本文選題：水合肼脫氫 + 載體　； 參考：《安徽工業(yè)大學》2017年碩士論文

【摘要】：隨著化石燃料的持續(xù)消耗帶來的能源危機,新能源的開發(fā)和利用成為了未來能源社會的發(fā)展方向。氫能,作為一種高效、清潔、來源豐富的二次能源,被認為是未來人類的理想能源之一。然而,由于氫氣具有很低的體積能量密度和質(zhì)量能量密度,安全、高效地儲存和運輸氫氣成為實現(xiàn)氫能社會的一大挑戰(zhàn)。為了解決這一難題,開發(fā)安全和高效的化學儲氫材料替代傳統(tǒng)的化石燃料引起了人們廣泛的研究興趣。其中,水合肼具有很高的質(zhì)量能量密度(8 wt%),而且在室溫下呈液態(tài),可以安全地儲存和運輸。更重要的是,水合肼完全分解的產(chǎn)物只有氫氣和氮氣,沒有其他固體副產(chǎn)物。本文研究內(nèi)容是開發(fā)一種在溫和條件下能夠高效催化水合肼脫氫的催化劑。實驗采用簡單的共還原法將Ni、Pt納米粒子固定于Li Cl改性的g-C_3N_4載體上,在堿性條件下進行水合肼分解。研究結(jié)果表明,水合肼脫氫在Ni_6Pt_4/g-C_3N_4納米片催化劑催化作用下催化性能最好,水合肼分解在50°C、120 mg NaOH情況下1.5 min可完全反應。H2選擇性可高達100%。所以催化劑Ni_6Pt_4/g-C_3N_4納米片具有優(yōu)越的催化性能。在此催化劑的基礎(chǔ)上做了進一步的改進,結(jié)果顯示,加入Mn(NO_3)_2溶液對g-C_3N_4納米片載體做進一步的改性,質(zhì)量分數(shù)為50%的Mn(NO_3)_2溶液為2 ml、Ni、Pt金屬負載比例為4:6時,制備出的Ni4Pt6/MnO_x-g-C_3N_4納米片催化劑催化性能最好。此催化劑催化水合肼在50°C、120 mg NaOH情況下完全分解需要時間為1.2 min,H2選擇性可高達100%,與Ni_6Pt_4/g-C_3N_4納米片催化劑相比,催化性能更好,具有很好的應用前景。
[Abstract]:With the sustainable consumption of fossil fuels, energy crisis, the development and utilization of new energy has become the future direction of energy society. Hydrogen energy, as a kind of high efficient, clean and abundant secondary energy, is considered to be one of the ideal energy sources in the future. However, due to the low volume energy density and mass energy density of hydrogen, the safe and efficient storage and transport of hydrogen has become a major challenge to realize hydrogen energy society. In order to solve this problem, the development of safe and efficient chemical hydrogen storage materials instead of traditional fossil fuels has attracted widespread interest. Hydrazine hydrate has a high mass energy density of 8 wtand is liquid at room temperature and can be safely stored and transported. More importantly, hydrazine hydrate completely decomposes the products only hydrogen and nitrogen, no other solid by-products. In this paper, a catalyst for dehydrogenation of hydrazine hydrate under mild conditions was developed. A simple co-reduction method was used to immobilize the nioct Pt nanoparticles onto the g-C_3N_4 support modified by LiCl and decompose hydrazine hydrate under alkaline conditions. The results show that the catalytic performance of hydrazine hydrate dehydrogenation is the best under the catalysis of Ni_6Pt_4/g-C_3N_4 nanoparticles, and the selectivity of 1. 5 min can be up to 100% when the decomposition of hydrazine hydrate is 50 擄C ~ (2) mg / NaOH. Therefore, the catalyst Ni_6Pt_4/g-C_3N_4 nanoparticles have excellent catalytic performance. On the basis of this catalyst, further improvement was made. The results showed that the support of g-C_3N_4 nanoparticles was further modified by adding Mn(NO_3)_2 solution, when the loading ratio of 2 ml / NiPt metal to 50% Mn(NO_3)_2 solution was 4:6, The catalytic performance of the prepared Ni4Pt6/MnO_x-g-C_3N_4 nanocrystalline catalyst is the best. The catalytic activity of this catalyst for the complete decomposition of hydrazine hydrate at 50 擄C ~ (-1) (120 mg / NaOH) was 1.2 min / h ~ (2). Compared with the Ni_6Pt_4/g-C_3N_4 nanoscale catalyst, the catalytic performance of the catalyst was better, and the catalyst had a good prospect of application.
【學位授予單位】：安徽工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：O643.36;O623.752

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