- Email: [email protected]
Sulfur during early diagenesis in Sphagnum peat: Insights from delta 34S ratio profiles in 210Pb-dated peat cores
01 95/02291
Preparation
Presents preliminary results of the coal structure study b scanning tunnelling microscopy and atom force microscopy. Graphitize B, semi-graphitized and anthracite coals were used in the study.
sua air
Stud of coal rtructure using STM and AFM Yang, Q. er al., C xin. Sci. Bull., 1994, 39, (ll), 941-944.
95IQ2292 Study on the structure of fulvlc acid from weathgrd coal using modified sodlum dlchromatr oxidation and GCZhou, X. et al., Fuel Sci. Tech&. Int., 1994, 12, ll), 14951508. Fulvic acid extracted from a weathered coal was met6 ylated and then oxidatively degraded with sodium dichromate in water at 210”. The degradation products isolated from the aqueous solution were analyzed using capillary gas chromatography-mass spectroscopy after esterification.
Sulfur characterization llthotypes and macerals
95102293
of Polish coals, their
Grvalewicz. G. et al.. FueL Mar. 1995. 74, (3). 349-355. T&e coalb of different ra& &=0.5&l.dlky and the lithotypes and mace& seoarated from these coals. were analvsed in this studv. The wet chemical te’chnique was used to determine tie distribution 01 sulphate, pyritic and organic sulphur forms in the coals and lithotypes. The morphology, size and mode of occurrence of pyrite were examined by optical microscopy and scanning electron microscopy with energy dispersive Xray analysis. An oxidative technique was developed to study the organically bound sulphur in the maceral microsamples. Pyritic and organic sulphur accounted for nearly all the sulphur in the coals examined and their lithotypes. In comparison with the coals, the lithotypes had a higher proportion of very fine pyrite. Pyrite was most sbundant in fusain.
Sulfur during early dlagrnesls In Sphagnum peat: Insights from delta 34s ratio profiles In “oPb-dated peat cores Novak, M. et al., Limnol. Oceanogr., 1994, 39, (5), 1172-1185. 95102294
Sulfur speclatlon of desulfurlzed coals by XANES spectroscopy 95102295
Huffman, G. P. et a!., Fuel, Apr. 1995, 74, (4), 549-555. Least square analysis of the X-ray absorption near edge structures XANES) region of sulphur K edge X-ray absorption fine structure XAFS) spectra can provide a quantitative analysis of both the organic and inorganic functional forms of sulphur in coal. In the current article, this method is applied to speciation -of the sulphur forms in a number of desulphurized coals. The samples investigated include biologically desulphurized coals, samples subjected to selective chemical reactions, samples subjected to molten caustic leaching and specimens treated with boiling oerchloroethylene. In all cases, analysis of XANES provides a reasoriatily quantitative speciation of the ch-anges in the suldhur forms resulting from the various treatments.
Thermal propertles of Bangladesh1 coal-peats found In Baghla Beel of Farldpur dlstrlct
95iQ2296
Hossain, T. et al., Bangladesh J. Sci. Ind. Res., 1994, 29, (l), 130-135. The DTA of Bangladeshi peat found in Baghia Bee1 of Faridpur district was carried out and an attempt has been made to correlate the thermal properties of the peats with their electrical properties that had been previously studied. 95lQ2297
Vltrlnlte reflectance and molecular geochemist of Jurassic sedlments: The influence of heating by Tertiary dlu es (northwest Scotland)
Bishou. A. N. and Abbott. G. D. Or. Geochem.. 1995,22, (I), 165-177. Vitriniie reflectance mea&rements from sedimen&ry rocks adjacent to six dikes from sites across the Inner Hebrides indicate that the lateral extent of thermal alteration is reasonably similar and proportional to dike thickness with alteration starting to take effect at 70% dike thickness. Detailed samples of a Jurassic siltstone adjacent to a 0.9 m dike reveals that the zone of maximum extractable organic matter (BOM wt/g rock), equivalent to the ‘oil window’, is relatively narrow (ca. 25% of the dike thickness). The position of this ‘oil window’, relative to the vitrinite reflectance profile, is comparable with that from burial maturation.
Vltrlnlte reflectance suppresslon in coal due to a marlne transgression: Case study of the organic geochemistry of the Greta seam, Sydney Basln
95102298
George, S. C. et al., APE.4 J., 1994, 34, 241-255. Discusses the vitrinite reflectance suppression in coal of the Permian Greta seam, northern Sydney Basin. It is suggested that the observed suppression is caused by the more perhydrous nature of vitrinite in marine-influence coals. 95102299
Wiomln,‘, Powder River Basln - Geology and geography of t e not on s largest coal field
Glass, G. The paper field. To beds, co s
B. Min. Eng. (Littleton, Colo.), 1994, 46, (8), 955-959. describes the geology and geography of the Powder River coal its discussed include: coal-bearing rocks and important coal characteristics, and coal resources and production.
