本文關(guān)鍵詞：聚乙烯醇修飾多孔氧化鋁載體及其表面化學(xué)鍍制備透氫鈀膜　出處：《電鍍與涂飾》2017年04期 　論文類型：期刊論文

  更多相關(guān)文章： 鈀膜 聚乙烯醇 化學(xué)鍍 氧化鋁 多孔載體 修飾 氫滲透

【摘要】：先采用聚乙烯醇(PVA)對多孔氧化鋁載體進(jìn)行修飾,再通過化學(xué)鍍制備了透氫性能良好的鈀膜。PVA修飾層不僅能夠有效改善粗糙載體的表面形貌,而且可通過熱處理從鈀復(fù)合膜中去除,以避免修飾層產(chǎn)生的透氫阻力。采用掃描電子顯微鏡(SEM)和能譜儀(EDS)分析了鈀復(fù)合膜的形貌和組成,并測定了其在350~500°C溫度范圍內(nèi)的氫氣滲透性能。結(jié)果表明,鈀膜厚度約為6μm,連續(xù)、致密,無明顯的針孔和其他缺陷。在溫度為500°C、滲透壓力為100 kPa的條件下,鈀復(fù)合膜的H_2滲透通量可達(dá)0.238 mol/(m~2·s),理想氣體分離因子α(H_2/N_2)達(dá)956,并且測試進(jìn)行100 h后其透氫性能依舊保持穩(wěn)定。
[Abstract]:Polyvinyl alcohol PVA (PVA) was used to modify the porous alumina carrier, and then the surface morphology of rough support was improved effectively by electroless plating of palladium film 路PVA modified layer with good hydrogen permeability. Moreover, the PD composite membrane can be removed by heat treatment to avoid the hydrogen permeation resistance of the modified layer. The morphology and composition of the PD composite membrane were analyzed by scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS). The hydrogen permeability of PD film was measured in the temperature range of 350 鈩，

本文編號：1380835