的最大与反应物相关的产物产率为8.2 wt％。提出了一种OME形成机理，该机理解释了观察到的产物谱。