摘要:

A coal-derived naphtha was hydrotreated at a range of severities in a bench-scale reactor using a commercial Co-Mo/Al203 catalyst. Total sulphur and nitrogen contents were monitored as were the phenolic components. The phenolics represented most of the oxygen contribution. Very severe operating conditions were required for removal of these heteroatoms. Ihe relative rate of heteroatom removal at 10.45 MPa and space velocity less than 1.25 x 10-3 g feed per gram catalyst second was found to be:

ISSN:0884-3759    

DOI:10.1080/08843758608915806

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

The number average molecular weight (Mn¯) of two Iraqi asphalts has been studied before end after thermal treatment using vapour pressure osmometery. Changes in Mn¯ values after thermal aging were compared with the changes in their physical and mechanical properties. Toluene, benzene, cyclohexane, tetrahydrofuran and carbon tetrachloride were used to fractionate the asphalts The Mn¯ of each fraction was determined before and after aging.

ISSN:0884-3759    

DOI:10.1080/08843758608915807

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

A laboratory coking unit was designed and constructed for an experimental study of the delayed coking process of hydrotreated Kirkuk reduced crude. The yield and analysis of coke, gases and liquid products were obtained for each experiment. The gas < C4. and gasoline yield decrease by increasing Liquid hourly space velocity (LHSV) while the yields of kerosene and gas oil increase and no effect of LHSV on petroleum coke yield was observed, The specific gravity of gasoline, kerosene and gas oil decreases by increasing LHSV. The increase in LHSV (decrease in residence time) decreases the olefinic hydrocarbons of produced gas oil and fraction 350-450°C. Sulfur content of produced coke and coking residue increases by increasing residence time while it changes slightly for kerosene and gas oil. By increasing the recycle ratio (RR), the yield of gas decreases while the coke yield increases. Sulfur content of gas oil and coking residue increases with an increase in the recycle ratio while it decreases for coke. Metals content of coke decreases with an increase in the recycle ratio and coke with accepted properties for aluminum anode manufacture could be produced when a recycle ratio of 1.4 was used.

ISSN:0884-3759    

DOI:10.1080/08843758608915808

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

Characterization of Arab medium Crude Oil, has been carried out in terms of API gravity, debutanized crude gravity, total sulfur content, Reid vapour pressure ash content, heating value, salt content, viscosity SUS, vanadium content as V2O5, pour point and analysis of various metals. Further, six true boiling point (TBP) fractions (IBP-95°C, 95-205°C, 205-260°C, 260-345°C, 345-455°C and 455°C+) of this crude were characterized in terms of API gravity, total sulfur contents H2S content, mercaptons content, molecular weight, elemental analyse; for total carbon, hydrogen and nitrogen, analyses of various metals and paraffin, aromatic and naphthene contents of lighter fractions. The kinematic viscosity-temperature data have been obtained for 95°C+ TBP fractions for a wide range of temperatures.

ISSN:0884-3759    

DOI:10.1080/08843758608915809

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

Several commercial catalysts were tested for their activity for upgrading waste lubricating oils. The feedstock was vacuum distilled to remove the light and the heavy ends. Two trickle-bed reactors placed in series were employed, the top reactor contained a high surface area alumina and the bottom reactor the catalyst. A Ni-Mo-AI2O3catalyst was selected for further study on the basis of its higner activity and activity maintenance. Several different hydrogen pressures, reactor temperatures, and liquid volume hourly space velocities were employed to arrive at the most optimum process conditions. This paper will discuss the effect of catalyst and process conditions on the product liquid color, viscosity, nitrogen, and sulfur content.

ISSN:0884-3759    

DOI:10.1080/08843758608915810

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

Metal chelating additives at 1% w/w do not prevent gum precipitation and/or viscosity increases in coal-derived distillate fuels stored in air at 50°C. However, distillates containing 10-15% w/w of added cyclohexanol, dipropylamine, ethylmethylketone or iso-propanol do not precipitate gum or increase in viscosity under simulated storage conditions. Data for cyclohexanol/fuel mixtures suggest that gum formation is inhibited by hydrogen-bonding between cyclohexanol and fuel constituents.

ISSN:0884-3759    

DOI:10.1080/08843758608915811

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor