- Email: [email protected]
01146 Enthalpy relaxation and glass transitions in point of Ayr coal (letter)
01
Solid fuels (sotmxw, winning, pttydes)
Tha dlatrlbutlon of In nlo ?? lamonto batwaan 96/01142 T anlta coal and mlnaral mattar In Rumanian Nascu,H. I. et aL, Fuel, Jan. 1995, 74, (l),i19-123. Cotrclations resultin from ash level determinations and X-my fluoresccncc data perform c! on lignite ash samples taken fmm the Campulung coal field, Rumanis, wcrc determined. The. cxistcncc of linear relationships between the concentrations of each analyscd clement: Si, Al, Ca, Fe, S, M Na and K (convcrtcd to oxides), and the ash content (9. basis) f?r ch+Icrent ash lcvcls~has been asccrtamed, arlth standard dcvlatrons, So m to the mean concentration of the oxide in the zal,an 4-)%,nw;h following suitable extrapolation, to estimate the .#z z oxide fractions which correspond to the parts of a given element bound to the coal’s organic and inorganic matter.
Influonca of raalnlta on humlnlta propartlar %lUlSl Suarez-Ruix. I. er al.. Enerpv & F&s. Nov.-Dec. 1994.. 8._ M. .,. 1417-1424. . Vitrain from Terucl (northeastern Spain) constitutes a good example of the influence of liptinitic compounds on propeztics of huminitc. The rcsinixation of the humotclinitic tissue of thii lithotypc has provoked an important suppression of its rcflectancc giving it a strongly perhydrogenated chmcter. Even though it later undergoes a diagcnctic evolution, ncithcr of the conventional rank parameters reflects the real degree of maturation rcached by this vitrain because of the important alteration of its propertics. Only its fluorcsccnce features and the FIIR stud make it possible to detect this rcsinixation and to approach the dcgrcc or maturation from the prcscm of cxudatcs in its structure.
Tha dlatrtbution of tan tnca alamanta and mlnarala %I01144 In thraa Ilgnlta aaama from tha Maa Moh Mlna, lhalland Hart, B. et al., Prcpr. Pap.-Am. Chem Sot., Div. Fuel Chem, 1994, 39, (2X495-499. Tbc distribution of 10 trace elements (i.e. MO, Ni, Pb, Sb, U, As, Co, Cr. Se. and Tb’, and several minerals were examined from three bmwn coal se&s, es&all for occurmnce and origin of the minerals and the extent of association 0r the trace elements.
%mllS2 Late Pannaln ago oi NH,-baarlng Illlta In anthracita from aaatarn Pannaylvanla: tamporal llmlta on coallftcatlon In tha cantral Appalaohlana Da&b, E. J. et aL, Geol. Sot. Am. Bull., 1994, 106, (6). 760-766.
