物理化学学报 >> 1996, Vol. 12 >> Issue (04): 341-345.doi: 10.3866/PKU.WHXB19960411

研究论文 上一篇    下一篇

MoO3/TiO2-Al2O3对H2S吸附的XPS研究

罗胜成,桂琳琳,唐有祺   

  1. 北京大学物理化学研究所,北京 100871
  • 收稿日期:1995-06-01 修回日期:1995-12-29 发布日期:1996-04-15
  • 通讯作者: 桂琳琳

The Characterisation of the Adsorption of H2S on MoO3/TiO2-Al2O3 by XPS

Luo Sheng-Cheng,Gui Lin-Lin,Tang You-Qi   

  1. Institute of Physical Chemistry,Peking University,Beijing 100871
  • Received:1995-06-01 Revised:1995-12-29 Published:1996-04-15
  • Contact: Gui Lin-Lin

摘要:

应用XPS对MoO3/TiO2-Al2O3体系的MoO3在TiO2-Al2O3载体上的存在状态及其对H2S的吸附和脱附性能进行了表征,结果表明:MoO3在TiO2-Al2O3表面存在分散状态的不同,这导致了对H2S吸附性能的不同.在相同的条件下,吸附剂为0.15gMoO3/gTiO2Al2O3时具有最大载流量,且随吸附温度的升高载流量也增加,达饱和时S/Mo原子比接近1,较好的氧化脱附温度为150-250℃.吸附可能是通过H2S中的S2-取代了MoO3中的O2-进行的反应吸附.

关键词: MoO3, TiO2-Al2O3, XPS, H2S, 吸附

Abstract:

The adsorption of H2S on MoO3/TiO2-Al2O3 was investigated by XPS, along with the measurement of breakthrough curve. The results showed: the amount of adsorbed H2S for each gram of MoO3 varied with the loadings of MoO3, and approached a maximum when the loading was 0.15g/g TiO2-Al2O3; the adsorption capacity of 0.15g MoO3/g TiO2-Al2O3 increased when the adsorbent was heated from 100 to 300℃, with the atomic ratio of S to Mo rising to c.a. 1, the adsorbent of 0.15g MoO3/gTiO2-Al2O3 could be regenerated easily by oxidation with air during 150 to 250℃; the adsorption process might be a chemical reaction as pointed out by reference [1]: H2S+MoO3=MoO3•SH2 or H2S+MoO3=MoO2•S+H2O.

Key words: MoO3, TiO2-Al2O3, XPS, H2S, Adsorption