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| Effect of calcination temperature on structure and adsorption desulfurization performance of supported NiO/ZnO-TiO2 adsorbent |
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ZHOU Guanglin1,2, LIU Fei3, LI Qin1, CHEN Sheng1, JIANG Weili1,2, GONG Xuecheng1
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(1.College of New Energy and Materials in China University of Petroleum(Beijing), Beijing 102249, China;2.Beijing Key Laboratory of Biogas High Value Utilization, Beijing 102249, China;3.China National Petroleum Corporation Lanzhou Chemical Research Center, Lanzhou 730060, China)
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| Abstract: |
| An equal volume impregnation method was used to prepare NiO/ZnO-TiO2 gasoline desulfurization adsorbents, and the adsorbent precursors were calcined at different temperatures to obtain adsorbents. The effects of different calcination temperatures on the desulfurization activity of NiO/ZnO-TiO2 adsorbents were investigated. The adsorbents were characterized by X-ray diffraction (XRD), H2-temperature-programmed desorption(H2-TPD) and H2-temperature-programmed reduction (H2-TPR). The results show that the interaction between NiO and the support enhances with the increase of calcination temperature, and the size of active component NiO improves. However, the existence of TiO2 inhibits the migration and sintering of NiO to some extent. Too high or too low calcination temperature is not favorable for the formation of the adsorbent pores, which reduces the specific surface area and is not conducive to the desulfurization process. When the calcination temperature is 500 ℃, the adsorbent has a maximum specific surface area of 31.02 m2·g-1, and the desulfurization activity is the best. The breakthrough time and the breakthrough sulfur capacity are 152 h and 11.21%, respectively. |
| Key words: FCC light gasoline desulfurization adsorbent Ni/ZnO-TiO2 calcination temperature |
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