鉬催化劑 的英文怎麼說
中文拼音 [mùcuīhuàjì]
鉬催化劑
英文
molybdenum catalyst-
Abstract : the studies with infrared spectra and 15no exchange experiments have proved the existence of nitrogen oxide chemisorbed on the reduced state molybdena - alumina catalyst in the form of dinitrosyl
文摘:通過對紅外光譜及同位素交換反應后的分析，證明吸附在還原態鉬鋁催化劑上的no是以雙亞硝酰基形式存在的In order to improve the electro - catalytic activity of platinum based catalyst to methanol oxidation, in this thesis, firstly prepare heteropoly acid modified pt / gc electrode with different concentration by cyclic voltammetry method, and then test the cyclic voltammetry curves individually in vitriolic and methanol solution. the study shows the best concentration for both phosphomolybdic acid and phosphotungstic acid is 1 10 ~ ( - 3 ) mol / l. and find the more heteropoly acid modified on electrode, the lower peak - up potential towards methanol because of the existence of oxygenous species
為了改善鉑基催化劑氧化甲醇的催化活性，本論文首先通過循環伏安掃描法制備了不同濃度磷鉬酸和磷鎢酸修飾的pt / gc電極，通過研究pt / gc電極在修飾前後在硫酸溶液中及含甲醇的硫酸溶液中的循環伏安行為發現，磷鉬酸和磷鎢酸均能在ptru / c電極上發生氧化還原反應，而且雜多酸修飾濃度對pt / gc電極氧化甲醇的催化活性有很大影響。Thirty - one crystals of polyoxometalates ( 1d, 2d, 3d ) were prepared by means of middle hydrothermal technique, molecular design and self - assembly, and characterized structurally by single crystal x - ray diffraction. the thermal stability, activity of catalysis and magnetism of some compounds were systematically studied. the continuous appearance of p - v - o, p - mo - o, v - mo - o, v - o system with novel structure enrich polyoxometalate chemistry, the reaction characterization and the synthesis law of molybdates, tungstates and vanadates under hydrothermal conditions were explored
由於p - v - o 、 p - mo - o 、 v - mo - o 、 v - o體系新結構不斷出現，豐富了多金屬氧酸鹽化學，探討水熱條件下釩、鉬、鎢物種的反應特性和生成規律，研究原料的選擇、配比、加料順序、濃度、酸度、反應溫度、反應時間等因素對產物的生成及結構的影響，為新的催化劑、導電材料、磁性材料的研製與開發積累經驗。While still not evidenced in our experiment, liquid - phase doping of ammonium molybdate solution has been broadly agreed to be able to significantly increase the yield of swnts. we have developed another doping method, solid - phase doping of metal molybdenum at elevated temperature, and discovered that sol - gel prepared catalyst with such doping can be used to grow multi - wall carbon nanotube bundles in a very large scale
對催化劑進行摻鉬處理表明，它可顯著提高催化劑催化裂解甲烷合成納米碳管的能力：作者在高溫下進行了催化劑摻入金屬鉬的實驗，得到了一種性能優異的催化劑，以此制備的多壁納米碳管的呈束狀分佈，所得的粗產物與催化劑之間的重量比達15倍以上。Heteropoly blue q7pmo12o42 ( q = c5h5nc16h33 ) has been designed and synthesized as reaction - controlled phase - transfer catalyst for catalytic epoxidation of cyclohexene and catalytic oxidation of benzalcoho with h2o2 as the oxidant
設計合成了第一個由磷鉬雜多藍作為反應控制相轉移化劑的反應體系，用於對環己烯進行催化環氧化，苯甲醇進行催化氧化。I long product containing vanadium plant, molybdenum, nickel, cobalt, platinum, spent palladium catalyst
我廠長期求購含釩，鉬，鎳，鈷，鉑，鈀廢催化劑Catalyst mos2 k2co3 tio2 for mha from co h
採用浸漬法和干混法制備了一系列負載鉬的層柱分子篩催化劑Abstract : the leaching condition, separating principle and technological characteristics of recovering v, mo and ni from waste catalyst from oil refining are introduced with full hydrometallurgy, oxdation reduction method
文摘:介紹了全濕法冶金「氧化還原」法提取煉油廢催化劑中釩、鉬、鎳的浸出條件、分離原理及其技術特點。Heavy oil viscosity reduction of was studied by using toluene as additive for catalytic aquathermolysis reaction in this paper