Effact of hti traatmant procaaaaa on tha atrangth %/01145 ot braud Joint of coal cutter Huang, Y. Jin& Rechuli, 1994, (2). 12-15. (In Chines@ on the effect of heat treatment on the shearing strengh coal cutters. The time in high-temperature brazing ept short as long as the filler metal is fully melted. The. post rate has a peatcr effect on the shcariug strcngh of brazed omts. In , after braxmg, the post cooling time in 880-200°C range sLould be controlled at 5-20 minutes. The shearing strengh of brazed joints should have a valley in the 450-35oOCrange. Enthalpy ralaxatlon and glaaa tranaltlona In Polnt eslol146 of Ayr coal (latter) Mackinnon,A. J. et al., Fuel, Jan. 1995, 74, (l), p. 136. %I01 147 Evaluation oi coking propottlaa of coals by quantlflcatlon of pyrolyala products ezkfj et al., Nippon Enerugi Gakkaishi,1994, 73, (4). 279-289. (In In order to evaluate coal for CFtion of metallurgical co!tc, thcrmogravimctric analysis, quau cation of gaseous products durmg pyrolysis, and caking and coking pmperties of different ranks of coals, mduding air-oxidized coal, were investigated and results obtained are discussed. Evldanca for tha trlbochamlcal ganaratlon of %rnl142 hydrogen tram hlghar mnk coala Vorres, K. S. Prepr. Pap.-Am. Chem Sot., Div. Fuel Chem., 1994, 39, (2), 613-617. Analysis of gases in scaled ampoules of higher rank Argonne Premium coal samples over a period of years has revealed the pre-scnce of $gnifi+ (up to appmximatcx 18%) constant amovts of hydrogen and mcrcasmg amounts of carbon oxldc. Comparison with the gas contents of sealed 55 gal e which haye not been pul,verixcd indicates that these gasca came pe:xm_y$ followmg the c&e&on of the samples. Several hypotheses
95101149 Face alr condltlonlng wlth a watar-lea mlxtura Sander, R. et al., Gluechzuj 1994, 130, Q, 432-437. (In German) Describes ice cooling technology field trials in a 0.75 m thick Mausegatt seam at the Nicdcrberg coal mine, Germany. The cooling power of the ice generator is approximately 150 kW. Sixteen partial ooolcrs of a new ice cooler generation with a me-an cooling power of 5.5 kW are used on the fact. The compact face coolers have no movable parts and therefore require little maintenance. The air is circulated by an mtcgratcd air mover and cold air piper, which arc supplied with compressed-air from the face. %011% Qaa-dynamlc avaluatlon of a coal maaalf wlth a thraa-phaaa gas atata Poturraev,V. N. et aL, Fiz-Tekh. ProbL Razrab. Polezn. Mop., 1994, (l), 81-87. (In Russian) The gas dynamic state of a coal massif is analyzed theoretical, and it is assumed that CH, exists as fne gas, adsorbate. and hydrates. Results indicate that the bou&rics of CH,-hydratc dissociation~xonc nears a mining face as the rate of mining and the moisture content increase.
Llptlnlta In lndonaalan tartlary coals %/01152 Hutton, A. et al., Energy & Fue&, Nov.-Dec. 1994.8, (a), 1469-1477. A comparison of the petrographic data for coals from various Indonesian Tertiary basins shows that the coals have similar comuositions with vitrinite the dominant maccral group. A fenhue common td most of the coals is the abundance of secon liptinitc, c@e&llly cxsudatinite but also fluorinitc. The aas&ation “r0 cxsudatinitc with od, adjacent t+ or within liptinitc and vitrinitc maccrals, suggests that cxsudatinitc is an mdicator of od generation, but at an early stage. Bxsudatinite is probably an intcrmediate product in the pathway vitrinitc/liptinitc/oiL Or anic matter referable to cxsudatinite and/or bitumen is found m coals and d astic rooks 6om eastern Kalimantan. The petrographic properties of both are the same. Mlcropora ?? lza dlatrlbutlona and ?? paclflc Intone%/01154 Uona In coals Amarasekera, 0. et al., Fuel, Jan. 1995, 74, (l), 115-118. Micmporc surface areas, pore sixe distributions and pore volumes were determined for four bmwn coals, one medium-volatile subbituminous coal, one hi -volatile subbituminous coal, and one low-volatile bituminow coal n dioxide adsorption at 273X. For comparison, BBT surface areas byA were determined for two of the brown coals by nitrogen adsorption at 77 K Surface areas were consistent with published values. The micropore size distributions obtained using the Dubima-Mcdck approach wcrc found to be independent of coal rank and functional groups. %/0116s Mlnarala axplomtlon up 20 parcant QueenslandGovernmenrMbdnn J.. Dec. 1994. 