多端口进料微型管式重整制氢反应器性能研究

发布时间：2018-02-26 16:48

本文关键词： 多端口进料制氢重整反应反应器　出处：《西安交通大学学报》2017年11期 　论文类型：期刊论文

【摘要】：针对传统管式重整反应器甲烷转化率低的问题,设计了一种具有多端口进料结构的微型管式重整制氢反应器,并采用COMSOL多物理场模拟软件对该反应器的重整性能进行了计算研究,分析了反应温度、汽碳比等工作参数对其性能的影响规律。计算结果表明:当反应温度在773~973K范围内变化时,甲烷转化率以及产物中H2、CO的摩尔分数会随反应温度升高而增大;当汽碳比在2~4范围内变化时,甲烷转化率随汽碳比增大而增大,而产物中H2、CO的摩尔分数则随着汽碳比的增大而减小;沿气体流动方向,甲烷转化率和产物中H2、CO的摩尔分数受进料多端口特征的影响呈锯齿状波动变化,并呈总体上升趋势,在反应器出口处达到最大值。将多端口进料结构反应器与传统管式反应器进行比较研究,发现所提出的新结构反应器分别在600~1 100K的反应温度区间以及2~5汽碳比区间内其甲烷转化率都高于传统管式反应器;在873~973K区间内甲烷转化率可达93%左右;当汽碳比增大到4后,继续增大汽碳比对甲烷转化率的提高已无明显作用,建议合理的汽碳比区间为3~4。
[Abstract]:Aiming at the problem of low methane conversion rate in traditional tubular reforming reactor, a micro tubular reforming hydrogen production reactor with multi-port feed structure was designed. The reforming performance of the reactor was calculated and studied by using COMSOL multi-physical field simulation software. The influence of reaction temperature, steam / carbon ratio and other working parameters on the performance of the reactor was analyzed. The results showed that the reaction temperature varied in the range of 773N 973K. The conversion of methane and the mole fraction of H _ 2CO in the product will increase with the increase of the reaction temperature, and the conversion of methane will increase with the increase of the ratio of steam to carbon when the ratio of steam to carbon changes in the range of 2C _ 4. However, the mole fraction of H _ 2CO in the product decreases with the increase of the ratio of vapor to carbon, and the conversion of methane and the mole fraction of H _ 2CO in the product are sawtooth fluctuation along the direction of gas flow, and the overall upward trend is observed. The maximum value is reached at the outlet of the reactor. The multi-port feed structure reactor is compared with the traditional tubular reactor. It is found that the methane conversion rate of the proposed new structure reactor is higher than that of the traditional tubular reactor in the reaction temperature range of 600 ~ 1 100K and the steam / carbon ratio of 2 ~ 5 respectively, and the methane conversion rate can reach about 93% in the region of 873? 973K, and when the steam / carbon ratio increases to 4, the methane conversion rate of the new reactor is higher than that of the conventional tubular reactor. Increasing the ratio of steam to carbon has no obvious effect on methane conversion. A reasonable range of steam to carbon ratio is suggested to be 3 ~ 4.
【作者单位】：西安交通大学建筑环境与能源应用工程系;
【基金】：国家自然科学基金资助项目(50976092) 陕西省科技攻关计划资助项目(2015GY096)
【分类号】：TQ116.2

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