摘要以鉬酸銨作為稠油水熱裂解反應的催化劑。Abstract : the demand, supply, price for molybdenum in 2000 in the world were reviewed. the present research and development of new products and techniques for molybdenum, such as low content alloy steels, stainless steels, molybdenum alloys, catalysts, lubricants, corrosion inhibitors and fire retardants etc. were described particularly
文摘:評述了2000年世界鉬的需求、供給和價格，特別是簡述了鉬新產品、新技術、諸如低合金鋼、不銹鋼、鉬合金、催化劑、潤滑劑和阻燃抑煙劑等的研究與開發進展。The traditional catalyst used in acetal ( ketal ) synthetic reaction is strong inorganic acid. but there is some limits to its use because of its side reaction, strong erosion and liability to pollute the environment. molybdophosphoric acid is used as catalyst and three condensation products are prepared through the direct reaction of aldehydes ( ketones ) and ethylene. in addition, several elements of affecting the reaction is researched. it is proved that molybdophosphoric acid is very active as catalyst in less addition, the product yield is quite high and the quality of reuse is quite good
縮醛（酮）合成反應的傳統催化劑為無機強酸，但由於副反應多、腐蝕性強和易污染環境等缺點，其使用受到限制.用磷鉬酸為催化劑，通過醛（酮）與乙二醇直接反應得到了三種縮合產物.對影響反應的諸因素進行研究，結果表明，用磷鉬酸作催化劑，用量小，活性高，產品收率較高，且重復使用性能較好Abstract : the traditional catalyst used in acetal ( ketal ) synthetic reaction is strong inorganic acid. but there is some limits to its use because of its side reaction, strong erosion and liability to pollute the environment. molybdophosphoric acid is used as catalyst and three condensation products are prepared through the direct reaction of aldehydes ( ketones ) and ethylene. in addition, several elements of affecting the reaction is researched. it is proved that molybdophosphoric acid is very active as catalyst in less addition, the product yield is quite high and the quality of reuse is quite good
文摘:縮醛（酮）合成反應的傳統催化劑為無機強酸，但由於副反應多、腐蝕性強和易污染環境等缺點，其使用受到限制.用磷鉬酸為催化劑，通過醛（酮）與乙二醇直接反應得到了三種縮合產物.對影響反應的諸因素進行研究，結果表明，用磷鉬酸作催化劑，用量小，活性高，產品收率較高，且重復使用性能較好Standard test method for total cobalt in alumina - base cobalt - molybdenum catalyst by potentiometric titration method
電位滴定法測定氧化鋁基鈷-鉬催化劑中總鈷含量的標準試驗方法Studies of catalysts for methane aromatization the reaction performance and surface property of mo - m hzsm - 5 catalysts under oxygen - free conditions
擔載型鉬催化劑上的丙烷芳構化The dispersion of mo species on the surface of al - clm and - al2o
3催化劑表面上鉬的分散性Because the tungsten from the phosphotungstic acid could pull out and deposit on the surface of catalyst, and the electronegativity of mo - o is smaller than that of w - o. the smaller the electronegativity is, the higher oxidation activity is. thus phosphomolybdic acid shows better catalytic oxidation activity than phosphotungstic acid
由於磷鎢酸中的鎢可以脫出並少量沉積到催化劑表面，而且從電負性來說mo - o的鍵能小於w - o ，鍵能小的雜多酸有較強的氧化性，所以鉬系雜多酸催化活性要好於鎢系雜多酸。The morphology of the catalysts was characterized with a transmission electron microscope ( tem ). modified the three electrodes with two different heteropolyacid respectively and test the well modified electrodes using the cyclic voltammetry and amperometric i - t curve
分別採用磷鉬酸和磷鎢酸對三種催化劑得到的催化電極進行了修飾，並用循環伏安曲線和不同電位下的恆電位i - t曲線測試了它們的性能。Standard test method for total molybdenum in fresh alumina - base catalysts
新制氧化鋁基催化劑中總鉬量的標準試驗方法分享友人