摘要:

On the basis of the studies concerning the determination of the surface free energy of Polish coals published earlier analyses of the equilibrium state of three-phase system were carried out. The three-phase systems were:

ISSN:0884-3759    

DOI:10.1080/08843758908962234

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

Fractions 100-150, 150-200, 200-250°C were distilled from medium Iraqi crude oil. The thermo-oxidation stability experiments were carried out on original and inhibited (with Topanol 0) distillate fractions using the Alcor Jet Fuel Thermal Tester, over a temperature range 516-573 k. It was found that the antioxidant (Topanol 0) efficiency depends on the fractions composition and the oxidation temperature. Only 30 PPM of Topanol 0 stabilizes fraction 100-150°C to a considerable extent. Also, an inhibition effect is obtained in fraction 150-200°C but at a higher antioxidant concentration (90 PPM). Only, slight inhibition effect was observed in fraction 200-250°C at low oxidation temperature (below 551 K), while effect will be of no value at higher oxidation temperatures.

ISSN:0884-3759    

DOI:10.1080/08843758908962235

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

A mixture of n-hexane and n-pentane (1:1) by volume was isomerized on commercial Pt-alumina catalyst in a continuously fixed-bed reactor at atmospheric pressure. The effect of temperature, LHSV, hydrogen/hydrocarbon molar ratio and chlorine concentration were studied.

ISSN:0884-3759    

DOI:10.1080/08843758908962236

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

Maya 650°F residuum was mildly prehydrogenated over a standard, commercially available, hydrodesulfurization catalyst. The product was then distilled to yield hydrogenated Maya 650°F residuum. This prehydrogenated residuum, and the untreated Maya 650°F residuum were separately hydroprocessed further at different process severities. The resulting products were then examined by elemental analyses to determine the effects of die prehydrogenation step on overall conversion and product quality.

ISSN:0884-3759    

DOI:10.1080/08843758908962237

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

Arab light crude oil has been characterized in terms of API gravity, total sulfur content, Reid vapor pressure, ash content, heating value, salt content, viscosity SUS, vanadium content as V2O5, pour point and analyses of various metals. The crude oil was fractionated into six true boiling point (TBP) fractions (IBP-95°C, 95-205°C, 205-260°C, 260-345°C, 345-455°C and 455°C+). These fractions were characterized in terms of API gravity, total sulfur, H2S, mercaptan contents, molecular weight, elemental analyses for total carbon, hydrogen and nitrogen, and analyses of various metals. The kinematic viscosity data have been obtained for 95°C+ TBP fractions for a wide range of temperature up to 200°C.

ISSN:0884-3759    

DOI:10.1080/08843758908962238

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

A method is described for fractionation of crude oil using carbon dioxide near critical fluid conditions. The number average molecular weight of the fractions of the extracted hydrocarbons from crude oils differed markedly from those original oil. At 308.15K as the pressure increased from 96 bar to 115bar the molecular weights of the fractions increased from 210 to 414 g.mol.

ISSN:0884-3759    

DOI:10.1080/08843758908962239

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

ISSN:0884-3759    

DOI:10.1080/08843758908962240

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor