選擇氫化作用 的英文怎麼說
中文拼音 [xuǎnzháiqīnghuàzuòyòng]
選擇氫化作用
英文
selective hydrogenation-
This paper mainly aims at the strategic demands for large - aperture lightweight mirror proposed by high - tech development. its main research contents are : select material blank for lightweight mirror according to physical and chemical properties of optical glass ; analyze and calculate the deformation quantity of the mirror with finite element method ; design and optimize mirror body structure of 400 lightweight plane mirror and 450 lightweight spherical mirror, analyze glass cutting principle, design specisl - use grinding wheel structure, select reasonable technological parameters to implement the processing of weight reduction holes on 400 plane mirror ; analyze etching mechanism of hydrofluoric acid, look for the technological parameters such as the optimal acid concentration and etching time etc. ; eliminate the stress of weight reduction holes and micro - cracks on 400 lightweight plane mirror ; discuss the processing principle and
本論文的研究主要是瞄準國家高技術對大口徑輕型鏡的戰略需求而開展的。主要研究內容是：根據光學玻璃的物理與化學性能，選擇輕型鏡坯材料；用有限元法對鏡子的變形進行分析、計算，找出變形規律，優化設計400mm輕型平面鏡、 450mm輕型球面鏡鏡體結構；分析玻璃切削原理，設計專用磨輪結構，選擇合理工藝技術參數，完成400mm平面鏡輕量化減重孔的加工；分析氫氟酸腐蝕光學玻璃機理，尋找最佳酸濃度、腐蝕作用時間等工藝參數，實現400mm平面鏡減重孔應力與微裂紋的消除；討論分離器加工原理和工藝技術特點，完成400mm平面輕型鏡面形加工。By increasing the h2 dilution ratio, it is found that atomic hydrogen can selectively etch amorphous phase and stabilize crystalline phase. from the study on the distance from substrate to catalyzer, choosing a proper distance can ensure the gas fully decomposed, while a relatively low substrate temperature can cause the nanocrystalline particles to lose mobility and keep their sizes. the pre - carbonization process can enhance the nucleation density and make the growth of high quality nanocrystalline p - sic films much easier
實驗結果表明：隨著工作氣壓的減小，薄膜的晶粒尺寸有所減小；通過提高氫氣稀釋度，利用原子氫在成膜過程中起的刻蝕作用，可以穩定結晶相併去除雜相；選擇適當的熱絲距離能保證反應氣體充分分解，又使襯底具有較高的過冷度，是形成納米薄膜的重要條件；採用分步碳化法可以提高形核密度，有利於獲得高質量的納米- sic薄膜；襯底施加負偏壓可以明顯提高襯底表面的基團的活性，因負偏壓產生的離子轟擊還能造成高的表面缺陷密度，形成更多的形核位置。The method of optimization is the complex method. the objective function is the opration expenses of the hydrogen system. there were six decisive variables : the pressure and temperature of the high - pressure separator of vrds, gas ration to the prism unit from vrds unit and ssot unit, the pressure of the high - pressure separator of ssot and the entrance pressure of the cycle hydrogen compressor
優化問題以氫氣系統的運行費用函數作為目標函數，選擇了6個決策變量，分別為： vrds高壓分離器壓力、溫度、 vrds和ssot裝置排入prism的氫氣量、 ssot高壓分離器壓力和循環氫壓縮機入口壓力。The oxide film of zirconium on the sdses conceals its high hydrogen permeability because of its self passive effect with oxygcn, which limits its application as high h - permse1ective membran
1幾個納米厚的氧化鋯膜掩蓋了其本體的滲氫性能，使其在作為高選擇滲氫膜的應用上受到限制。Owing to their perfect hydrogen permeability and thermostability, palladium and palladium alloy membranes have been used as hydrogen separator and purifiers, and they can serve as membrane reactors for reactions such as dehydrogenation and hydrogen production, which integrates the reaction with separation and enhances the conversion and selectivity
鈀及其合金膜由於具有透氫性好和耐高溫的特點，除了用作氫氣分離和純化器外，還可以用作脫氫、制氫等反應的反應器，以實現反應和分離的一體化，並提高轉化率和選擇性。Application background and significance of hydrogen chloride preparation from byproduct hydrochloric acid desorption are intruduced ; basic rationale and technology process for preparation of gas hydrogen chloride by conventional resolution, variable pressure rectification and extraction rectification from hydrochloric acid are reviewed ; various methods are compared, explaining the suitable conditions, suggestions are made on the production process, equipments and materials ; improvement suggestions are put forward on hydrogen chloride preparation by byproduct hydrochloric acid desorption
摘要介紹了副產鹽酸解吸制取氯化氫技術的應用背景及意義；敘述了鹽酸常規解析、變壓精餾和萃取精餾制取氣態氯化氫的基本原理和工藝流程；對各種方法作了比較並說明了適用條件，對生產工藝、設備及材料的選擇提出了建議；提出了副產鹽酸解吸制取氯化氫應用的注意事項及改進建議。分享友人