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02654 Significance of expansion pressure of coal during coking
02 97102641 Effect of oven width on coking time Nazarov, 1. et al. Koks Khim., 1996, (1l), 17-20. (In Russian) An equation is presented for the relation between coking time and coke oven width. 97102642 Estimation of thermal diffusivity of solid part of coke based on image data Nishioka. K. et al. T&u to Hagane, 1997, 83, (I), 7-1 I. (In Japanese) Computer simulation of heat transfer using imaging data of the sample microstructure was used to estimate the ratio of thermal diffusivity of the solid part of the coke tn effective thermal diffusivity. The findings are presented. 97102643 Hyperbaric filtration as a means of increasing fine coal production Hughes, J. et al. froc. Anna. Irzt. Pittsburgh Coal Conf. 1996, 13, (2), 1381-
1386.
Extensive preparation, plant modifications, and larger dryers are often required for the need for lower sulfur coals with lower final moisture in order to meet North American utility requirements. Hyperbaric filtration as employed in the ANDRITZ Hyperbaric Filter (HBF), has hecome accepted technology for coal preparation plant retrofits through Europe and Asia. The possibility for the implementation of hyperbaric filtration in North American preparation plants is investigated. The use of HBF aims to increase fine coal production and BTU values through lower cake moisture, while lowering thermal dryer cost and stack emissions. 97102644 Kinetic study of COP gasification of maceral chars prepared from British coal Zhao. W. et a/. Meitun Zhuanhlia. 1996, 19, (4), 50-55. (In Chinese) A study was conducted on three maceral groups (vitrinite, fusinite and exinite) separated from British coal and their gasification kinetics in CO? were studied by TGA (thermogravimetric analysis) at the pressure of 0.1 MPa. Kinetic parameters were obtained by fitting TGA data of isothermal cxperimcnts on the three maceral groups. Manufacture of coke for blast furnaces 97102645 Kato. K. et al. Jpn.. Kokai Tokkyo Koho JP 09 48.977 [97 48,977] (Cl. CI OBS7iOX), 18 Feh 1997. Appl. 95/199,364, 4 Aug 1995, 5 pp. (In Japanese) R&v materials are used containing O-60 wt% non-slightly-caking coal and balance caking coal by heating with heating rate 100%1OOO”Cis to 3SO45O’C. classification. hot agglomeration of fine powder coal, mixing with coarse powder coal, and carbonization in coke ovens. The process provides low cost and high efficiency. Manufacture of flowable granular fuel 97102646 Silogran Trading Ag, Switz. Ger. Offen. DE 19529,441 (Cl. CIOLS/OZ). I3 Feb 1997, Appl. 19.529,441, IO Aug 1995. 4 pp. (In German) A mixture of a liquid or pasty combustible industrial residue and coal, brown coal, or coke carrier (as an adsorbent) balance is used to produce flowable granular fuel. The homogenized mixture is then comminuted in a hammer mill to attain a particle size of
Liquid fuels (sources,
properties,
recovery)
97102649 Postreaction mechanical strength of coke from Kuznetsk coals Bazegskii, A. E. et al. Koks Khim., 1996. (ll), 21-22. (In Russian) Cokes produced from Kuznetsk coals at several Siberian plants were studied to determine their mechanical strength after reaction with CO2 at 1100°C. All these cokes met the CSR and CR1 mechanical strength standards. 97102650 Preparation of high-quality pitches. Review. Ruschev, D. D. and Bekyarova, E.E. Koks Khim.. 1996, (I I), 29-33. Coal-tar pitch specifications and methods for its preparation are presented. 97102651 Production of coke from non-caking bituminous coal Caplin, P. B. S. African ZA 95 06,406 (Cl. CO1 B). I I Mar 1996. ZA Appl. 9417,600, 29 Sep 1994, I7 pp. Non-caking bituminous coal was heated in a reactor with hot gases of substantially stoichiometric combustion of a hydrocarbon fuel. The atmospheric in the reactor maintained inert by the injection of steam into the reactor in quantities sufficient to at least saturate the atmospheric. The acidity of the atmospheric in the reactor is maintained and the steam is introduced into the reactor in 0.2-0.7 wt8 of coal treated. The gas vented from the reactor is stripped of tars and liquor and recycled. 97102652 Programmeable temperature control in an electric furnace for laboratory coking based on a microprocessor controller Reznikov, Y. A. et al. Koks Khim., 1996, (O), 30. (In Russian) An accuracy of 10.5% is achieved with a microprocessor-based programmable temperature controller for an electric furnace for laboratory coking. It can be programmed for cycles up to 259 min. It controls both wall and inside temperatures. 97102653 Prospects and technology for manufacture ash coke Sidorov, 0. F. Koks Khim., 1996, (10). 20-24. (In Russian) Technologies coking petroleum residual feedstocks and coal-tar manufacture of low-ash coke are reviewed.
