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利用X-射线衍射法和付里叶红外光谱法对实验室制备的新鲜硫化态催化剂和不同工况使用不同时间的Co-Mo系耐硫变换催化剂的载体γ-Al_2O_3的硫酸盐化反应进行了分析。实验结果表明,Co-Mo系催化剂从氧化态硫化后变成硫化态,载体γ-Al_2O_3就产生硫酸盐化反应,生成碱式硫酸铝。该反应对催化剂活性有间接影响。在工业化生产中变串低变流程中,在汽气比为0.2～0.25、低变反应温度<250℃、氧含量<50ppm的条件下,硫酸盐化反应不明显;在全低温变换流程中该反应较为明显。这说明,通过降低汽气比、反应温度和氮含量可控制γ-Al_2O_3硫酸盐化反应。
X-ray diffraction and Fourier transform infrared spectroscopy were used to study the sulfation reaction of fresh sulfided catalyst prepared by laboratory and γ-Al 2 O 3 supported carrier of Co-Mo sulfur-tolerant shift catalyst with different time and different working conditions analysis. The experimental results show that the Co-Mo catalyst changes from the oxidized state to the sulfided state, and the carrier γ-Al_2O_3 produces the sulfation reaction to form basic aluminum sulfate. This reaction has an indirect effect on the catalyst activity. In the process of industrialized production, when the gas-to-gas ratio is 0.2-0.25, the temperature is lower than 250 ℃ and the oxygen content is less than 50ppm, the sulfation reaction is not obvious. In the whole low-temperature shift process The reaction is more obvious. This shows that the γ-Al 2 O 3 sulfation reaction can be controlled by reducing the gas-gas ratio, the reaction temperature and the nitrogen content.