95. 5-7. I&me& exploration in Queen&&d had incr&cd b almost 30% last financial year compared with the previous year, the &stcr of Minerals and Energy? Ton McGrady said when opening the Queensland Bxploration Potential 19!I4 Symposium. Mr. McGrady said GROMAP 2005 - a $56 million program to update the geoscicntific knowledge of Queensland by the year 2005, was another Queensland government initiative. The GEO+P 2005 mgram included the use of airborne geophysics and satcl$ete~e &her Gov_cnt initiatives included the Queen&ad Development Program (QTHBRM), a $1 million, three-year project to ensure that the higb quality of Queensland’s thermal coal was recognised by prospective buyers. and the Pacific Resource Information Ccntre, a three-year $3.6 million project to store, pmccss and interpret existing and proJected exploration data. %lOll% Modaa of oocurranca of traca alamanta In coal from XAFS apactroacopy Huggins, F. E et aL, Prepr. Pap.-Am. Chem Sot., Div. Fuel Chem, 1994, 39, (2), 504-508. Discusses the XAFS spectroscopic observations on modes of occurrcncc of trace elements (Cr, kp, N, and Br) in coal. Proposes a classification scheme with precise definitions for modes of occurrence. Natura and compoaltlon of tha Davonlan coala of Volkova. 1. B. Energy dr Fuels, Nov.-I&. 1994, 8, (a), 1489-1493. The first economic coal accumulation in the territory of Russia is associated with the Devonian debits of Siberia. In t$ Bv area of the Kuznctsk basin a 0.8-3.6 m ck coal scam occurs m Jivctmn. The mddle Devonian coals arc also recorded in tbc Urals and in Ka&h&an. They have a peculiar microstructure and contain a great amount of thick psilophytic cuticle (to 60%). The Barxas coals arc subbituminous and contain a lot of volatile matter and resins. The Upper Devonian coals differ in their composition and ori ‘nal matter from the Middle Devonian ones and arc similar to the Lower & bonifcrous coals in the European part of Russia. The occurrence areas of the Upper Devonian coals have a submcridional orientation (from the Russian Platform through Timan toward islands in the Arctic Gcean).
Fud and Enargy Abstracta March l%S
83
Solid fuels (sotmxw, winning, pttydes)
Tha dlatrlbutlon of In nlo ?? lamonto batwaan 96/01142 T anlta coal and mlnaral mattar In Rumanian Nascu,H. I. et aL, Fuel, Jan. 1995, 74, (l),i19-123. Cotrclations resultin from ash level determinations and X-my fluoresccncc data perform c! on lignite ash samples taken fmm the Campulung coal field, Rumanis, wcrc determined. The. cxistcncc of linear relationships between the concentrations of each analyscd clement: Si, Al, Ca, Fe, S, M Na and K (convcrtcd to oxides), and the ash content (9. basis) f?r ch+Icrent ash lcvcls~has been asccrtamed, arlth standard dcvlatrons, So m to the mean concentration of the oxide in the zal,an 4-)%,nw;h following suitable extrapolation, to estimate the .#z z oxide fractions which correspond to the parts of a given element bound to the coal’s organic and inorganic matter.
Influonca of raalnlta on humlnlta propartlar %lUlSl Suarez-Ruix. I. er al.. Enerpv & F&s. Nov.-Dec. 1994.. 8._ M. .,. 1417-1424. . Vitrain from Terucl (northeastern Spain) constitutes a good example of the influence of liptinitic compounds on propeztics of huminitc. The rcsinixation of the humotclinitic tissue of thii lithotypc has provoked an important suppression of its rcflectancc giving it a strongly perhydrogenated chmcter. Even though it later undergoes a diagcnctic evolution, ncithcr of the conventional rank parameters reflects the real degree of maturation rcached by this vitrain because of the important alteration of its propertics. Only its fluorcsccnce features and the FIIR stud make it possible to detect this rcsinixation and to approach the dcgrcc or maturation from the prcscm of cxudatcs in its structure.
