Citation: Luo Sheng-Cheng, Gui Lin-Lin, Tang You-Qi. The Characterisation of the Adsorption of H2S on MoO3/TiO2-Al2O3 by XPS[J]. Acta Physico-Chimica Sinica, 1996, 12(04): 341-345. doi: 10.3866/PKU.WHXB19960411
MoO3/TiO2-Al2O3对H2S吸附的XPS研究
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.
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关键词:
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MoO3
- / TiO2-Al2O3
- / XPS
- / H2S
- / 吸附
English
The Characterisation of the Adsorption of H2S on MoO3/TiO2-Al2O3 by XPS
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.
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Key words:
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MoO3
- / TiO2-Al2O3
- / XPS
- / H2S
- / Adsorption
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