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针对微动力装置中重整腔内催化剂表面容易积碳,重整反应需要大量能量等问题,在重整腔入口引入氧气,使甲烷发生部分氧化反应为催化重整提供热量。本文采用数值方法研究了微细腔中CH_4/O_2/H_2O镍基催化剂上的自热重整反应,重点分析CH_4/O_2/H_2O混合物组分对甲烷自热重整反应及积碳的影响。结果表明:在混合物组分CH_4/O_2/H_2O摩尔比为1:0.2:2时,甲烷自热反应放热量刚好能满足甲烷重整反应的需求,氢气质量分数较高为3.32%,积碳浓度较低为1.19×10~(-6) kmol/m~2。
Aiming at the problems that the catalyst surface in the reforming cavity in the micromotor device is easy to carbon deposit and the reforming reaction needs a large amount of energy and the like, oxygen is introduced into the reforming cavity inlet to provide a partial oxidation reaction of methane to provide heat for catalytic reforming. In this paper, the autothermal reforming reaction of CH_4 / O_2 / H_2O nickel based catalysts in micro-cavity was studied numerically. The effects of CH_4 / O_2 / H_2O mixture on the autothermal reforming of methane and carbon deposition were analyzed emphatically. The results showed that when the molar ratio of CH_4 / O_2 / H_2O was 1: 0.2: 2, the exothermic heat of methane reaction just met the demand of methane reforming reaction, the hydrogen content was 3.32%, the carbon concentration The lower one is 1.19 × 10 ~ (-6) kmol / m ~ 2.