發(fā)布時(shí)間：2018-02-26 16:48

  本文關(guān)鍵詞： 多端口進(jìn)料 制氫 重整反應(yīng) 反應(yīng)器　出處：《西安交通大學(xué)學(xué)報(bào)》2017年11期 　論文類型：期刊論文

【摘要】：針對(duì)傳統(tǒng)管式重整反應(yīng)器甲烷轉(zhuǎn)化率低的問題,設(shè)計(jì)了一種具有多端口進(jìn)料結(jié)構(gòu)的微型管式重整制氫反應(yīng)器,并采用COMSOL多物理場(chǎng)模擬軟件對(duì)該反應(yīng)器的重整性能進(jìn)行了計(jì)算研究,分析了反應(yīng)溫度、汽碳比等工作參數(shù)對(duì)其性能的影響規(guī)律。計(jì)算結(jié)果表明:當(dāng)反應(yīng)溫度在773~973K范圍內(nèi)變化時(shí),甲烷轉(zhuǎn)化率以及產(chǎn)物中H2、CO的摩爾分?jǐn)?shù)會(huì)隨反應(yīng)溫度升高而增大;當(dāng)汽碳比在2~4范圍內(nèi)變化時(shí),甲烷轉(zhuǎn)化率隨汽碳比增大而增大,而產(chǎn)物中H2、CO的摩爾分?jǐn)?shù)則隨著汽碳比的增大而減小;沿氣體流動(dòng)方向,甲烷轉(zhuǎn)化率和產(chǎn)物中H2、CO的摩爾分?jǐn)?shù)受進(jìn)料多端口特征的影響呈鋸齒狀波動(dòng)變化,并呈總體上升趨勢(shì),在反應(yīng)器出口處達(dá)到最大值。將多端口進(jìn)料結(jié)構(gòu)反應(yīng)器與傳統(tǒng)管式反應(yīng)器進(jìn)行比較研究,發(fā)現(xiàn)所提出的新結(jié)構(gòu)反應(yīng)器分別在600~1 100K的反應(yīng)溫度區(qū)間以及2~5汽碳比區(qū)間內(nèi)其甲烷轉(zhuǎn)化率都高于傳統(tǒng)管式反應(yīng)器;在873~973K區(qū)間內(nèi)甲烷轉(zhuǎn)化率可達(dá)93%左右;當(dāng)汽碳比增大到4后,繼續(xù)增大汽碳比對(duì)甲烷轉(zhuǎn)化率的提高已無(wú)明顯作用,建議合理的汽碳比區(qū)間為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.
【作者單位】： 西安交通大學(xué)建筑環(huán)境與能源應(yīng)用工程系;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(50976092) 陜西省科技攻關(guān)計(jì)劃資助項(xiàng)目(2015GY096)
【分類號(hào)】：TQ116.2

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本文編號(hào)：1538846