Abstract The kinetic behavior for methanol dehydration of different SAPOs (-11 and -18) and HZSM-5 zeolites (with different acidity and various acidity modification treatments) has been studied under the suitable conditions for the direct synthesis of dimethyl ether (DME) from H2 + CO + CO2. SAPO-11 shows a good performance for methanol dehydration, with DME yield above 80% and negligible paraffin formation, and has been assessed as acid function of a bifunctional catalyst in the single-stage synthesis of DME (with CuO–ZnO–ZrO2 as metallic function, metallic/acid mass ratio = 1/2). The bifunctional catalyst (CZZr/S-11) shows a stable kinetic behavior with high selectivity to DME (over 80%).

中文翻译：

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SAPO-11 作为酸功能在合成气和 CO 2 直接合成二甲醚中的行为

摘要 研究了不同的 SAPO（-11 和 -18）和 HZSM-5 沸石（不同酸度和各种酸度改性处理）在直接合成二甲醚 (DME) 的合适条件下甲醇脱水的动力学行为。 H2 + CO + CO2。SAPO-11 表现出良好的甲醇脱水性能，二甲醚收率超过 80%，石蜡形成可忽略不计，并已被评估为单步合成二甲醚（以 CuO-ZnO-ZrO2 为金属）的双功能催化剂的酸功能函数，金属/酸质量比 = 1/2)。双功能催化剂 (CZZr/S-11) 表现出稳定的动力学行为，对 DME 具有高选择性（超过 80%）。