Tha dlatrtbution of tan tnca alamanta and mlnarala %I01144 In thraa Ilgnlta aaama from tha Maa Moh Mlna, lhalland Hart, B. et al., Prcpr. Pap.-Am. Chem Sot., Div. Fuel Chem, 1994, 39, (2X495-499. Tbc distribution of 10 trace elements (i.e. MO, Ni, Pb, Sb, U, As, Co, Cr. Se. and Tb’, and several minerals were examined from three bmwn coal se&s, es&all for occurmnce and origin of the minerals and the extent of association 0r the trace elements.
%mllS2 Late Pannaln ago oi NH,-baarlng Illlta In anthracita from aaatarn Pannaylvanla: tamporal llmlta on coallftcatlon In tha cantral Appalaohlana Da&b, E. J. et aL, Geol. Sot. Am. Bull., 1994, 106, (6). 760-766.
Effact of hti traatmant procaaaaa on tha atrangth %/01145 ot braud Joint of coal cutter Huang, Y. Jin& Rechuli, 1994, (2). 12-15. (In Chines@ on the effect of heat treatment on the shearing strengh coal cutters. The time in high-temperature brazing ept short as long as the filler metal is fully melted. The. post rate has a peatcr effect on the shcariug strcngh of brazed omts. In , after braxmg, the post cooling time in 880-200°C range sLould be controlled at 5-20 minutes. The shearing strengh of brazed joints should have a valley in the 450-35oOCrange. Enthalpy ralaxatlon and glaaa tranaltlona In Polnt eslol146 of Ayr coal (latter) Mackinnon,A. J. et al., Fuel, Jan. 1995, 74, (l), p. 136. %I01 147 Evaluation oi coking propottlaa of coals by quantlflcatlon of pyrolyala products ezkfj et al., Nippon Enerugi Gakkaishi,1994, 73, (4). 279-289. (In In order to evaluate coal for CFtion of metallurgical co!tc, thcrmogravimctric analysis, quau cation of gaseous products durmg pyrolysis, and caking and coking pmperties of different ranks of coals, mduding air-oxidized coal, were investigated and results obtained are discussed. Evldanca for tha trlbochamlcal ganaratlon of %rnl142 hydrogen tram hlghar mnk coala Vorres, K. S. Prepr. Pap.-Am. Chem Sot., Div. Fuel Chem., 1994, 39, (2), 613-617. Analysis of gases in scaled ampoules of higher rank Argonne Premium coal samples over a period of years has revealed the pre-scnce of $gnifi+ (up to appmximatcx 18%) constant amovts of hydrogen and mcrcasmg amounts of carbon oxldc. Comparison with the gas contents of sealed 55 gal e which haye not been pul,verixcd indicates that these gasca came pe:xm_y$ followmg the c&e&on of the samples. Several hypotheses
95101149 Face alr condltlonlng wlth a watar-lea mlxtura Sander, R. et al., Gluechzuj 1994, 130, Q, 432-437. (In German) Describes ice cooling technology field trials in a 0.75 m thick Mausegatt seam at the Nicdcrberg coal mine, Germany. The cooling power of the ice generator is approximately 150 kW. Sixteen partial ooolcrs of a new ice cooler generation with a me-an cooling power of 5.5 kW are used on the fact. The compact face coolers have no movable parts and therefore require little maintenance. The air is circulated by an mtcgratcd air mover and cold air piper, which arc supplied with compressed-air from the face. %011% Qaa-dynamlc avaluatlon of a coal maaalf wlth a thraa-phaaa gas atata Poturraev,V. N. et aL, Fiz-Tekh. ProbL Razrab. Polezn. Mop., 1994, (l), 81-87. (In Russian) The gas dynamic state of a coal massif is analyzed theoretical, and it is assumed that CH, exists as fne gas, adsorbate. and hydrates. Results indicate that the bou&rics of CH,-hydratc dissociation~xonc nears a mining face as the rate of mining and the moisture content increase.
