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04642 Structural studies of coal macerals
01
Solid fuels (sources, winning, properties)
New mining radar system 96104629 Queensland Government Mining J., Jun. 1996, 97, p. 23. Describes a new eround Penetration radar svstem with the ootential to earn millions of dollars for Australian mining and engineehng companies, which has been developed by the University of Queensland. I
Oxldatlon level of coals from the reglon of Mramor 96104631 village - Sofia Basin Markova. K. and Kortenski. J. God. Sofii. Univ. ‘Sv. Kliment Okhridski’. Geol.-Gebgr. Fak., 1995, i7, (l), 125-155. (In Bulgarian) Discusses a study of the elemental composition, O-containing functional groups, and oxidation level of the coals from he region of Mramor village. The zones of accelerated oxidation and some aspects of genesis of intertinite are also discussed. Petrographic characterlzatlon and evolution of the 96104632 Permian coal deposits of the Rajmahal basin, Blhar, lndla Singh, M. P. and Singh, P. K. Inr. J. Coal Geol., 1996, 29, (l), 93-118. Pillar coal samples from the working coal seams of Hura and Chuperbhita coalfields (Rajmahal Basin, India), collected and subjected to a detailed petrographic and geochemical study, are rich in liptinite and inertinite and range from subbituminous to high-volatile bituminous B or C in rank. 96104633 Petrological and organic geochemlcal Investlgatlon of recent peats with known envlronments of deposltlon Dehmer, J. fnt. J. Coal Geol., 1995, 28, (2), 111-137. A series of recent peat samples from tropical, sub-tro ical and temperate locations were investigated using coal petrological an B orgamc geochemical techniques. Maceral and biomarker compositions were examined to see if thev corielated or divereed from the know’n environment of deoosition of the pkats. The proportionof humotelinite was related to the \;ater depth and the frequency of dry periods. The pH and trophic level have a modifying influence on the preservation of tissues. 96104634 Petrology and organic geochemistry of selected samples of the llgnltes from Alo Malor (Portugal) Flares. D. and Pickel. W. Coal Sci. Techtlol.. 1995. 1. 275-278. According to the petrographic and geochemicil data,~ thk coals of the Rio Maior Basin were deposited in an inundated marsh to partly forest swamp environment. This coincides with the maceral composition with the high mineral matter content and the high degree of bacterial activity as well as with the variety of terrestrial plant matter input and occasionally algae. 96104635 The petrology of reslnlte In American coals Crelling, J. C. ACS Symp. Ser., 1995, (617), 218-233. Discusses resinite macerals which are ubiquitous, though minor, components in most American coals below medium-volatile bituminous rank. They are usually absent in coals of higher rank. Although resinite macerals usually make ;p less than 3% of n&t U.S. coals, &ey are particularly abundant in coal of the Wasarch Plateau in Utah where they can account for as much as 15% of the macerals present. Resinite macerals have two common modes of occurrence. 96/04636 The properties of Japanese coals and Its relation with degradlnlte Suzuki, P. and Fujii, K. Coal Sci. Technol., 1995, 1, 271-274. Presents the results of petrographic and chemical analysis of Japanese coals. The degradinite had similar properties lo those of rhe exinite group. 96/04637 RelationshIp between the methane sorptlon capacity of the coal and gas pressure Ceglarska-Stefanska, G. and Brzoska, K. Arch. Mire. Sci., 1995, 40, (2), 211-219. The relationship between the methane sorption capacity for coals and high ranks of metamorphism are discussed. The decrease of sorption capacity of ‘wet’ coals was not accompanied by decrease of sorprion deformation in the methane sorption process. 96104636 Report on the actlvltles of the International mlttee for Coal and Organic Petrology durlng the perlod 1.__R11.5 Davis, A. Fuel, Jul. 1996, 75, (9), 1151-1152
Com1991-
96104639 Safer and cheaper drllllng development Queensland Coal Awtralia, Jun. 1996, 3, (l), p. 19. A short report on a new drilling system being developed by the Co-operative Research Centre for Mining Technology in Brisbane, which has the potential lo halve drilling costs and improve the safety of coal mines.
Fuel and Energy
Some observations regarding the potential of tropical peat deposits on the composltlon
effects of coal
I
1
Optlcal propertles of SCT extractlon residues 96104630 obtalned from Turkish coals Vayisoglu, E. S. et al., Coal Sci Technol., 1995, 24, (2), 1459-1462. A high-volatile bituminous and a subbituminous coal (Turkey) were supercritically extracted with toluene at 400°C And 100 atmosphere. Optical reflectance of solid residues were also measured. The disappearance of liptinites is a feature of the optical texture of coals subjected to supercritical toluene.
