Owing to the high thermal resistance and greater selectivity for products of interest, zeolites are widely used both as catalysts and as catalytic supports for reactions of industrial importance. During modification of the zeolite structure, several parameters should be carefully controlled to avoid structural destruction of the zeolite. A fractional factorial design (2⁴⁻¹) was performed to evaluate the contrasts of the dealumination variables (temperature, humidity, dealumination degree and washing) in each response (Si/Al ratio, number of acid sites, catalytic conversion). Structural characterizations (XRD, textural analysis, FT-IR, XRF, ²⁷Al MAS NMR) and acidity (gas adsorption of pyridine) were performed. Catalytic tests were carried out with the ethanol dehydration reaction in a fixed-bed microreactor and pulsed flow. The dealumination degree and humidity have a statistically significant influence on the dealumination, producing higher changes to the Si/Al ratio and better ethanol conversion than the parent zeolite. The intrinsic acidity (number of acid sites) seemed to depend to a greater extent on the washing procedure and on the reaction temperature.

由于高耐热性和对感兴趣产物的更高选择性，沸石被广泛用作工业上重要反应的催化剂和催化剂载体。在改变沸石结构的过程中，应小心地控制几个参数以避免沸石的结构破坏。进行分数阶乘设计（2 ^4-1）以评估每种响应（Si / Al比，酸位点数，催化转化）中脱铝变量（温度，湿度，脱铝程度和洗涤）的对比。结构表征（XRD，纹理分析，FT-IR，XRF，²⁷进行了Al MAS NMR）和酸度（吡啶的气体吸附）。在固定床微反应器和脉冲流中对乙醇脱水反应进行了催化测试。脱铝度和湿度对脱铝具有统计学上的显着影响，与母体沸石相比，Si / Al比的变化更大，乙醇转化率更高。固有酸度（酸位点的数量）似乎在很大程度上取决于洗涤程序和反应温度。