本文選題：硼氫化鈉 + 催化劑��； 參考：《長安大學(xué)》2017年碩士論文

【摘要】：硼氫化鈉作為儲氫材料,其具有產(chǎn)氫純度高、容量儲存高、無污染、反應(yīng)條件簡單等諸多優(yōu)點,從而引起了廣泛的關(guān)注。硼氫化鈉水解制氫產(chǎn)生的氫氣純度較高,滿足PEMFC系統(tǒng)氫氣使用的要求,從而與PEMFC有機(jī)地結(jié)合。而在近些年的研究中發(fā)現(xiàn),要廣泛應(yīng)用硼氫化鈉水解制氫,其首要問題是需要找到更為合適的催化劑,以便高效、廉價地應(yīng)用于硼氫化鈉儲氫體系。本文主要研究了CoB分別與La_2O_3、CeO_2、Pr_6O_(11)、Nd_2O_3、Sm_2O_3、Yb_2O_3、Y_2O_3以不同的比例混合,然后在混合催化劑含量分別為2%、3%、4%、5%下的各個體系對硼氫化鈉水解放氫的影響。實驗首先利用硼氫化鈉制備硼化鈷;然后采用排水法測得水解反應(yīng)的放氫量;最后通過分析了在不同體系與不同摻雜比下的催化劑對硼氫化鈉水解放氫量、平均放氫速率的影響,研究了硼氫化鈉催化水解放氫性能。研究結(jié)果表明,稀土氧化物對硼氫化鈉水解反應(yīng)的影響與稀土氧化物的種類、混合催化劑的比例以及摻雜比有著緊密聯(lián)系。對于不同類型的稀土氧化物,當(dāng)混合催化劑比例增加時,硼氫化鈉水解平均反應(yīng)速率普遍增加,且為5%反應(yīng)速率達(dá)到最大。通過比較發(fā)現(xiàn),混合催化劑含量3%,摻雜10%La2O3的硼氫化鈉水解反應(yīng)放氫量最大,且為2905.3 ml·g~(-1)。混合催化劑含量5%,摻雜10%Nd2O3的硼氫化鈉水解平均反應(yīng)速率最快,且為3485.4 ml·g~(-1)·min~(-1)。
[Abstract]:As a hydrogen storage material, sodium borohydride has many advantages, such as high hydrogen production purity, high capacity storage, no pollution, simple reaction conditions and so on. The hydrogen produced by hydrolysis of sodium borohydride to produce hydrogen is of high purity, which meets the requirements of hydrogen in PEMFC system and thus combines organically with PEMFC. In recent years, it has been found that in order to widely use sodium borohydride hydrolysis to produce hydrogen, the most important problem is to find a more suitable catalyst for the efficient and cheap application of sodium borohydride hydrogen storage system. In this paper, we mainly study the effect of CoB on the hydrogen liberation of sodium borohydride water at different proportions, respectively, and the CoB and LaShe _ 2O _ 3CeO _ (11) Nd2O3S _ (11) Nd2O6O _ (11) / Nd2OO _ (11) / Nd2O-O _ (11) have been mixed in different proportions. First, cobalt borate was prepared from sodium borohydride; then the amount of hydrogen released from hydrolysis reaction was measured by drainage method; finally, the amount of hydrogen released from sodium borohydride in water was analyzed through the analysis of catalysts in different systems and different doping ratios. The effect of average hydrogen release rate on the catalytic performance of sodium borohydride for water liberation of hydrogen was studied. The results show that the effects of rare earth oxides on the hydrolysis of sodium borohydride are closely related to the type of rare earth oxides, the proportion of mixed catalysts and the doping ratio. For different rare earth oxides, the average rate of hydrolysis of sodium borohydride increases generally when the ratio of mixed catalysts increases, and the reaction rate of 5% reaches the maximum. By comparison, it was found that the amount of hydrogen released from hydrolysis of sodium borohydride doped with 10 La 2O 3 was the largest, and the amount of hydrogen released was 2905.3 ml g ~ (-1). The average hydrolysis rate of sodium borohydride doped with 10Nd2O3 was the fastest, and the reaction rate was 3485.4 ml g ~ (-1) min ~ (-1).
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：O643.36;TQ116.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 Christiaan H.L.Tempelman;Xiaochun Zhu;Emiel J.M.Hensen;;用于甲烷芳構(gòu)化的Mo/HZSM-5催化劑的活化（英文）[J];催化學(xué)報;2015年06期

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本文編號：2088731