distillation fraction 中文意思是什麼

distillation fraction 解釋
蒸餾餾份
  • distillation : n. 1. 蒸餾（作用）；蒸餾法。2. 蒸餾液；蒸餾物。3. 精華，精萃。
  • fraction : n. 1. 小部分，碎片，片斷。2. 一些，一點兒。3. 【化學】分餾，分層，分級。4. 【宗教】聖餐麵包分切式。5. 【數學】分數。
  1. Indeed, atmospheric distillation may be terminated with a lower boiling fraction ( “ cut ” ) if it is thought that vacuum or steam distillation will yield a better quality product or if the process appears to be economically more favorable

    但是，經過蒸餾處理的大多數原油，包括比重較大、粘度更大的原油，一般都分離為較輕組分（氣、汽油、粗汽油、煤油和粗柴油）和殘渣，或者更多稱作常壓重油。
  2. Then, analytical work was carried out as follows : the ultimate analysis and physi - chemical analysis of the pyrolytic oil comprised a sketch of the fuel properties of the oil ; then, through the distillation analysis of the oil, the fraction composition of the " unrefined " oil was known. after that, a general knowledge of the aromaticity and saturation of the hydrocarbons in the oil was provided by the outcome of the ft - ir functional group analysis. also, from the analysis, the form of the polar functional groups and their distribution in different fractions of the oil were learned

    文中首先對不同熱解溫度下熱解油產率進行分析討論，然後，針對熱解油品質進行了一系列分析：通過元素組成和理化特性的分析，對熱解油作為燃料特性有了一個大致了解；通過實沸點蒸餾分析，得到熱解油作為一種未提煉油的餾分分佈，並為后續熱解油餾分的細入分析提供了前提；通過對熱解全油和各窄餾分的ft - ir官能團分析，對熱解油的芳香性、不飽和性有了整體的了解，並且清楚了熱解油中的極性官能團存在型式及其在熱解油不同餾分中的分佈。
  3. Firstly, based on the present research all over the world, a 3d quasi - single phase model is built together with k - equations. the special feature of this model is taking account of the influence of interaction between liquid and gas, that is to say, the influence of interphase drag force, lifting force perpendicular to the relative velocity, virtual mass force and gas or liquid volume fraction in the fluid field have been considered. a 3d two - fluid model is also built in order to describe more accurately the fluid flow on distillation trays by comparing the computational results of quasi - single phase mathematical model with of two - fluid mathematical model

    本文在國內外已有的研究基礎上，首先建立了以k - （封閉模型為基礎的三維擬單相流模型，該模型的特點在於充分考慮了氣液兩相間相互作用的影響，即計入了相間曳力、橫向升力、虛擬質量力和氣、液相含率對流場的影響；並建立了塔板三維雙流體模型，主要目的是通過對比擬單相流數學模型、雙流體數學模型的計算結果，建立能夠準確描述塔板上流體流動的數學模型。
  4. Abstract : the fraction compositions, group compositions and structure compositions of seve n catalytic stocks were determined by means of vacuum distillation, mass spectrum, element analysis and molecular mass measurement

    文摘:採用減壓蒸餾、質譜分析、元素分析和分子質量測定對遼河原油的7種催化原料油進行了餾分組成、族組成和結構族組成的分析。
  5. Secondly, for the first time, by volume average concept and reynolds time - average method, a 3d quasi - single phase mass transfer model of distillation tray is deduced by considering the effects of velocity fluctuation, concentration fluctuation and volume fraction of gas and liquid on mass transfer. a source item sc for interphase mass transfer is considered. by applying conventional method of estimating the interphase mass transfer coefficient, a formula for sc is obtained

    其次，採用體平均概念、雷諾時均化方法結合塔板氣液相互作用的實際情況首次推導了考慮速度、濃度脈動項和氣、液相含率影響的塔板三維擬單相流湍流傳質模型，源相中考慮了氣液相間傳質項sc ，並運用化工中關于相間傳質系數計算的理論，推導了sc的表達式。
  6. A volatile, flammable fraction of petroleum, obtained by distillation and used as a solvent

    石油類是石油當中易揮發，易點燃的成分。通過蒸餾獲得，用作溶劑
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