失活FX-01催化剂绝热床反应器再生过程模拟

SIMULATION OF COKE BURNING REGENERATION OF COKED FX 01 CATALYST IN ADIABATIC BED REACTOR

以ＦＸ－０１催化剂烧炭再生本征动力学模型为基础，考虑粒内扩散的影响，建立工业绝热床反应器的烧炭再生模型，并应用正交配置法求解。模拟结果表明：当入口温度一定时，存在一临界空速；当入口气空速一定时，存在一临界入口温度。只有入口温度不超过临界值，且燃气空速高于临界值才能进行安全烧炭。通过对再生方案的分析，选出较优方案为：再生初期：燃气空速为９８０ｈ－１，入口温度Ｔ０＝５７３Ｋ，入口氧浓度Ｙ０Ｏ２＝２％。当烧掉床层４０％的炭时，将燃气切换为空气，同时提高入口温度到６０３Ｋ，继续烧炭。按此方案烧炭３３ｈ，可使催化剂活性基本得到恢复。

On the basis of the intrinsic kinetic model, the mathematic models on the regeneration of the coked FX 01 catalyst in adiabatic bed reactor were built up. The simulating results showed that there was a critical gas space velocity when the inlet temperature was selected, and there was also a critical inlet temperature when the gas space velocity was selected. The optimal scheme was as follows: During the initial period of regeneration, the gas space velocity was 980 h -1 , the inlet temperature was 573 K and the inlet oxygen concentration was 2%. After 40% of the original carbon was burnt up, the inlet temperature was increased to 603 K, and the gas stream was shifted to air. When 95% of the original carbon was burnt up, the regeneration was completed within 32 hours. The activity of the catalyst can be basically restored.