多孔介质内H2S贫氧燃烧制氢数值模拟

为探索H2S在多孔介质内超绝热缺氧燃烧裂解制氢的机理,采用流体力学数值模拟与化学动力学研究相结合的方法,使用一个17组分、57步的复杂化学反应机理,模拟了H2S在直径为3 mm的Al2O3圆球堆积的多孔燃烧反应器内的缺氧燃烧制氢过程,模拟结果与试验数据基本吻合.模拟结果显示:富燃条件下,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、制氢提供了高温环境,H2S部分裂解生成单质硫和氢气,从而实现了对硫化氢中的硫和氢同时利用的目的.

Numerical simulation of hydrogen production in porous media from hydrogen sulfide by partial oxidation

In order to probe into the mechanism of recovery of sulfur and hydrogen from hydrogen sulfide in porous media by superadiabatle partial oxidation, the combination of computational fluid dynamics and ehemcial kinetics investigation was employed to model the filtration combustion of hydrogen sulfide in a 3-mm-diameter-Al2O3 -sphere packed bed through a 17-species, 57-elemental reaction mechanism. The results of the simulation show good agreement with experimental data. The numerical results also show that the combustion temperature exceeds the theoretic combustion temperature, which can offer the high-temperature environment for the decomposition of hydrogen sulfide to produce hydrogen and sulfur.