332
96104640 ;f&mlng
Abstracts
September
1996
Cohen, A. D. and Stack, E. M. Inl. J. Coal Geol., 1996, 29, (I), 39-65. Discusses the origin and composition of coal beds in relation to domed and planar peat depoiits in tropical and subtropical settings. Structural elucldatlon of Argonne premlum coals: 96104641 Molecular weights, heteroatom dlstrlbutlon and llnkages between clusters Winans, R. E. el al., Coal’& Technol., 1995, 1, 87-90. Desorption high-resolution mass spectrometry was used to characterize the heteroatom distribution in heteroatom clusters, cluster molecular weight and the linkages between clusters in several coals of different rank. Heteroatom data were sorted into three categories: (1) containing only oxygen, (2) containing at least one sulphur, and (3) containing at least one nitrogen. For oxygen functionalized molecules, cluster size increased smoothly with increasing rank. Low-rank coals contained 20-30% of oxygen in ethers or furans, with small amounts as carboxylic acids &d arylhydroxy compounds. Structural studies of coal macerals 96104642 Li, I;. et al., Coal Sci. Technol., 1995, 1, 243-246. The paper discusses the macromolecular structure of macerals such as vitrinite, liptinite, and fusinite of a bituminous coal of Pingshou, Shanxi, China. Structural studies on llllnols No. 6 coal through 96104643 qulnollne extractlon Murata, S. er al., Energy Fuels, 1996, 10, (l), 220-224. Extraction of two subbituminous and four bituminous coals with quinoline at 350” and 4.9 MPa N, pressure resulted in 65-90 wt% yield of qbinolinesoluble (QS) material. Only the extract from Illinois No. 6 coal was completely soluble in more conventional solvents. The comparison of the structural features of the QS fraction with that of the original coal suggested that bond cleavage reactions occurred during extraction, which seems to be partly responsible for solubilization in quinoline. Study of sulfur and nltrogen forms In two hlgh96104644 sulfur coals Zhu, Z. et al., Huunjblg Huaxue, 1995, 14, (6), 483-488. (In Chinese) The chemical forms of sulphur and nitrogen in Chinese Guiding coal and Spanish Mequinenza coal were studied using XPS combined with sulphur K-edge XANES and Mossbauer spectroscopy, with special emphasis on the sulphur forms in Guiding coal. A study
of sulfur
and nitrogen
In two hlgh sulfur
Zhu, Z. el al., Coal Sci. Techtrol., 1995, 24, (2), 1681-1684. XPS and XANES analysis was used lo give information on sulphur and nitrogen forms in Meqbinenza (Spanish)-brown coal (13.6 wt.% total S) and Guiding (Chines) bituminous coal. For the Spanish coal pyrrolic N was the most abundant form, followed by pyridinic nitrogen, in contrast to a high level of N-oxide type of N and a lower level of pyrrolic and pyridinic N for the Chinese coal. Surface thermodynamics for hydrocarbons on 96104646 Wyodak coals Glass, A. S. and Stevenson, D. S. Etrergy, Fuels, 1996, 10, (3), 797-805. Isosteric adsorption enthalpies and dispersive surface tensions have been measured for hydrocarbons interacting with Wyodak coal surfaces. The results show that this coal’s intermolecular forces are complex. and coal assessment: Thermal analysis 96104647 vlew with new developments Warne, S. Thermochim. Acla, 1996, (272), l-9. A review of thermal analysis methods in coal assessmenl.
An over-
96104646 Trace element dlstrlbutlons and assoclatlons In UK coals Bushell, A. J. and Williamson, J. Coal Sci. Techrtol., 1995, 1, 167-170. Many trace elements in 5 UK bituminous coals (Kellingley, Longannet, Daw Mill, Thoresby, and Nadins) were associated with coal minerals (and, thus, in concentrations related lo the coal ash content). Elements that were in concentrations not related to the ash content in the coal were As, Ba, La, Sr, and Zn. The elements strongly associated with coal macerals were Be, Sr, and V. Transformatlon In organic sulfur speclatlon during 96104649 maturation of Monterey shale: -constraIn& irom laboratory experiments Nelson, B. C. er al., ACS Symp. Ser., 1995, (612), 138-166. Describes a series of hydrous pyrolysis experiment which were conducted at temperatures ranging from 125 to 360” and 350 bars fo examine variations in sulphur speciation during thermal maturation of Monterey shale.
