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1 引言 耐硫甲烷化催化剂具有耐硫、抗析炭等特点,可简化甲烷化工艺流程,便于工厂操作。设计合理的工业反应器和延长催化剂使用寿命是目前工业化急需解决的问题。作者对SDM-1型耐硫甲烷化催化剂宏观动力学进行了研究。 2 实验 2.1 测试装置 实验流程见图1。反应器为增压内循环无梯度反应器,将直径27mm、高25mm的催化剂筐置于导流环中,筐下方装有调速叶轮,转速1200～7200r/min。用热电偶测量反应床温度。实验用原料气由钢瓶中配制,配制后倒置48h以上,使气体充分混合。原料气经净化器脱除有害杂质后,由质量流量计计量,进入预热器升温至300℃,送反应器,出口气体经分离器至皂膜流量计计量,然后放空,或送HP5890色谱仪分析。 动力学测试前通过空白试验证实实验装置无催化活性。当转速为2850r/min,实验范围内消除了外扩散影响。H_2S体积浓度控制在0.09％
1 Introduction Sulfur-resistant methanation catalyst with sulfur-tolerant, anti-charcoal and other characteristics, can simplify the methanation process, easy factory operation. The rational design of industrial reactors and prolonged service life of the catalyst is the urgent problem to be solved in industrialization. The authors studied the macro-kinetics of SDM-1 sulfur-tolerant methanation catalysts. 2 Experimental 2.1 Test Device Experimental process shown in Figure 1. The reactor is a pressurization internal circulation non-gradient reactor, a catalyst basket with a diameter of 27mm and a height of 25mm is placed in a diversion ring, and a speed regulating impeller is arranged under the basket with a rotating speed of 1200 to 7200r / min. The temperature of the reaction bed was measured with a thermocouple. The experimental raw material gas is prepared from the cylinder and is inverted for more than 48h after preparation so that the gas is well mixed. After the raw material gas is removed by the purifier to remove harmful impurities, it is metered by a mass flow meter and enters a preheater to raise the temperature to 300 DEG C. and sends it to the reactor. The outlet gas is measured by a separator to a soap membrane flow meter, then emptied or sent to a HP5890 chromatograph analysis. Kinetic test before the blank test confirmed that the experimental device without catalytic activity. When the speed of 2850r / min, the experimental range to eliminate the impact of external diffusion. H_2S volume concentration controlled at 0.09%