95/02300
Solid fuels (preparation)
Activation of anthracite: Using carbon dioxide ver-
Bessant, G. A. and Walker, P. L. Carbon, 1994, 32, (6), 1171-1176. Devolatilized (950°C) anthracite was activated in 0.1 MPa CO, at 950°C and 0.1 MPa aK at 425°C and 450°C. At comparable gasification rates and carbon bum-offs in CO, and air, larger surface areas and pore volumes were developed by activation in CO,. This is attributed foremost to less uniform activation through the anthracite particles when gasification takes place in air. Also, the formation of a stable oxygen complex, concurrent with carbon gasification in air, may reduce the efficiency of anthracite activation.
95lQ2301 The adsorption behavior of nonionlc reagents on two low rank Brltlsh coals
Aktas,2. and Woodbum, E. T. Miner. Eng., 1994, 7, (9), 1115-1126. The adsorption of the nonionic reagents on the fine coal fractions is studied as it relates to froth flotation. 95lQ2302 Rubinshtein, Russian) Discusses the processes for
Beneflclatlon of ultrafine coal slurries Y. B. and Nil&in, I. N.
Koks Khim.,
selective coagulation, flocculation, ultrafine coal beneficiation.
1994, (8), 4-8. (In
and flocculation-flotation
Change In the chemical composltlon of humlc 95102303 acids durlng thermolysis of peat Tarnovskaya, L. I. and Maslov, S. G. Mrim. Tverd. Topl. (Moscow), 1994, (4), 33-39. (In Russian)
Chemically enhanced flltratlon and dewaterlng of narrow-sized coal particles
95lQ2304
Sugn. D. J. and Turian, R. M. SeD. Technol., 1994, 4. (3). 130-143. An-experimental study’of the filtration and dewate& of’fine coal with and without additives was carried out in a vacuum filtration cell. with variables including the driving force, solids concentration, filter area,‘particle size, and slurry pH. The effects of several flocculants, surfactants, and hydrophobizing additives on final moisture content of the filter cakes were determined. Investigations included determination of the rates of filteration and dewatering, assessment of the effects of additive type, and establishment of optimum dosage of additives
Coal chemical changes and Its processing charac95lO2305 terlstlcs in solvent reflnlng processes Wang, Y. et al., Mei Huagong, 1994, (1 l-5. (In Chinese) The paper discusses
coal solvent refimng
I?lquefaction.
Coal properties dictate coal flotatlon strategles 95102306 Aplan, F. F. Trans. Sot. Min. Metall. Explor., 1994, 294, 83-96. Discusses coal flotation, especially on the effect of coal properties on the process. Coke-oven byproduct modifications at Natlonal Steel’s Great Lakes Div. _.
95lO2307
Kalinowskv. R. P. and Platts. M. iron Steel Ena.. 1994. 71. (10). 13-17. The authors describe the renovation of a bypro&cts plant, and coal and coke handling systems in the coke-oven battery facility at National Steel’s Great Lakes Division.
Dewaterlng of fine coal uslng supsrabsorbents 95/02306 Publ. Australas. Inst. Min. Metall, 1994 AUSIMM Dzinomwa, G. P. Studen Co& 1994, 133-141. The author describes the development of a novel method of reducing moisture content of fine coal cakes from conventional filters to a level comparable to that achieved by thermal drying. 95tO2309
Effect of atomic (OC) ratio and hellum denslty on mlcrowave desulfurlzatlon efficlencles and correlations for thelr predlctlons
Singh, K. P. and Kakati, M. C. Rex Ind., 1994, 39, (3), 198-201. Discusses the correlation of sulphate, pyritic, organic and total sulphur removal in coal microwave desulphurization vs atmospheric O/C ratio and helium density of coal.
The effect of coal cleaning on trace element concentrations
9510237 0
Rosendale, L. W. et al., Proc. Annual Meeting Air Waste Management Assoc., 93MPS.01, 16 pp. Run-of-mine coals and-conventionally cleaned coals were analyzed for trace elements (Sb. As. Be. Cd, Cr. Co, Pb, Mn, Hn, Ni, and Se); most of the analyses w&e conductecl by inducti~ely~cou$e&~las~a ma& spectroscopy, except for Hg and Se, which were analyzed by the double gold amalgam method and hydropyrolysis, respectively.