Solid fuels (sources, winning, properties)
New mining radar system 96104629 Queensland Government Mining J., Jun. 1996, 97, p. 23. Describes a new eround Penetration radar svstem with the ootential to earn millions of dollars for Australian mining and engineehng companies, which has been developed by the University of Queensland. I
Oxldatlon level of coals from the reglon of Mramor 96104631 village - Sofia Basin Markova. K. and Kortenski. J. God. Sofii. Univ. ‘Sv. Kliment Okhridski’. Geol.-Gebgr. Fak., 1995, i7, (l), 125-155. (In Bulgarian) Discusses a study of the elemental composition, O-containing functional groups, and oxidation level of the coals from he region of Mramor village. The zones of accelerated oxidation and some aspects of genesis of intertinite are also discussed. Petrographic characterlzatlon and evolution of the 96104632 Permian coal deposits of the Rajmahal basin, Blhar, lndla Singh, M. P. and Singh, P. K. Inr. J. Coal Geol., 1996, 29, (l), 93-118. Pillar coal samples from the working coal seams of Hura and Chuperbhita coalfields (Rajmahal Basin, India), collected and subjected to a detailed petrographic and geochemical study, are rich in liptinite and inertinite and range from subbituminous to high-volatile bituminous B or C in rank. 96104633 Petrological and organic geochemlcal Investlgatlon of recent peats with known envlronments of deposltlon Dehmer, J. fnt. J. Coal Geol., 1995, 28, (2), 111-137. A series of recent peat samples from tropical, sub-tro ical and temperate locations were investigated using coal petrological an B orgamc geochemical techniques. Maceral and biomarker compositions were examined to see if thev corielated or divereed from the know’n environment of deoosition of the pkats. The proportionof humotelinite was related to the \;ater depth and the frequency of dry periods. The pH and trophic level have a modifying influence on the preservation of tissues. 96104634 Petrology and organic geochemistry of selected samples of the llgnltes from Alo Malor (Portugal) Flares. D. and Pickel. W. Coal Sci. Techtlol.. 1995. 1. 275-278. According to the petrographic and geochemicil data,~ thk coals of the Rio Maior Basin were deposited in an inundated marsh to partly forest swamp environment. This coincides with the maceral composition with the high mineral matter content and the high degree of bacterial activity as well as with the variety of terrestrial plant matter input and occasionally algae. 96104635 The petrology of reslnlte In American coals Crelling, J. C. ACS Symp. Ser., 1995, (617), 218-233. Discusses resinite macerals which are ubiquitous, though minor, components in most American coals below medium-volatile bituminous rank. They are usually absent in coals of higher rank. Although resinite macerals usually make ;p less than 3% of n&t U.S. coals, &ey are particularly abundant in coal of the Wasarch Plateau in Utah where they can account for as much as 15% of the macerals present. Resinite macerals have two common modes of occurrence. 96/04636 The properties of Japanese coals and Its relation with degradlnlte Suzuki, P. and Fujii, K. Coal Sci. Technol., 1995, 1, 271-274. Presents the results of petrographic and chemical analysis of Japanese coals. The degradinite had similar properties lo those of rhe exinite group. 96/04637 RelationshIp between the methane sorptlon capacity of the coal and gas pressure Ceglarska-Stefanska, G. and Brzoska, K. Arch. Mire. Sci., 1995, 40, (2), 211-219. The relationship between the methane sorption capacity for coals and high ranks of metamorphism are discussed. The decrease of sorption capacity of ‘wet’ coals was not accompanied by decrease of sorprion deformation in the methane sorption process. 96104636 Report on the actlvltles of the International mlttee for Coal and Organic Petrology durlng the perlod 1.__R11.5 Davis, A. Fuel, Jul. 1996, 75, (9), 1151-1152
Com1991-
96104639 Safer and cheaper drllllng development Queensland Coal Awtralia, Jun. 1996, 3, (l), p. 19. A short report on a new drilling system being developed by the Co-operative Research Centre for Mining Technology in Brisbane, which has the potential lo halve drilling costs and improve the safety of coal mines.
Fuel and Energy
Some observations regarding the potential of tropical peat deposits on the composltlon
effects of coal
I
1
Optlcal propertles of SCT extractlon residues 96104630 obtalned from Turkish coals Vayisoglu, E. S. et al., Coal Sci Technol., 1995, 24, (2), 1459-1462. A high-volatile bituminous and a subbituminous coal (Turkey) were supercritically extracted with toluene at 400°C And 100 atmosphere. Optical reflectance of solid residues were also measured. The disappearance of liptinites is a feature of the optical texture of coals subjected to supercritical toluene.
