多孔介质内H_2S超绝热燃烧制氢的数值模拟  

Modeling hydrogen production in super-adiabatic combustion of hydrogen sulfide in porous media

作　　者：李国能[1] 周昊[1] 钱欣平[1] 凌忠钱[1] 岑可法[1] 

机构地区：[1]浙江大学能源清洁利用国家重点实验室,浙江杭州310027

出　　处：《化工学报》2006年第9期2175-2179,共5页CIESC Journal

基　　金：国家自然科学基金项目(20307007).~~

摘　　要：为探索H2S在多孔介质内超绝热燃烧裂解制硫制氢的机理,采用计算流体力学(CFD)与CHEMKIN相结合的方法,使用标准k-ε湍流模型和一个17组分、57步复杂化学反应机理,模拟了H2S在直径为3mm的Al2O3圆球堆积成的多孔介质内的燃烧,模拟结果与实验数据基本吻合.模拟结果显示:多孔介质内H2S的燃烧温度超过了绝热燃烧温度,为H2S的裂解制硫制氢提供高温环境,富燃条件下H2S部分地裂解生成单质硫和氢气.另外,对采用的复杂化学反应机理是否适用于多孔介质内H2S燃烧时各向异性火焰的模拟作了有意义的探索.In order to probe into the mechanism of production of sulfur and hydrogen in the super-adiabatic combustion of hydrogen sulfide in porous media, computational fluid dynamics （CFD） was employed combining with CHEMKIN to model the combustion of hydrogen sulfide in porous media of a 3-mm- diameter-Al2O3-sphere packed bed. The standard k-ε turbulence model and a 17-species, 57-elemental reaction mechanism were used in numerical simulation. The numerical results showed good agreement with the experimental data. The combustion temperature exceeded the theoretical combustion temperature which offered a high temperature for the decomposition of hydrogen sulfide. Sulfur and hydrogen could be obtained through combustion in porous media in rich-fuel condition. The numerical results also showed that the combination of CFD with complex chemical reaction mechanism performed well in modeling the anisotropic flame of hydrogen sulfide in porous media.

关 键 词：多孔介质 超绝热燃烧 计算流体力学 复杂化学反应机理 

分 类 号：TK124[动力工程及工程热物理—工程热物理]