Fuel and Energy Abstracts May 7995
773
Preparation
Presents preliminary results of the coal structure study b scanning tunnelling microscopy and atom force microscopy. Graphitize B, semi-graphitized and anthracite coals were used in the study.
sua air
Stud of coal rtructure using STM and AFM Yang, Q. er al., C xin. Sci. Bull., 1994, 39, (ll), 941-944.
95IQ2292 Study on the structure of fulvlc acid from weathgrd coal using modified sodlum dlchromatr oxidation and GCZhou, X. et al., Fuel Sci. Tech&. Int., 1994, 12, ll), 14951508. Fulvic acid extracted from a weathered coal was met6 ylated and then oxidatively degraded with sodium dichromate in water at 210”. The degradation products isolated from the aqueous solution were analyzed using capillary gas chromatography-mass spectroscopy after esterification.
Sulfur characterization llthotypes and macerals
95102293
of Polish coals, their
Grvalewicz. G. et al.. FueL Mar. 1995. 74, (3). 349-355. T&e coalb of different ra& &=0.5&l.dlky and the lithotypes and mace& seoarated from these coals. were analvsed in this studv. The wet chemical te’chnique was used to determine tie distribution 01 sulphate, pyritic and organic sulphur forms in the coals and lithotypes. The morphology, size and mode of occurrence of pyrite were examined by optical microscopy and scanning electron microscopy with energy dispersive Xray analysis. An oxidative technique was developed to study the organically bound sulphur in the maceral microsamples. Pyritic and organic sulphur accounted for nearly all the sulphur in the coals examined and their lithotypes. In comparison with the coals, the lithotypes had a higher proportion of very fine pyrite. Pyrite was most sbundant in fusain.
Sulfur during early dlagrnesls In Sphagnum peat: Insights from delta 34s ratio profiles In “oPb-dated peat cores Novak, M. et al., Limnol. Oceanogr., 1994, 39, (5), 1172-1185. 95102294
Sulfur speclatlon of desulfurlzed coals by XANES spectroscopy 95102295
Huffman, G. P. et a!., Fuel, Apr. 1995, 74, (4), 549-555. Least square analysis of the X-ray absorption near edge structures XANES) region of sulphur K edge X-ray absorption fine structure XAFS) spectra can provide a quantitative analysis of both the organic and inorganic functional forms of sulphur in coal. In the current article, this method is applied to speciation -of the sulphur forms in a number of desulphurized coals. The samples investigated include biologically desulphurized coals, samples subjected to selective chemical reactions, samples subjected to molten caustic leaching and specimens treated with boiling oerchloroethylene. In all cases, analysis of XANES provides a reasoriatily quantitative speciation of the ch-anges in the suldhur forms resulting from the various treatments.
Thermal propertles of Bangladesh1 coal-peats found In Baghla Beel of Farldpur dlstrlct
95iQ2296
Hossain, T. et al., Bangladesh J. Sci. Ind. Res., 1994, 29, (l), 130-135. The DTA of Bangladeshi peat found in Baghia Bee1 of Faridpur district was carried out and an attempt has been made to correlate the thermal properties of the peats with their electrical properties that had been previously studied. 95lQ2297
Vltrlnlte reflectance and molecular geochemist of Jurassic sedlments: The influence of heating by Tertiary dlu es (northwest Scotland)
Bishou. A. N. and Abbott. G. D. Or. Geochem.. 1995,22, (I), 165-177. Vitriniie reflectance mea&rements from sedimen&ry rocks adjacent to six dikes from sites across the Inner Hebrides indicate that the lateral extent of thermal alteration is reasonably similar and proportional to dike thickness with alteration starting to take effect at 70% dike thickness. Detailed samples of a Jurassic siltstone adjacent to a 0.9 m dike reveals that the zone of maximum extractable organic matter (BOM wt/g rock), equivalent to the ‘oil window’, is relatively narrow (ca. 25% of the dike thickness). The position of this ‘oil window’, relative to the vitrinite reflectance profile, is comparable with that from burial maturation.
Vltrlnlte reflectance suppresslon in coal due to a marlne transgression: Case study of the organic geochemistry of the Greta seam, Sydney Basln
95102298
George, S. C. et al., APE.4 J., 1994, 34, 241-255. Discusses the vitrinite reflectance suppression in coal of the Permian Greta seam, northern Sydney Basin. It is suggested that the observed suppression is caused by the more perhydrous nature of vitrinite in marine-influence coals. 95102299
Wiomln,‘, Powder River Basln - Geology and geography of t e not on s largest coal field
Glass, G. The paper field. To beds, co s
B. Min. Eng. (Littleton, Colo.), 1994, 46, (8), 955-959. describes the geology and geography of the Powder River coal its discussed include: coal-bearing rocks and important coal characteristics, and coal resources and production.
