汽油加氢催化剂积炭及再生研究

石油炼制与化工 ›› 2025, Vol. 56 ›› Issue (6): 36-41.

汽油加氢催化剂积炭及再生研究

张雅琳¹,吕忠武¹,鞠雅娜¹,吴培¹,张然¹,宋绍彤¹,谭帅²

1. 中国石油石油化工研究院
2. 中国石油辽阳石化分公司

收稿日期:2024-08-07 修回日期:2024-12-18 出版日期:2025-06-12 发布日期:2025-05-30
通讯作者: 吕忠武 E-mail:lvzhongwu@petrochina.com.cn

STUDY ON COKE DEPOSITION AND REGENERATION OF GASOLINE HYDROGENATION CATALYST

Received:2024-08-07 Revised:2024-12-18 Online:2025-06-12 Published:2025-05-30

摘要/Abstract

摘要： 以苯和乙醇为溶剂，采用索氏抽提装置对催化裂化汽油加氢脱硫工业失活剂进行预处理，采用N2吸附-脱附、碳硫分析、热重分析、程序升温氧化-质谱、扫描电镜-能量色散X射线能谱等方法对不同床层加氢脱硫失活剂进行分析表征，以确定最佳的再生条件及换剂方案。结果表明，汽油加氢脱硫催化剂失活的主要原因为砷的沉积中毒以及积炭，并且沿着物流方向，反应器中下部的催化剂积炭最为严重，反应器顶部与底部积炭量相当。换剂方案中需要将顶部砷中毒严重部分撇头处理并更换新鲜剂；失活剂再生时需要延长200 ℃以下低温焙烧时间，并最终控制再生温度在400~450 ℃之间，450 ℃时再生催化剂综合性能最优，脱硫率达92.6%，脱硫选择性达76.5%，活性恢复至新鲜剂的98%。

关键词: 加氢脱硫, 失活催化剂, 积炭, 砷中毒, 再生

Abstract: Using benzene and ethanol as solvents, Soxhlet extraction was used to pretreat the spent catalyst for FCC gasoline hydrodesulfurization. Physical adsorption analyzer, carbon and sulfur analyzer, thermogravimetric analyzer, TPO-MS, SEM-EDS were used to characterize the deactivation catalysts from different bed layers, in order to determine the best regeneration conditions and replacement plan. The results showed that the main reasons for deactivation of the catalysts were arsenic poisoning and carbon deposition, the carbon deposition was the most serious in the middle and lower of the reactor along with the direction of stream, the amount of carbon deposited on the top and bottom of the reactor is equal. It is necessary to eliminate the serious arsenic poisoning catalyst at the top and to be replaced by fresh catalyst in the replacement plan, and to prolong the calcination time at low temperature less than 200 ℃ when the spent catalyst is regenerated, and finally to control the regenerating temperature between 400 ℃ and 450 ℃. The results showed that the overall performance of the catalyst regenerated at 450 ℃ was the best, the desulfurization rate was 92.6% , the selectivity was 76.5% , and the activity was restored to 98% of the fresh catalyst.

Key words: hydrodesulfurization, deactivated catalyst, coke deposition, arsenic poison, regeneration

张雅琳吕忠武鞠雅娜吴培张然宋绍彤谭帅. 汽油加氢催化剂积炭及再生研究[J]. 石油炼制与化工, 2025, 56(6): 36-41.

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