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Chemcial Industry and Engineering 2016, Vol. 33 Issue (5) :38-44,95    DOI: 10.13353/j.issn.1004.9533.20141143
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Deactivation and Regeneration Behaviors of MoO3-NiO/γ-Al2O3 for the Synthesis of Pyridine from Tetrahydrofurfuryl Alcohol
Li Yulong1,2, Lu Penghao1, Zhang Lei1, Fang Shuo3, Meng Shuxian1,2, Feng Yaqing1,2, Qi Shibo4
1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
2. Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China;
3. Tianjin Lisheng Pharmaceutical Co. Ltd, Tianjin 300111, China;
4. School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China

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Abstract 

The fresh and regenerated catalysts MoO3-NiO/γ-Al2O3 were applied for the conversion of biomass tetrahydrofurfuryl alcohol(THFA) into pyridine(PY). The differences of catalytic performances between the fresh and regenerated catalysts and the reason of the deactivation behaviors of the catalysts were investigated by nitrogen adsorption, elemental analysis(EA), scanning electron microscope(SEM), transmission electron microscope(TEM), X-ray diffraction analyzer (XRD), Laser Raman spectroscopy (LRS), X-ray photoelectron spectrometer(XPS), thermogravimetric analyzer (TG) and Fourier transformed infrared spectroscopy of chemisorbed pyridine(PY-IR). Characterization of deactivated catalysts identified two types of carbonaceous species deposited on the catalysts, the amorphous carbon and the graphitic carbon. The reason of catalyst deactivation was not caused by the change or loss of active components, but by the carbon deposition. The pores and surfaces of the deactivation catalysts were blocked by carbon deposition, which resulted in the decline of effective utilization rate of active components and acidic sites. For the catalyst deactivation, online burning method was employed for the regeneration of deactivation catalyst in the air. The activity of the regenerated catalysts could be restored mostly and remained stable in the first 50 h with pyridine yield more than 80% compared with the fresh catalysts.

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Articles by authors
Li Yulong
Lu Penghao
Zhang Lei
Fang Shuo
Meng Shuxian
Feng Yaqing
Qi Shibo
Keywordscoking;   deactivation;   regeneration;   pyridine;   tetrahydrofurfuryl alcohol;   MoO3-NiO/γ-Al2O3     
Received 2014-09-19;
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Li Yulong, Lu Penghao, Zhang Lei, Fang Shuo, Meng Shuxian, Feng Yaqing, Qi Shibo.Deactivation and Regeneration Behaviors of MoO3-NiO/γ-Al2O3 for the Synthesis of Pyridine from Tetrahydrofurfuryl Alcohol[J]  Chemcial Industry and Engineering, 2016,V33(5): 38-44,95
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