332
96104640 ;f&mlng
Abstracts
September
1996
Cohen, A. D. and Stack, E. M. Inl. J. Coal Geol., 1996, 29, (I), 39-65. Discusses the origin and composition of coal beds in relation to domed and planar peat depoiits in tropical and subtropical settings. Structural elucldatlon of Argonne premlum coals: 96104641 Molecular weights, heteroatom dlstrlbutlon and llnkages between clusters Winans, R. E. el al., Coal’& Technol., 1995, 1, 87-90. Desorption high-resolution mass spectrometry was used to characterize the heteroatom distribution in heteroatom clusters, cluster molecular weight and the linkages between clusters in several coals of different rank. Heteroatom data were sorted into three categories: (1) containing only oxygen, (2) containing at least one sulphur, and (3) containing at least one nitrogen. For oxygen functionalized molecules, cluster size increased smoothly with increasing rank. Low-rank coals contained 20-30% of oxygen in ethers or furans, with small amounts as carboxylic acids &d arylhydroxy compounds. Structural studies of coal macerals 96104642 Li, I;. et al., Coal Sci. Technol., 1995, 1, 243-246. The paper discusses the macromolecular structure of macerals such as vitrinite, liptinite, and fusinite of a bituminous coal of Pingshou, Shanxi, China. Structural studies on llllnols No. 6 coal through 96104643 qulnollne extractlon Murata, S. er al., Energy Fuels, 1996, 10, (l), 220-224. Extraction of two subbituminous and four bituminous coals with quinoline at 350” and 4.9 MPa N, pressure resulted in 65-90 wt% yield of qbinolinesoluble (QS) material. Only the extract from Illinois No. 6 coal was completely soluble in more conventional solvents. The comparison of the structural features of the QS fraction with that of the original coal suggested that bond cleavage reactions occurred during extraction, which seems to be partly responsible for solubilization in quinoline. Study of sulfur and nltrogen forms In two hlgh96104644 sulfur coals Zhu, Z. et al., Huunjblg Huaxue, 1995, 14, (6), 483-488. (In Chinese) The chemical forms of sulphur and nitrogen in Chinese Guiding coal and Spanish Mequinenza coal were studied using XPS combined with sulphur K-edge XANES and Mossbauer spectroscopy, with special emphasis on the sulphur forms in Guiding coal. A study
of sulfur
and nitrogen
In two hlgh sulfur
Zhu, Z. el al., Coal Sci. Techtrol., 1995, 24, (2), 1681-1684. XPS and XANES analysis was used lo give information on sulphur and nitrogen forms in Meqbinenza (Spanish)-brown coal (13.6 wt.% total S) and Guiding (Chines) bituminous coal. For the Spanish coal pyrrolic N was the most abundant form, followed by pyridinic nitrogen, in contrast to a high level of N-oxide type of N and a lower level of pyrrolic and pyridinic N for the Chinese coal. Surface thermodynamics for hydrocarbons on 96104646 Wyodak coals Glass, A. S. and Stevenson, D. S. Etrergy, Fuels, 1996, 10, (3), 797-805. Isosteric adsorption enthalpies and dispersive surface tensions have been measured for hydrocarbons interacting with Wyodak coal surfaces. The results show that this coal’s intermolecular forces are complex. and coal assessment: Thermal analysis 96104647 vlew with new developments Warne, S. Thermochim. Acla, 1996, (272), l-9. A review of thermal analysis methods in coal assessmenl.
An over-
96104646 Trace element dlstrlbutlons and assoclatlons In UK coals Bushell, A. J. and Williamson, J. Coal Sci. Techrtol., 1995, 1, 167-170. Many trace elements in 5 UK bituminous coals (Kellingley, Longannet, Daw Mill, Thoresby, and Nadins) were associated with coal minerals (and, thus, in concentrations related lo the coal ash content). Elements that were in concentrations not related to the ash content in the coal were As, Ba, La, Sr, and Zn. The elements strongly associated with coal macerals were Be, Sr, and V. Transformatlon In organic sulfur speclatlon during 96104649 maturation of Monterey shale: -constraIn& irom laboratory experiments Nelson, B. C. er al., ACS Symp. Ser., 1995, (612), 138-166. Describes a series of hydrous pyrolysis experiment which were conducted at temperatures ranging from 125 to 360” and 350 bars fo examine variations in sulphur speciation during thermal maturation of Monterey shale.