燃燒界限是製造、處理、運送或儲存引火性液體及可燃性氣體的重要安全指標之一，因此不論在純可燃氣體、多種可燃物氣體混合以及可燃氣體與惰性氣體混合的情況，許多學者針對燃燒界限從事量測實驗或者是建置其預測模式；在本研究中主要針對多種可燃氣體混合的情況探討，在相關的研究中發現Le Chatelier原理用來預測燃燒下限的結果效果不錯，但是在燃燒上限的部分則會有相當大的誤差，有些學者因此針對燃燒上限的部分提出修正參數，大幅改善了預測的結果，然而增加之修正項並無任何理論基礎做為依據。在我們過去的研究中，以質能平衡的觀點出發並結合絕熱火燄溫度的概念，提出碳氫可燃物氮氣與二氧化碳惰化燃燒界限預測模式解決上述的問題，本研究嘗試以過往之研究結果為基底，建置兩成分有機可燃氣體混合物之燃燒上限預測模式，在模式建置過程中會以可燃混合物總反應熱與每一成份之反應熱以及絕熱升溫相同的兩種假設模式進行，研究結果希望能夠釐清惰化對於有機可燃物混合物燃燒上限的影響，同時建立有效的預測模式。
In manufacturing, processing, transporting and storing combustible liquids and gases, people rank the flammability limits as a crucial safety index. Many researchers, therefore, carry out experiments on, or set up prediction models for, them, in situations of either pure combustible gas or mixture of several combustible gases as well as mixture of combustible gas and inert gas. In this research, we want to investigate the mixing of several combustible gases. Although previous researches have shown that satisfactory results about the prediction of flammability lower limits can be obtained by using Le Chatelier principle, there exists large error in the prediction of flammability upper limits. To grapple with the problem, some researchers proposed correction coefficients to modify the prediction; however, these coefficients bear no physical meanings. To solve this problem, we have developed a model that combine mass and energy balance and the conception of adiabatic flame temperature to predict the flammability limits of combustible hydrocarbons blended with inert nitrogen or carbon dioxide. Based on the previous outcome, this research aims to construct a prediction model for flammability limits of mixtures with two organic combustible gases. In developing the models, we will divide the work into two parts with the assumption either the molar reaction heats or the adiabatic temperature rises are equal for mixture and each compounds. We expect that the research can both clearly show the effect that inerting has on organic combustibles’ flammability limits and built effective prediction models for these combustibles.
