内置多孔介质卷式反应器富燃制氢实验研究

设计了一个新型内置多孔介质卷式制氢反应器,进行了天然气/空气预混气在当量比1.25~2.50,总流量60 L/min~120 L/min条件下的富燃实验,研究其自热重整制氢的燃烧特性。结果表明,富燃情况下可实现自维持燃烧,自稳定响应时间较快;反应器Swiss-roll结构的有效预热与中心多孔介质的蓄热,可提高反应温度至1 600 K以上,实现超绝热富燃制氢;固定流量条件下,甲烷的转化效率与能量利用率随着当量比的变化而改变。实验中,氢气生成率与能量利用率分别为30%~57%、50%~84%。流量为120 L/min,当量比为2.0时,尾气中H2浓度达22%,氢气生成率为57%,能量利用率为68%。

Experimental study on hydrogen production from methane rich combustion in built-in porous media Swiss-roll reactor

A new type of hydrogen-generation reactor with porous ceramics arranged regularly inside and a Swiss-roll heat exchanger outside was designed. The fuel rich combustion experiment was investigated with the mixture of methane and air at an equivalence ratio ranging from 1.25 to 2.50 and a total flow rate ranging from 60L/min to 120L/min. The combustion characteristics of auto thermal reforming were studied. The experimental results show that it can realize the self-maintenance combustion and come to the self-stabilization fast in the fuel-rich conditions. The preheating effects of Swiss-roll structure and the heat storage of porous media can raise the reaction temperature to more than 1600K, and realize the superadiabatic fuel rich combustion. The hydrogen production rate and energy utilization which change inconsistently with the equivalence ratio at a fixed total flow rate range can reach 30%~57% and 50%~84%, respectively. The maximum molar fraction of hydrogen, hydrogen production rate and energy utilization are up to 22%, 57%, and 68%, respectively at an equivalence ratio of 2.0.