Experimental Study of Syngas Production via Dry Reforming of Methane using Fluidized-bed Reactors

• Main Authors: Hsuan-Ru Lai, 賴宣儒
• Other Authors: Rei-Yu Chein
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/cgi-bin/gs32/gsweb.cgi/login?o=dnclcdr&s=id=%22107NCHU5311018%22.&searchmode=basic

碩士 === 國立中興大學 === 機械工程學系所 === 107 === In this study, fluidized-bed reactor was used to investigate the characteristics of syngas production via dry reforming of methane (DRM) using 10wt%Ni-10wt%CeO2/Al2O3 as catalyst experimentally. The effects of reactor type, reactant species composition, reactant flow rate, catalyst pellet size, and reaction temperature on DRM performance and catalyst stability were studied in detail through parametric study. The reactant species composition was divided into nitrogen-rich (laboratory grade) and nitrogen-lean (simulated biogas). For both species compositions, it was found that methane conversion can be enhanced by increasing carbon dioxide amount. With the same carbon dioxide to methane ratio, it was found that higher conversions of methane and carbon dioxide can be obtained when nitrogen amount was higher. With increased reactant flow rate that resulting in higher fluidization degree, lower conversions of methane and carbon dioxide were obtained due to shortened contact time between gas and catalyst pellets. Because of endothermic reaction, higher conversions of methane and carbon dioxide can be resulted when reaction temperature was increased. The effect of catalyst pellet size on DRM performance was insignificant as reaction temperature was high. The catalyst thermal stability test indicated that the methane conversion maintained at a certain level within 48 hour as for both fluidized-be-bed and fixed-bed reactors under the reaction temperature of 800 °C.