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| Effects of TiO2 catalyst modification methods on preparation of bio-fuel from Jatropha oil via photothermal catalysis |
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| DOI： |
| KeyWord:solid dispersion method sol-gel method catalyst modification photothermal catalysis bio-fuel Jatropha oil |
| FundProject: |
| Author Name | Affiliation | | YANG Yijie1,2, LIU Ying1, ZHANG Wei1, LIU Na1, GUI Chao1, CAI Zhengda3, SUN Lumin2, CHEN Yubao1 | 1.School of Energy and Environmental Science, Yunnan Normal University, Kunming 650500, China
2. School of Environmental Science and Engineering, Tan Kah Kee College, Xiamen University, Zhangzhou 363105, Fujian, China
3.Yunnan Provincial Academy of Science and Technology, Kunming 650228, China |
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| Abstract: |
| To improve the problems of low catalytic efficiency and difficult recovery of TiO2 in the photothermal catalysis process, the Pt/TiO2-HZSM-5 catalysts were prepared by combining TiO2 with HZSM-5 molecular sieve using solid dispersion method and sol-gel method, respectively, and loaded with active metal Pt.The two catalysts were characterized by X-ray diffraction (XRD), N2 adsorption-desorption, high-resolution transmission electron microscopy (HRTEM), ultraviolet-visible light(UV-Vis), X-ray fluorescence (XRF) and pyridine-infrared (Py-IR), and used in the photothermal catalytic hydrogenation of Jatropha oil for the preparation of bio-fuel to investigate the catalytic effects of the two modified catalysts.The results showed that TiO2 was successfully dispersed on the surface of the HZSM-5 molecular sieve，the specific surface area of TiO2 increased, and the pore volume and pore size of the HZSM-5 molecular sieve changed.The modified catalyst showed a significant red shift in the diffraction peak with improved absorption of visible light, and the acidic sites increased.Compared with sol-gel method,Pt/TiO2-HZSM-5 prepared by solid dispersion method had better Pt dispersion and no agglomeration phenomenon, smaller particle size and better catalytic performance. With this catalyst, the material conversion and C8-C17 alkanes selectivity reaching 93.20%and 54.92%respectively in the photothermal catalytic hydrogenation of Jatropha oil for the preparation of bio-fuel under the conditions of reaction temperature 100℃,H2 pressure 0.4 MPa and reaction time 12 h. The results of the reuse experiments of this catalyst showed that the C8-C17 alkanes selectivity decreased with the increase of regeneration times, and the regeneration capacity should be strengthened. |
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