甲醇制二甲醚用铝基催化剂的制备及其性能研究

Preparation and performance research of catalyst based on alumina for preparing dimethyl ether from methanol

研制出以氧化铝为载体的催化剂Ａ以及添加第ＩＶ副族元素的催化剂Ａ＋Ｂ，并与ＨＺＳＭ－５催化剂进行了活性对比。催化剂Ａ经１０００ｈ原粒度测试，结果表明：在反应温度３００℃，空速４．２５～４．５０ｈ－１，压力为常压的条件下，二甲醚选择性＞９９％，甲醇转化率≥８０％。

Catalyst A based on alumina and catalyst A+B which was based on alumina and mixed with elements of vice-fourth family were prepared. The performances of them were also studied. The comparison of activities of catalyst A,catalyst A+B and HZSM-5 molecular sieve catalyst was discussed. The results showed that under the conditions of temperature 300℃, space velocity 4.25～4.5h -1 and normal pressure, using catalyst A, the selectivity of dimethyl ether was more than 99% and the conversion of methanol was more than 80%