Acidic γ-Al₂O₃ is an active catalyst for the dehydration of methanol to dimethyl ether (DME). However, the produced steam reduces the activity. In this work, the influence of the exposure of γ-Al₂O₃ to steam on the catalytic activity for methanol dehydration has been determined. At 250 °C and increasing stream partial pressure the conversion of γ-Al₂O₃ into γ-AlO(OH) is observed at a p(H₂O) of 13–14 bar. As a consequence, the catalytic activity decreases, reducing the rate of methanol dehydration to around 25%. However, this conversion is reversible and under reaction conditions γ-AlO(OH) converts back to γ-Al₂O₃, recovering its catalytic activity.

酸性的γ-Al ₂ ö ₃是用于甲醇脱水为二甲醚（DME）的活性催化剂。但是，产生的蒸汽降低了活性。在这项工作中，γ-Al系的曝光的影响₂ Ò ₃对用于甲醇脱水催化剂的活性蒸汽已被确定。在250℃下和增加流分压的γ-Al的转化₂ ö ₃成γ-的AlO（OH）在AP（H观察到₂ O）的13-14巴。结果，催化活性降低，甲醇脱水率降低到约25％。但是，这种转换是可逆的，并且在反应条件γ-的AlO（OH）转换回的γ-Al ₂ ö ₃，恢复其催化活性。