论文部分内容阅读
为了研究真空紫外光降解瓦斯过程的反应动力学规律,在自制的真空石英光化学反应器中以含甲烷标准气体模拟矿井瓦斯,运用Langmuir-Hinshelwood(L-H)拟一级反应动力学模型对不同光照强度、氧气体积分数、甲烷初始体积分数和水分子体积分数下瓦斯(甲烷)的降解过程进行拟合。结果表明:真空紫外光降解瓦斯反应动力学规律符合一级反应动力学特性;光照强度、甲烷初始体积分数、氧气体积分数和水分子体积分数是影响真空紫外光降解瓦斯的主要因素;瓦斯(甲烷)降解的反应速率随光照强度和氧气体积分数增大而增大,随甲烷初始体积分数增大而减小,随水分子体积分数增大而先增大后减小。
In order to study the reaction kinetics of methane under vacuum ultraviolet light degradation, the mine methane was simulated by a methane-containing standard gas in a self-made vacuum quartz photochemical reactor. The Langmuir-Hinshelwood (LH) pseudo first-order reaction kinetics model was used to simulate the different light intensities , Oxygen volume fraction, methane initial volume fraction and methane (methane) degradation under the water volume fraction. The results showed that the kinetics of gas reaction in vacuum ultraviolet degradation was in accordance with the first-order reaction kinetics. The light intensity, the initial methane concentration, the oxygen volume fraction and the water volume fraction were the main factors affecting the gas degradation by vacuum ultraviolet light. ) Degradation rate increased with the increase of light intensity and oxygen volume fraction, decreased with the increase of initial volume fraction of methane, and then increased with the increase of volume fraction of water molecules.