Chromatographic characterization of thermally upgraded products from alternative fuels

Lanças, Fernando Mauro; Vilegas, Janete Harumi Yariwake; Martins, Sérgio Augusto Mezzalira; Gobato, Elaine A. F.

doi:10.1002/jhrc.1240170409

Cited by 9 publications

(4 citation statements)

References 24 publications

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“…The composition of bagasse is similar to that of other lignocellulosic materials, cellulose (40-50%), hemicellulose (20-30%), lignin (20-25%), ash (1.5-3.0%) (Dasgupta et al, 1988;Fraga-Araujo, 1990;Lancas, 1986;Varhegyi et al, 1989). To date, only a fraction of this agricultural waste is productively utilized, being burnt in the furnaces of the sugar cane mills to generate process power and heat (Lancas et al, 1994). Since the heat of combustion of raw bagasse is low, approximately 5.5 kJ/kg (Schuchardt and Matos, 1982), its profligate consumption as a primary fuel may be considered, from an energy viewpoint, to be "wasteful".…”

Section: Introductionmentioning

confidence: 94%

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Pyrolysis of Sugar Cane Bagasse in a Wire-Mesh Reactor

Drummond

1996

Ind. Eng. Chem. Res.

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Improved experimental techniques are described, using a wire mesh reactor, for determining the pyrolysis yields of lignocellulosic materials. In this apparatus pyrolysis tars are rapidly swept from the hot zone of the reactor and quenched, secondary reactions are thereby greatly diminished. Particular emphasis is placed upon the measurement of the pyrolysis yields for sugar cane bagasse, an abundant agricultural waste product. The role of the important pyrolysis parameters, peak temperature and heating rate, in defining the ultimate tar yield is investigated, with the value for bagasse being 54.6% at 500 °C and 1000 °C/s. The pyrolysis yields, under similar conditions, of another biomass material, silver birch, are also reported and compared to those of bagasse.

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Section: Introductionmentioning

confidence: 94%

“…Secondary tar reactions were evident in their experiments; furthermore, the heating rate, and hold time at the peak temperature, could not be controlled in their reactor. Nevertheless, the primary objective of Lancas (1994), the development of separation and classification techniques for pyrolytic tars, was attained.…”

Section: Introductionmentioning

confidence: 99%

Pyrolysis of Sugar Cane Bagasse in a Wire-Mesh Reactor

Drummond

1996

Ind. Eng. Chem. Res.

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“…The liquids that were characterized were from reaction at 350 °C, 1 h, using LCO and Pittsburgh coal in a 10:1 solvent-to-coal ratio. The products were subjected to PLC-8 − to separate them into fractions based on polarity. The solvents used and the types of compounds extracted are shown in Table .…”

Section: Resultsmentioning

confidence: 99%

“…To characterize the material extracted from coal, the original LCO and the coal extract obtained at 350 °C with LCO/coal 10:1 were fractionated using preparative liquid chromatography (PLC). The method used is PLC-8, which permits sample separation into eight discrete fractions with chemical identity well-defined. − This method has been used previously to characterize hydrocarbons produce from coal processing. − …”

Section: Methodsmentioning

confidence: 99%

Solvent Extraction of Bituminous Coals Using Light Cycle Oil: Characterization of Diaromatic Products in Liquids

Griffith¹,

Clifford

Rudnick

et al. 2009

Energy Fuels

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Many studies of the pyrolytic degradation of coal-derived and petroleum-derived aviation fuels have demonstrated that the coal-derived fuels show better thermal stability, both with respect to deposition of carbonaceous solids and cracking to gases. Much previous work at our institute has focused on the use of refined chemical oil (RCO), a distillate from the refining of coal tar, blended with light cycle oil (LCO) from catalytic cracking of vacuum gas oil. Hydroprocessing of this blend forms high concentrations of tetralin and decalin derivatives that confer particularly good thermal stability on the fuel. However, possible supply constraints for RCO make it important to consider alternative ways to produce an "RCO-like" product from coal in an inexpensive process. This study shows the results of coal extraction using LCO as a solvent. At 350 °C at a solvent-to-coal ratio of 10:1, the conversions were 30-50 wt % and extract yields 28-40 wt % when testing five different coals. When using lower LCO/coal ratios, conversions and extract yields were much smaller; lower LCO/coal ratios also caused mechanical issues. LCO is thought to behave similarly to a nonpolar, non-hydrogen donor solvent, which would facilitate heat-induced structural relaxation of the coal followed by solubilization. The main components contributed from the coal to the extract when using Pittsburgh coal are di-and triaromatic compounds.

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Open Tubular Supercritical Fluid Chromatography (ot-SFC) Applied to the Separation of Coal-Derived Products Obtained by Supercritical Fluid Extraction (SFE)

Tavares

Lanças

2000

J. High Resol. Chromatogr.

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Chromatographic characterization of thermally upgraded products from alternative fuels

Cited by 9 publications

References 24 publications

Pyrolysis of Sugar Cane Bagasse in a Wire-Mesh Reactor

Pyrolysis of Sugar Cane Bagasse in a Wire-Mesh Reactor

Solvent Extraction of Bituminous Coals Using Light Cycle Oil: Characterization of Diaromatic Products in Liquids

Open Tubular Supercritical Fluid Chromatography (ot-SFC) Applied to the Separation of Coal-Derived Products Obtained by Supercritical Fluid Extraction (SFE)

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