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.
出处
《化工学报》
EI
CAS
CSCD
北大核心
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).~~
