Research and Development of An Inherently Safer Process for Cyclohexane Oxidation ---Experimental Studies of Cyclohexane Oxidation Using Pure Oxygen in Counterflow(III)

[[abstract]]本研究在前一年首先針對分散於環己烷液體內的純氧氣泡進行爆燃危害的實驗測試，以瞭解、驗證氣泡爆燃的可能危害，並尋求一液體內氣泡爆燃安全的氣液分散條件，做為本質安全的操作條件。由其結果顯示氣液分散條件與氣泡爆燃關聯不大，是隨時都存在，雖然單獨氣泡爆燃的能量有限不足危害，但當有可燃性氣相空間存在時，爆燃的氣泡可能擴展到氣相空間，導致氣相空間嚴重的爆燃，過壓可超過 10MPa，造成嚴重之危害。在瞭解此一危害特性後，本研究提出一新的反應方式，以管式反應器減少可能之氣相空間與滿槽氣液逆流方式及純氧做氧化劑，可具有使用純氧之高效率與避開氣相空間爆燃的危害，提高單位時間空間的產率。經由批次與連續式的反應測試，證實單位時間空間的產率可達使用攪拌槽與空氣的四倍，達到本質安全化與提升效率的目的。[[abstract]]On our previous year project, we performed experimental studies on the deflagration of high pressure, high temperature oxygen under different dispersion conditions. The aim is to find a criterion for gas dispersion, which renders the deflagration in oxygen bubbles nonhazardous. The results indicate that deflagration of oxygen bubbles is always exist and do not depend on the gas dispersion. Deflagration in single bubble in the liquid is found to produce insignificant energy to endanger the whole reactor. However, the bubble deflagration will propagate to the vapor space and results in severe deflagration. Bearing in mind that the major hazards present in the vapor space, this project proposed a new reaction method that utilize tubular reactor with countercurrent flow of liquid and oxygen under full liquid loading condition. The tubular reactor with full liquid loading reduces the potential volume of the vapor space and its associate deflagration hazards. It is confirmed through batch and continuous reaction tests that the space-time-productivity is almost quadrupled compared with traditional air oxidation process with stirring tank, achieving the aim of an inherently safer and better process for cyclohexane oxidation.[[note]]NSC91-2214-E327-00

Experimental Studies of Deflagration Hazards in High Pressure Oxidation Processes

[[abstract]]本研究利用小型絕熱卡計VSP(VentSizing Package)之壓力平衡理念、設計一新的測試罐，使其具有點火之爆炸測試功能，同時亦修改溫度壓力的數據擷取系統，提高數據擷取速度，以量得爆炸過程的快速升壓、升溫行為。本研究並進一步以高溫高壓的環己烷為對象，進行全世界文獻中首次的爆炸界限量測，此種高壓爆炸測試對一般的爆炸鋼球有極大之安全顧慮，但在本系統中，測試罐仍會爆裂、排放，但其過壓可由測試罐破裂、釋放至VSP之壓力緩衝槽而疏解，降低過壓危害。本研究最後由量測結果具體分析環己烷氧化製程可能的爆燃危害，對於提升環己烷氧化製程的安全性與產能、效率將有極大之貢獻。[[abstract]]A high pressure explosion test ingmodule was built based on existing Vent Sizing Package (VSP) currently held in our department. The existing test cells for VSP will be redesigned and allow an igniter to be inserted in the test cell. With the aids of the pressure containment design of the VSP, the new test cells are capable of performing explosion tests at conditions that resembles real oxidation processes. None of the existing explosion test facilities can perform these test owing potential hazards associated with elevated temperature and pressure. Explosion tests were performed for propylene and cyclohexane. Explosive limit were obtained for cyclohexane at conditions that resemble the cyclohexane oxidation in caprolactam process. The results are invaluable to the safe operation of the cyclohexane oxidation processes.[[note]]NSC89-2214-E327-00

桃園外海韓籍化學輪三湖兄弟號船難事件處理費

[[note]]IAC-98-02

96年萬安演習毒性化學物質部份委託演練規劃

[[note]]IAC-96-01

97年高雄縣毒性化學物質管理及災害防救工作計畫

[[note]]IAC-97-01

高縣重大海洋汙染災害應變演練委外技術服務案

[[note]]IAC-96-00

98年緊急應變系統操作維護

[[note]]IAC-98-02

有機酸氧化製程安全測試與設計計畫書

[[note]]IAC-100-14

The Studies on the Suppression of Accidental Release and Explosion of High-Pressure Liquefied Flammable Gases

[[note]]MOST104-2221-E327-002-MY