Materials Reports 2022, Vol. 36 Issue (Z1): 22020089-6 |
INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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Study on Structure and Catalytic Efficiency of Laser-selective Melting Methane Steam Catalytic Reformer |
WANG Wenxuan1,2, LIU Min2, QIU Keqiang1, DONG Dongdong2, LIU Taikai2, LI Yanhui2, YAN Xingchen2
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1 College of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110000, China 2 Institute of New Materials, Guangdong Academy of Sciences, National Engineering Laboratory for Modern Materials Surface Engineering Technology, Guangzhou 510630, China |
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Abstract Hydrogen is a representative of the new generation of clean energy. Methane reforming is an important technology to obtain hydrogen. Laser selective melting technology can realize integration of structure and function of the reforming unit and simplify preparation process. In this work, cellular model for catalytic reforming unit with minimal surface structure was obtained by computer aided design software to carry on the design and modeling; catalytic reforming unit with different thickness and aperture was prepared by laser selective melting technology; the morphology and phase composition of reformer before and after catalyst loading were studied. Combined with the research on the mechanism of methane steam catalytic reforming, the influence of reforming wall thickness, pore size, specific surface area and catalytic temperature on hydrogen conversion and mechanism were obtained. The results show that the wall thickness of the reformer has no significant effect on hydrogen conversion efficiency; the increase of reaction temperature can improve the hydrogen conversion, with the highest conversion at 900 ℃; at the same time, when the pore size is too small, the conversion rate of hydrogen decreases due to the carbon deposition in the reaction process and the rapid flow rate. The conversion rate can be increased by increasing the pore diameter appropriately. Under the condition of such an appropriate pore size, the conversion rate of hydrogen increases with the increase of the specific surface area of the reformer.
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Published: 05 June 2022
Online: 2022-06-08
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Fund:Key R & D Program of Guangdong Province (2020B090923002), Guangdong Special Support Program (2019BT02C629), National Key R & D Program of China(2018YFB1502603), Guangdong Academy of Sciences Project to Build a First-class Scientific Research Institution in China(2019GDASYL-0102007), and Guangzhou Industry-University-Research Association Innovation Major Project “Surface Treatment and Maintenance of Key Gas Turbine Parts”. |
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