Analysis of catalyst runaway temperature causes for C2 hydrogenation unit during startup

Petroleum Refinery Engineering ›› 2025, Vol. 55 ›› Issue (7): 48-51.

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Analysis of catalyst runaway temperature causes for C2 hydrogenation unit during startup

Liu Jian, Yang Yuejin

SINOPEC (Henan) Refining and Chemical Co., Ltd., Luoyang, Henan 471012

Online:2025-07-15 Published:2025-07-21

碳二加氢装置开工催化剂飞温原因分析

刘健, 杨跃进

中石化（河南）炼油化工有限公司, 河南省洛阳市471012

作者简介:刘健, 高级工程师, 2010年毕业于西北大学化学工程与工艺专业, 现主要从事炼油化工生产技术管理工作。联系电话: 15838896495, E-mail: liujian.lysh@sinopec.com。

Abstract

Abstract:

This paper introduces the catalyst system, process principles and current status of temperature runaway in the C2 hydrogenation unit. Besides excess hydrogen in cracked gas, the main causes of catalyst runaway include CO concentration fluctuations, excessive C4 content and low space velocity. The mechanisms by which each factor triggers catalyst runaway are analyzed. Targeted measures are proposed: adding a propylene quencher at the reactor inlet to prevent triggering temperature runaway interlocks; stabilizing cracking furnace operation to ensure stable CO concentration; ensuring the C4 volume fraction at the first-stage hydrogenation reactor inlet is no more than 500 μL/L; and reasonably adjusting the reactor space velocity. These measures can effectively prevent temperature runaway of the C2 hydrogenation catalyst during startup and reduce economic losses during the ethylene unit startup.

Key words: C2 hydrogenation unit, startup, catalyst, temperature runaway, CO concentration, C4 content, space velocity, emergency quencher

摘要：

介绍了碳二加氢装置催化剂、工艺原理和飞温现状，除裂解气氢气过量外，造成催化剂飞温的主要原因包括CO浓度波动、碳四含量超标和空速低等。分析了各因素导致催化剂飞温的作用机理，提出了针对性的措施：在反应器入口增加丙烯紧急冷却器，避免触发反应器飞温联锁；稳定裂解炉操作，保证CO浓度稳定；保证加氢反应器一段入口碳四体积分数不大于500 μL/L；合理调整反应器空速。通过以上措施能够有效避免开工期间碳二加氢催化剂飞温，减少乙烯装置开工经济损失。

关键词: 碳二加氢装置, 开工, 催化剂, 飞温, CO浓度, 碳四含量, 反应空速, 紧急冷却器

Liu Jian, Yang Yuejin. Analysis of catalyst runaway temperature causes for C2 hydrogenation unit during startup[J]. Petroleum Refinery Engineering, 2025, 55(7): 48-51.

刘健, 杨跃进. 碳二加氢装置开工催化剂飞温原因分析[J]. 炼油技术与工程, 2025, 55(7): 48-51.

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Analysis of catalyst runaway temperature causes for C2 hydrogenation unit during startup

碳二加氢装置开工催化剂飞温原因分析

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