摘要
碳气化反应是铁氧化物碳热还原的重要环节.为了揭示各因素对碳气化反应热力学的影响规律,本文就温度对碳气化反应平衡常数和平衡CO压力分数,碳储能对平衡常数、平衡温度和平衡CO压力分数,以及总压和惰性气体分压对平衡温度和平衡CO压力分数的影响进行了理论分析.结果表明,储能/温度一定时,平衡常数随温度/储能的增加而增大.储能、总压和惰气分压一定时,平衡CO压力分数随温度的升高而增大;温度、总压和惰气分压一定时,平衡CO压力分数随储能的增加而增大,导致在一定总压和惰气分压下达到相同的平衡CO压力分数所需温度降低.在温度、储能和惰性气体分压一定的条件下,当总压、惰气分压和平衡常数之间满足一定代数关系时,平衡CO压力分数随总压的增加而增大/减小,导致在一定储能和惰气分压下达到相同的平衡CO压力分数所需温度降低/提高.在一定温度、储能和总压下,平衡CO压力分数随惰气分压的增加而减小,导致在一定储能和总压下达到相同平衡CO压力分数所需温度提高.
Carbon gasification is an important step for the carbothermic reduction of iron oxides. For the purpose of revealing the mechanism of the factors impacting the carbon gasification thermodynamics, it conducted theoretical analysis on the impact of temperature on equilibrium constant and equilibrium CO pressure fraction, and the impact of stored energy for carbon on equilibrium constant, temper- ature and CO pressure fraction, as well as the total pressure and the partial pressure of inert gas on the equilibrium temperature and CO pressure fraction. Result shows that given the temperature/stored energy fixed, equilibrium constant increases with the increase of stored energy/temperature. Given the stored energy, when the total pressure and the partial pressure of inert gas are fixed, the equilib- rium CO pressure fraction increases with the increase of temperature. Given the temperature, when the total pressure and partial pres- sure of inert gas are fixed, the equilibrium CO pressure fraction increases with the increase of stored energy, which leads to the de- crease of the equilibrium temperature for reaching an equal level of CO pressure fraction under certain total pressure and partial pressure of inert gas. Given the temperature, when the stored energy and partial pressure of inert gas are fixed, if only the total pressure, partial pressure of inert gas, and equilibrium constant satisfy ceratin algebraic relation by their values, the equilibrium CO pressure fraction in- creases/decreases with the increase of the total pressure, subsequently leading to the decrease/increase of the equilibrium temperature for reaching an equal level of CO pressure fraction under certain stored energy and partial pressure of inert gas. Given the temperature, when the stored energy and total pressure are fixed, the equilibrium CO pressure fraction decreases with the increase of the partial pres- sure of inert gas, which leads to the increase of the equilibrium temperature for reaching an equal level of equilibrium CO pressure frac-
出处
《内蒙古科技大学学报》
CAS
2013年第2期201-204,共4页
Journal of Inner Mongolia University of Science and Technology
基金
国家自然科学基金资助项目(51164026
50704021)
2.内蒙古自然科学基金资助项目(2012MS0710)
关键词
碳气化
热力学
储能
CO压力分数
总压
惰气分压
carbon gasification, thermodynamics, stored energy, CO pressure fraction, total pressure, partial pressure of inert gas