Llptlnlta In lndonaalan tartlary coals %/01152 Hutton, A. et al., Energy & Fue&, Nov.-Dec. 1994.8, (a), 1469-1477. A comparison of the petrographic data for coals from various Indonesian Tertiary basins shows that the coals have similar comuositions with vitrinite the dominant maccral group. A fenhue common td most of the coals is the abundance of secon liptinitc, c@e&llly cxsudatinite but also fluorinitc. The aas&ation “r0 cxsudatinitc with od, adjacent t+ or within liptinitc and vitrinitc maccrals, suggests that cxsudatinitc is an mdicator of od generation, but at an early stage. Bxsudatinite is probably an intcrmediate product in the pathway vitrinitc/liptinitc/oiL Or anic matter referable to cxsudatinite and/or bitumen is found m coals and d astic rooks 6om eastern Kalimantan. The petrographic properties of both are the same. Mlcropora ?? lza dlatrlbutlona and ?? paclflc Intone%/01154 Uona In coals Amarasekera, 0. et al., Fuel, Jan. 1995, 74, (l), 115-118. Micmporc surface areas, pore sixe distributions and pore volumes were determined for four bmwn coals, one medium-volatile subbituminous coal, one hi -volatile subbituminous coal, and one low-volatile bituminow coal n dioxide adsorption at 273X. For comparison, BBT surface areas byA were determined for two of the brown coals by nitrogen adsorption at 77 K Surface areas were consistent with published values. The micropore size distributions obtained using the Dubima-Mcdck approach wcrc found to be independent of coal rank and functional groups. %/0116s Mlnarala axplomtlon up 20 parcant QueenslandGovernmenrMbdnn J.. Dec. 1994. 95. 5-7. I&me& exploration in Queen&&d had incr&cd b almost 30% last financial year compared with the previous year, the &stcr of Minerals and Energy? Ton McGrady said when opening the Queensland Bxploration Potential 19!I4 Symposium. Mr. McGrady said GROMAP 2005 - a $56 million program to update the geoscicntific knowledge of Queensland by the year 2005, was another Queensland government initiative. The GEO+P 2005 mgram included the use of airborne geophysics and satcl$ete~e &her Gov_cnt initiatives included the Queen&ad Development Program (QTHBRM), a $1 million, three-year project to ensure that the higb quality of Queensland’s thermal coal was recognised by prospective buyers. and the Pacific Resource Information Ccntre, a three-year $3.6 million project to store, pmccss and interpret existing and proJected exploration data. %lOll% Modaa of oocurranca of traca alamanta In coal from XAFS apactroacopy Huggins, F. E et aL, Prepr. Pap.-Am. Chem Sot., Div. Fuel Chem, 1994, 39, (2), 504-508. Discusses the XAFS spectroscopic observations on modes of occurrcncc of trace elements (Cr, kp, N, and Br) in coal. Proposes a classification scheme with precise definitions for modes of occurrence. Natura and compoaltlon of tha Davonlan coala of Volkova. 1. B. Energy dr Fuels, Nov.-I&. 1994, 8, (a), 1489-1493. The first economic coal accumulation in the territory of Russia is associated with the Devonian debits of Siberia. In t$ Bv area of the Kuznctsk basin a 0.8-3.6 m ck coal scam occurs m Jivctmn. The mddle Devonian coals arc also recorded in tbc Urals and in Ka&h&an. They have a peculiar microstructure and contain a great amount of thick psilophytic cuticle (to 60%). The Barxas coals arc subbituminous and contain a lot of volatile matter and resins. The Upper Devonian coals differ in their composition and ori ‘nal matter from the Middle Devonian ones and arc similar to the Lower & bonifcrous coals in the European part of Russia. The occurrence areas of the Upper Devonian coals have a submcridional orientation (from the Russian Platform through Timan toward islands in the Arctic Gcean).
Fud and Enargy Abstracta March l%S
83