甲烷与正丁烷微小尺度催化燃烧性能比较

发布时间：2018-06-16 15:59

本文选题：甲烷 + 正丁烷　；参考：《化工学报》2017年03期

【摘要】：对微圆管内甲烷和正丁烷在Pt/ZSM-5上的催化燃烧进行实验研究,获得并分析了二者的稳燃范围、产物浓度、壁温分布和壁面散热等燃烧性能。发现在富燃条件下甲烷和正丁烷能够在大当量比下实现催化自稳燃烧。相同流量下正丁烷稳燃当量比范围宽于甲烷,贫燃范围在0.4附近。流量由200 ml·min~(-1)增大至1000 ml·min-1,甲烷和正丁烷转化率出现大幅下降。在实验范围内,正丁烷和甲烷的转化率差异不大。化学当量比条件下随流量增大,正丁烷的转化率在600 ml·min~(-1)开始高于甲烷。甲烷和正丁烷能够在散热比例高达70%的情况下自稳催化燃烧且转化率在95%以上。相同流量下,与甲烷相比,正丁烷催化燃烧的壁温、散热功率和散热比例都更高。整体来看,正丁烷催化稳燃范围较甲烷略宽,两者转化率曲线相近,放热功率和壁面散热功率相差较小,正丁烷在必要时可作为甲烷的替代燃料。
[Abstract]:The catalytic combustion of methane and n-butane on Pt / ZSM-5 in a microtube was studied experimentally. The combustion properties such as stable combustion range, product concentration, wall temperature distribution and wall heat dissipation were obtained and analyzed. It is found that methane and n-butane can achieve catalytic autostable combustion under the condition of rich combustion. At the same flow rate, the equivalent ratio of n-butane stable combustion is wider than that of methane, and the lean combustion range is about 0.4. When the flow rate increased from 200ml to 1000 ml min-1, the conversion of methane and n-butane decreased significantly. In the experimental range, the conversion of n-butane and methane has little difference. The conversion of n-butane began to be higher than that of methane at 600ml / min ~ (-1) with the increase of flow rate under the condition of chemical equivalent ratio. Methane and n-butane can be self-stabilized catalytic combustion with conversion of more than 95% when the heat dissipation ratio is up to 70%. At the same flow rate, the wall temperature, heat dissipation power and heat dissipation ratio of n-butane catalytic combustion are higher than those of methane. On the whole, the range of n-butane catalytic stable combustion is slightly wider than that of methane, and the conversion curve is similar, and the difference between exothermic power and wall heat dissipation power is small. N-butane can be used as a substitute fuel for methane when necessary.
【作者单位】：浙江大学能源清洁利用国家重点实验室;
【基金】：国家自然科学基金项目(51336010) 中央高校基本科研业务费专项资金项目(2016FZA4011)~~
【分类号】：O643.36

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