Thermal cleavage of chemical bonds in selected coal-related structures

Benjamin, Ben M.; Raaen, Vernon F.; Maupin, Paul H.; Brown, Lloyd L.; Collins, Clair J.

doi:10.1016/0016-2361(78)90003-0

Cited by 111 publications

(43 citation statements)

References 6 publications

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“…15) (Mayo et ai, 1978;Whitehurst, 1978;Vernon, 1980;Poutsma, 1980;Carson and Ignasiak, 1980;Benjamin et al, 1978;McMillen et α/, 1981). Hence, the rate of splitting of diarylethanes, dibenzyl ether, etc.…”

Section: Ether and Diarylethane Linkagesmentioning

confidence: 99%

An Essay on the Organic Geochemistry of Coal

Given¹

1984

Coal Science

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Section: Ether and Diarylethane Linkagesmentioning

confidence: 99%

An Essay on the Organic Geochemistry of Coal

Given¹

1984

Coal Science

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“…It is further assumed that the distribution of the products of instantaneous coal dissolution is unaffected by the reaction conditions. This is justified on the basis that only the weaker bonds break during the dissolution of coal (Benjamin et al, 1978;Vernon, 1980) and the number of such bonds, per unit mass of moisture free (mf) coal, depends mainly on the structure of the coal. The latter is considered to be uniform for a particular type of coal and, therefore, the mass of a component produced by the dissolution of unit mass of coal is taken to be constant.…”

Section: Reaction Pathwaysmentioning

confidence: 99%

Liquefaction of coal by SRC‐II process: Part I: A new kinetic model

Singh¹,

Shah

Carr³

et al. 1982

Can J Chem Eng

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The kinetic experiments were carried out in a continuous stirred tank reactor. Practically important ranges of SRC‐II reactor temperature (444–466°C), pressure (10.4–20.8 MPa), nominal slurry residence time (0.54–1.62 h), coal concentration in the feed slurry (25–35 wt%), and inorganic mineral matter concentration (4.75–13.43 wt%) were covered in a total of 43 experimental runs. In each of the experimental runs, the feed slurry was formulated by using vacuum tower bottoms from SRC‐II pilot plants using the same feed coal (Powhatan No. 5), to obtain feed compositions similar to those obtained in SRC‐II pilot‐plant recycle operation. The kinetic model considers the overall conversion to be achieved in two stages. The first stage is the instantaneous dissolution of coal and in the rate controlled second stage all the reactive organic components in the liquid phase are initially assumed to react, each yielding components lighter than itself. The distribution of products in each reaction stage is considered to be independent of the operating conditions. The best rate controlled (second stage) reaction scheme and values of the unknown parameters are obtained by minimizing the overall difference (i.e. for all the components over all the runs) between the measured and model predicted mass fractions of the various components in the reactor. This analysis identifies the reaction of solvent refined coal (pyridine soluble organic matter boiling above 482°C) to be the only significant reaction in the second stage and its rate is determined to be ‐rSRC = 1.567 × 105 exp (‐79.16/RT) · p0.28 H 2 · XASH, kg/L h. Overall error in this analysis yielding the reaction scheme, rSRC and values of product distribution coefficients for both the reaction stages is less than 8% absolute i.e. ±4%.

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“…These materials have high thermal stabilities because their aromatic moieties are bridged in three dimensions by methylene, ether, and carbonyl bonds. 13,14 …”

Section: Introductionmentioning

confidence: 98%

Decomposition reactions of epoxy resin and polyetheretherketone resin in sub- and supercritical water

Tagaya

Shibasaki

Kato

et al. 2004

Journal of Material Cycles and Waste Management

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Epoxy resin and polyetheretherketone (PEEK) resin were decomposed into their monomers such as phenol, cresols, and their analogues by thermal treatment in sub-and supercritical water in a 10-ml tubing bomb reactor. The addition of basic compounds such as Na 2 CO 3 was effective in promoting the decomposition reaction of the resins. In the reaction of epoxy resin, the yield of identified products reached 10% for the reaction at 703 K over 1 h. In the reaction of PEEK resin, the total yield of phenol and dibenzofuran reached 88% for the reaction at 703 K over 3 h. Chemical participation of water in the decomposition reaction was confirmed by the reaction of dinaphthylether.

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Thermal cleavage of chemical bonds in selected coal-related structures

Cited by 111 publications

References 6 publications

An Essay on the Organic Geochemistry of Coal

An Essay on the Organic Geochemistry of Coal

Liquefaction of coal by SRC‐II process: Part I: A new kinetic model

Decomposition reactions of epoxy resin and polyetheretherketone resin in sub- and supercritical water

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