请校对一段翻译？ 润滑油 基础油 原料中的硫易使贵金属中毒，降低贵金属的加氢/脱氢功能。为了提高加氢异构 催化剂 的活性和使用寿命，本论文采用真空浸渍法，研究了贵金属含量、贵金属前驱体以及双金属对加氢异构催化剂的影响，研究结果表明，以Pt(NH3)4Cl2为Pt前驱体制备的Pt/ZSM-22/ZSM-23催化剂，随着贵金属Pt含量的增加，加氢异构反应的转化率大幅度提高，进一步增加Pt担载量时，加氢异构反应的转化率又逐渐下降，当Pt含量为0.5%时，加氢异构反应的转化率达到最大值，异构化产物收率也最大；此外，在加氢异构催化剂中添加第二组份形成双金属催化剂可以改变催化剂的还原行为、催化活性和寿命，当添加稀土等第二组份形成双金属催化剂以后，虽然催化剂的活性和选择性变化不大，但是双金属催化剂却提高了抗硫、氮中毒，抗积碳以及稳定性等方面性能。 The noble metal is easy to be poisoned by the sulfur in the lube base oil feedstocks, and decrease the hydrogenation/dehydrogenation functions of noble metal. In order to improve the activity and life of the hydroisomerization catalyst, a vacuum impregnation method was used, and the effects on the activity of the noble metal content, precursor of noble metal and bimetallic were studied. The results indicated that, Pt/ZSM-22/ZSM-23 catalyst which the Pt (NH3) 4Cl2 was used as precursor, the convertion ratio of hydroisomerization increased with the increase of Pt content, and then decreased when the Pt content increased ulteriorly, and the convertion ratio and isomerization products reached maximum when the Pt content of 0.5%. Otherwise, when a secondary component was added to formed a bimetallic hydroisomerization catalyst,the reduce action ,activity and life can be changed, when thulium was added to form a bimetallic hydroisomerization catalyst,although the activity and selectivity changed little, but the performance of resistance to sulfur, nitrogen, carbon deposition,and the stability were enhanced.查看更多4个回答 . 1人已关注
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