Abstract: A phenylethylene unit's ethylbenzene dehydrogenation catalyst experienced agglomeration after long-term use. To explore the cause of the catalyst agglomeration, solubility experiments and calcination experiments were carried out, and the components of the agglomerates were analyzed using X-ray fluorescence spectroscopy. The experimental results showed that the white solid on the surface of the agglomerated catalyst was soluble in water; after calcination at 800℃ for 4 hours, the sediment still existed, and the small blocky particles were hard and not easily broken; the white solid was a potassium-containing substance. The agglomeration of the ethylbenzene dehydrogenation catalyst in this unit was caused by the migration and aggregation of potassium during the long-term use of the catalyst. This study can provide some technical reference for reducing the agglomeration of ethylbenzene dehydrogenation catalysts in production.

Key words: font-family:-apple-system, blinkmacsystemfont, ", font-size:14px, background-color:#FFFFFF, ">Phenylethylene, Ethylbenzene dehydrogenation, Catalyst agglomeration, Potassium migration, Potassium aggregation, Reaction temperature, Reactor pressure drop

摘要： 某苯乙烯装置乙苯脱氢催化剂长期使用后发生结块现象。为探索乙苯脱氢催化剂结块原因，开展了溶解性实验及焙烧实验，采用X射线荧光光谱法测试分析结块成分。实验结果表明：结块催化剂表面的白色固体溶于水；800℃下焙烧4h后沉积物仍然存在，且小的块状颗粒质地坚硬、不易破碎；该白色固体为含钾物质。该装置乙苯脱氢催化剂板结成块是催化剂在长期使用过程中钾的迁移和聚集导致的。该研究可为生产中减少乙苯脱氢催化剂结块提供一定技术参考。

关键词: font-family:-apple-system, blinkmacsystemfont, ", font-size:14px, background-color:#FFFFFF, ">苯乙烯, 乙苯脱氢, 催化剂结块, 钾迁移, 钾聚集, 反应温度, 反应器压力降