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Citation: WANG Yin-Ye, MA Zhi, LIU Jian-Ming, QIN Yong-Ning. TPD of Pyridine, CO and SO₂ on Nanocrystals of Al₂O₃/SiO₂ Mixed Oxides[J]. Chinese Journal of Applied Chemistry, ;2000, 17(4): 459-461. shu

TPD of Pyridine, CO and SO₂ on Nanocrystals of Al₂O₃/SiO₂ Mixed Oxides

1.
College of Chemical Engineering, Tianjin University, Tianjin 300072

Received Date: 29 December 1999
Available Online: 30 May 2000

Pyridine, CO and SO₂ were used as probes to characterize the mixed oxides Al₂O₃/SiO₂ by TPD technique. XRD study showed mullite was the major composition of the mixed oxides. The tail gases were analyzed by gas chromatography. The results showed that the nanocrystal mixed oxides exhibited a good adsorbability for pyridine, CO and SO₂. During desorption of pyridine and CO, CO₂ was detected in desorbed mixtures and in the case of SO₂ solid sulphur was found.
- Al₂O₃/SiO₂ mixed oxide,
- nanocrystal,
- pyridine,
- CO,
- SO₂,
- temperature programmed desorption
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TPD of Pyridine, CO and SO₂ on Nanocrystals of Al₂O₃/SiO₂ Mixed Oxides