物理化学学报 >> 2000, Vol. 16 >> Issue (06): 501-506.doi: 10.3866/PKU.WHXB20000605

研究论文 上一篇    下一篇

海泡石对非晶态NiB合金催化剂的改性研究

石秋杰, 陈昭萍, 罗来涛, 李凤仪, 王祥生   

  1. 南昌大学北区应用化学研究所，南昌 330047|大连理工大学碳资源综合利用开放实验室，大连 116012
  • 收稿日期:1999-09-13 修回日期:2000-01-04 发布日期:2000-06-15
  • 通讯作者: 石秋杰

Studies on the Modification of Sepiolite for Amorphous NiB Alloy Catalyst

Shi Qiu-Jie, Chen Zhao-Ping, Luo Lai-Tao, Li Feng-Yi, Wang Xiang-Sheng   

  1. Institute of Modern Applied Chemistry,Nanchang University,Nanchang 330047|Open Laboratory of Comprehensive Utilization for Carbon Resources,Dalian 116012
  • Received:1999-09-13 Revised:2000-01-04 Published:2000-06-15
  • Contact: Shi Qiu-Jie

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摘要：

以常压气相苯加氢为探针反应,首次考察了酸改性前后海泡石的加入对非晶态NiB合金催化剂的加氢及抗硫性能的影响;用TPR、TPD表征了催化剂的表面性质,测定了酸改性前后海泡石的比表面及孔径分布,并与活性进行了关联. 结果表明,加入海泡石显著地提高了非晶态NiB合金的催化活性和抗硫性;提高的幅度随制备方法的不同而异.其原因为NiB与海泡石之间存在相互作用,改变了NiB合金的还原性能和吸附性能. 酸改性后脱镁率在10%～36%范围内的海泡石的改性效果均比未改性的海泡石的效果好,这主要是因为随改性深度的增加,微孔逐渐向中孔扩展,更有利于苯加氢反应的进行.

关键词: 海泡石, 非晶态NiB合金, 苯加氢, 表面性能

Abstract:

The pulse microreactor technique was used to examine the effect of addition of sepiolite on the catalytic and surface porperties of amorphous NiB alloy. Gas phase hydrogenation of benzene was chosen as the probe reaction. The surface properties of the alloys were characterized by TPR and TPD. The specific surface area and distribution of pore diameter were determined, and were correlated with the activity of the samples. Results indicated that the addition of sepiolite increased the activity and sulfur resistance of amorphous NiB alloy. Comparing two kinds of preparation methods, it can be seen that impregnation was superior to mechanically mixing. The probable reason is that there is interaction between sepiolite and NiB alloy, which changes the reduction and absorption charaters. The activities of the samples containing sepiolite treated with acid are higher than that of the untreated sample because acid treatment alters the distribution of the pore diameter in sepiolite.

Key words: Sepiolite, Amorphous NiB alloy, Benzene hydrogenation, Surface character