正戊烷异构化Ni-Mo-HM催化剂的研究

探讨了催化剂载体酸性质对正戊烷异构化的影响。考察了离子交换和竞争吸附剂对催化剂性能的影响。试验结果表明：Ｎｉ－ Ｍｏ － ＨＭ 双非贵金属催化剂的异构化活性随着丝光沸石残钠量的降低而提高，残钠的质量分数为１－３５ ％ 时，催化剂性能最好；铵交换可以改变丝光沸石分子筛的表面酸性质使酸度达到最佳分布，有利于提高异构化的活性；引入竞争吸附剂后Ｎｉ－ Ｍｏ － ＨＭ 催化剂中金属活性组份分布均匀，催化活性提高，在工艺条件相同的情况下，正戊烷的转化率提高５－６ ％ ～１０－３ ％ ，异戊烷收率提高５－７ ％ ～９－４ ％ 。

Ni-Mo-HM Catalysts for Pentane Isomerization

Effects of acid properties of H-mordenite supported Ni-Mo on isomerization of n-pentane were invest igated. Effects of ion-exchange and competitive adsorption of catalyst on catalytic properties were studied as well.Experimental results show that the isomerization activity of Ni-Mo-HM catalyst increases when the residual sodium contents of the catalyst decreases,and the optimum distribution of surface acid of the catalyst can also be obtained,resulting in the enhancement of isomerization activity of the catalyst.The isomerization activity and selectivity of Ni-HM catalyst increase on addition of competitive adsorbent catalyst.Results from runs over HM 3302 catalyst show that under the same reaction conditions,n-pentane conversion and iso-pentane yield increase by a factor of 5 6%～10 3 % and 5 7%～9 4% respectively.