Characterization of petroleum feedstocks for coal-oil co-processing

Wallace, Stephen C.; Bartle, Keith D.; Burke, Michael P.; Egia, B.; Lu, Stephen C.-Y.; Taylor, N.; Flynn, T. M.; Kemp, W.; Steedman, W.

doi:10.1016/0016-2361(89)90058-6

Cited by 17 publications

(9 citation statements)

References 15 publications

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“…Typical aromaticity values for a non-cracked vacuum residue are: AR(n-heptane asphaltenes) = 0.50, AR(resins) = 0.35, AR(non-polar aromatics) = 0.30 (Takegarni et al, 1980;Wallace et al, 1989). 41 In view of the assumptions 'above, the chemical structure of any fuel molecule is completely characterized by two parameters only: molecular weight and aromaticity.…”

Section: Heavy Fuel Oil Composition Modelmentioning

confidence: 98%

A Mathematical Model for Heavy Fuel Droplet Vaporization and Pyrolysis in a High Temperature Inert Gas

Baert

1993

Combustion Science and Technology

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Section: Heavy Fuel Oil Composition Modelmentioning

confidence: 98%

A Mathematical Model for Heavy Fuel Droplet Vaporization and Pyrolysis in a High Temperature Inert Gas

Baert

1993

Combustion Science and Technology

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“…Table 2 shows that ali of the negative conversions are In light of the discussion about the pyrene-ike behavior of petroleum resids, it is more likely to expect the aromatic part of asphaltenes, and in particular their structure, to have an influence on the interaction between the petroleum resid and coal. It has been reported in the literature that a minimum aromatic proton content of asphaltenes is necessary for significant coal conversion degree [4]. of this resid contains predominantly long chain paraffins.…”

Section: Solvent Fractionation Of Petroleum Residsmentioning

confidence: 99%

Inhibition of retrogressive reactions in coal/petroleum co-processing. Quarterly technical progress report, July 1, 1991--September 30, 1991

Schobert¹,

Tomic²

1991

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“…Coprocessing is a simultaneous reaction of solid fossil fuels, such as coals, plastic wastes, or tire, and heavy oils. − In the hydroconversion of petroleum residues, powdered coal is sometimes used as an additive to prevent coking. Vacuum residue works as a solvent, and coal acts as a catalyst carrier and/or a hydrogen shuttler. − In addition, impurities including transition-metal species in the vacuum residue are concentrated into the coal residue . A number of studies have reported that addition of coal, at a level of 5−33%, to residue feed produced a boost in the distillate yields. − Although the coprocessing is one of the most expected ways for utilization of coals and heavy oils, the use of expensive molecular hydrogen has aggravated its cost.…”

Section: Introductionmentioning

confidence: 99%

Iron-Catalyzed Coprocessing of Coals and Vacuum Residues Using Syngas−Water as a Hydrogen Source

1998

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The effectiveness of alternative hydrogen sources compared to pressurized hydrogen gas toward the coprocessing of coals and vacuum residues was investigated in the presence of different kinds of iron-based catalyst precursors. The reactions in syngas-water using pentacarbonyliron or synthetic pyrite achieved high rates of conversion to THF solubles comparable to those in pressurized hydrogen gas, indicating the presence of the synergistic effects of the two hydrogen sources, hydrogen gas and carbon monoxide-water. Under hydrogen gas, addition of water greatly increased the yields of the desired fractions. The Fe(CO) 5 -catalyzed coprocessing of a vacuum residue of Arabian Heavy and Wandoan coal (2:1, 400 °C, 60 min, H 2 3.0 MPa, CO 3.0 MPa, water 0.5 g) in combination with the pretreatment at lower temperature (200 °C, 30 min) afforded the high yields of THF-soluble (100%) and n-hexane-soluble (69.5%) matter. At higher reaction temperatures, 425-450 °C, the use of Fe(CO) 5 with sulfur or synthetic pyrite afforded much better rates of conversion than Fe(CO) 5 without sulfur. The XRD and XPS analyses revealed the formation of a mixture of magnetite and pyrrhotite from Fe(CO) 5 without sulfur, and the surface of the used catalyst was mainly covered with iron species in a relatively high oxidation state. On the other hand, pyrrhotite was formed from Fe(CO) 5 with sulfur or synthetic pyrite. The gas consumption, eventually the efficiency of the coprocessing, was estimated to be influenced by such changes in the state of the catalyst surface.

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Characterization of petroleum feedstocks for coal-oil co-processing

Cited by 17 publications

References 15 publications

A Mathematical Model for Heavy Fuel Droplet Vaporization and Pyrolysis in a High Temperature Inert Gas

A Mathematical Model for Heavy Fuel Droplet Vaporization and Pyrolysis in a High Temperature Inert Gas

Inhibition of retrogressive reactions in coal/petroleum co-processing. Quarterly technical progress report, July 1, 1991--September 30, 1991

Iron-Catalyzed Coprocessing of Coals and Vacuum Residues Using Syngas−Water as a Hydrogen Source

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