95/02300
Solid fuels (preparation)
Activation of anthracite: Using carbon dioxide ver-
Bessant, G. A. and Walker, P. L. Carbon, 1994, 32, (6), 1171-1176. Devolatilized (950°C) anthracite was activated in 0.1 MPa CO, at 950°C and 0.1 MPa aK at 425°C and 450°C. At comparable gasification rates and carbon bum-offs in CO, and air, larger surface areas and pore volumes were developed by activation in CO,. This is attributed foremost to less uniform activation through the anthracite particles when gasification takes place in air. Also, the formation of a stable oxygen complex, concurrent with carbon gasification in air, may reduce the efficiency of anthracite activation.
95lQ2301 The adsorption behavior of nonionlc reagents on two low rank Brltlsh coals
Aktas,2. and Woodbum, E. T. Miner. Eng., 1994, 7, (9), 1115-1126. The adsorption of the nonionic reagents on the fine coal fractions is studied as it relates to froth flotation. 95lQ2302 Rubinshtein, Russian) Discusses the processes for
Beneflclatlon of ultrafine coal slurries Y. B. and Nil&in, I. N.
Koks Khim.,
selective coagulation, flocculation, ultrafine coal beneficiation.
1994, (8), 4-8. (In
and flocculation-flotation
Change In the chemical composltlon of humlc 95102303 acids durlng thermolysis of peat Tarnovskaya, L. I. and Maslov, S. G. Mrim. Tverd. Topl. (Moscow), 1994, (4), 33-39. (In Russian)
Chemically enhanced flltratlon and dewaterlng of narrow-sized coal particles
95lQ2304
Sugn. D. J. and Turian, R. M. SeD. Technol., 1994, 4. (3). 130-143. An-experimental study’of the filtration and dewate& of’fine coal with and without additives was carried out in a vacuum filtration cell. with variables including the driving force, solids concentration, filter area,‘particle size, and slurry pH. The effects of several flocculants, surfactants, and hydrophobizing additives on final moisture content of the filter cakes were determined. Investigations included determination of the rates of filteration and dewatering, assessment of the effects of additive type, and establishment of optimum dosage of additives
Coal chemical changes and Its processing charac95lO2305 terlstlcs in solvent reflnlng processes Wang, Y. et al., Mei Huagong, 1994, (1 l-5. (In Chinese) The paper discusses
coal solvent refimng
I?lquefaction.
Coal properties dictate coal flotatlon strategles 95102306 Aplan, F. F. Trans. Sot. Min. Metall. Explor., 1994, 294, 83-96. Discusses coal flotation, especially on the effect of coal properties on the process. Coke-oven byproduct modifications at Natlonal Steel’s Great Lakes Div. _.
95lO2307
Kalinowskv. R. P. and Platts. M. iron Steel Ena.. 1994. 71. (10). 13-17. The authors describe the renovation of a bypro&cts plant, and coal and coke handling systems in the coke-oven battery facility at National Steel’s Great Lakes Division.
Dewaterlng of fine coal uslng supsrabsorbents 95/02306 Publ. Australas. Inst. Min. Metall, 1994 AUSIMM Dzinomwa, G. P. Studen Co& 1994, 133-141. The author describes the development of a novel method of reducing moisture content of fine coal cakes from conventional filters to a level comparable to that achieved by thermal drying. 95tO2309
Effect of atomic (OC) ratio and hellum denslty on mlcrowave desulfurlzatlon efficlencles and correlations for thelr predlctlons
Singh, K. P. and Kakati, M. C. Rex Ind., 1994, 39, (3), 198-201. Discusses the correlation of sulphate, pyritic, organic and total sulphur removal in coal microwave desulphurization vs atmospheric O/C ratio and helium density of coal.
The effect of coal cleaning on trace element concentrations
9510237 0
Rosendale, L. W. et al., Proc. Annual Meeting Air Waste Management Assoc., 93MPS.01, 16 pp. Run-of-mine coals and-conventionally cleaned coals were analyzed for trace elements (Sb. As. Be. Cd, Cr. Co, Pb, Mn, Hn, Ni, and Se); most of the analyses w&e conductecl by inducti~ely~cou$e&~las~a ma& spectroscopy, except for Hg and Se, which were analyzed by the double gold amalgam method and hydropyrolysis, respectively.
Fuel and Energy Abstracts May 7995
773