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通过等体积浸渍法,实验制备Pt-Ru/γ-Al2O3催化剂,对该催化剂进行活性、稳定性测试,并进行TG与TEM表征,然后建立二维固定床数值模型分析反应器内的温度场、流场与组分场分布。实验结果表明:该催化剂具有良好的催化效率及优越的稳定性,CH4在800℃时的转化率为94.1%,CO/H2比为1.03,在800℃下能连续运行500 h。模拟结果表明,建立的数值模型与实验值吻合较好,不同温度下的最大偏差不超过14.81%,能较好地反应固定床反应器内的热质传递与组分分布特性。
The Pt-Ru / γ-Al2O3 catalyst was prepared by the same volume impregnation method. The catalyst was tested for its activity and stability, and characterized by TG and TEM. Then, a two-dimensional fixed bed numerical model was established to analyze the temperature field in the reactor. Flow field and component field distribution. The experimental results show that the catalyst has good catalytic efficiency and excellent stability. The conversion of CH4 at 800 ℃ is 94.1%, the CO / H2 ratio is 1.03, and the continuous operation at 800 ℃ for 500 h. The simulation results show that the established numerical model is in good agreement with the experimental value, and the maximum deviation at different temperatures does not exceed 14.81%, which can well reflect the heat and mass transfer and the component distribution in a fixed-bed reactor.