of low-
pitch for
97102654 Significance of expansion pressure of coal during coking Stuchlik, V. Hum. Listy, 1996, 51. (I I), 3-9 (In Czech) The author discusses a mechanism of expansion pressure generation during coking. Effect of initial coking conditions and coal properties on the expansion pressure was evaluated and experimental laboratory results of expansion pressure determination are presented for various types of coal. 97102655 Studies on reactivity and porosity development in chars, and the carbon dioxide reaction via temperatureprogrammed desorption (carbon dioxide, micropore, coal) Zhang, L. Diss. Ahstr. Int., B. 1997. 57. (IO). 266 pp. 97102656 Study of combustion of coal char by thermogravimetry Li, W. et al. Milan Zhuanhua, 1996, 19, (3). 76-81. (In Chinese) The use of thermogravimetry in studies of coal char combustion is reported. Some of the issues discussed are characterization of specific temperatures in the combustion process of coal char, and the dynamics of coal-char combustion.
02
LIQUID Sources,
FUELS
Properties,
Recovery
97102657 Approximations for burning velocities and Markstein numbers for lean hydrocarbon and methanol flames Muller, U. C. et al. Comhmtim and Flame, 1997, 108, (3), 349-3.56. The authors calculated the burning velocities of lean-to-stoichiometric nheptane-, iso-octane-, and methanol-air mixtures over a wide range of pressure and preheat temperatures. The numerical calculations are based on elementary reaction mechanisms comprising a few hundred reactions. A two-equation analytic expression that has successfully been applied for flames of methane, ethylene, ethane, acetylene, and propane was implemented to approximate them. Markstein numbers are also predicted for all these fuels and compared with the few existing experimental data on Markstein numbers in the literaturd.
Fuel and Energy Abstracts
July 1997
219
1386.
Extensive preparation, plant modifications, and larger dryers are often required for the need for lower sulfur coals with lower final moisture in order to meet North American utility requirements. Hyperbaric filtration as employed in the ANDRITZ Hyperbaric Filter (HBF), has hecome accepted technology for coal preparation plant retrofits through Europe and Asia. The possibility for the implementation of hyperbaric filtration in North American preparation plants is investigated. The use of HBF aims to increase fine coal production and BTU values through lower cake moisture, while lowering thermal dryer cost and stack emissions. 97102644 Kinetic study of COP gasification of maceral chars prepared from British coal Zhao. W. et a/. Meitun Zhuanhlia. 1996, 19, (4), 50-55. (In Chinese) A study was conducted on three maceral groups (vitrinite, fusinite and exinite) separated from British coal and their gasification kinetics in CO? were studied by TGA (thermogravimetric analysis) at the pressure of 0.1 MPa. Kinetic parameters were obtained by fitting TGA data of isothermal cxperimcnts on the three maceral groups. Manufacture of coke for blast furnaces 97102645 Kato. K. et al. Jpn.. Kokai Tokkyo Koho JP 09 48.977 [97 48,977] (Cl. CI OBS7iOX), 18 Feh 1997. Appl. 95/199,364, 4 Aug 1995, 5 pp. (In Japanese) R&v materials are used containing O-60 wt% non-slightly-caking coal and balance caking coal by heating with heating rate 100%1OOO”Cis to 3SO45O’C. classification. hot agglomeration of fine powder coal, mixing with coarse powder coal, and carbonization in coke ovens. The process provides low cost and high efficiency. Manufacture of flowable granular fuel 97102646 Silogran Trading Ag, Switz. Ger. Offen. DE 19529,441 (Cl. CIOLS/OZ). I3 Feb 1997, Appl. 19.529,441, IO Aug 1995. 4 pp. (In German) A mixture of a liquid or pasty combustible industrial residue and coal, brown coal, or coke carrier (as an adsorbent) balance is used to produce flowable granular fuel. The homogenized mixture is then comminuted in a hammer mill to attain a particle size of
Liquid fuels (sources,
properties,
recovery)
97102649 Postreaction mechanical strength of coke from Kuznetsk coals Bazegskii, A. E. et al. Koks Khim., 1996. (ll), 21-22. (In Russian) Cokes produced from Kuznetsk coals at several Siberian plants were studied to determine their mechanical strength after reaction with CO2 at 1100°C. All these cokes met the CSR and CR1 mechanical strength standards. 97102650 Preparation of high-quality pitches. Review. Ruschev, D. D. and Bekyarova, E.E. Koks Khim.. 1996, (I I), 29-33. Coal-tar pitch specifications and methods for its preparation are presented. 97102651 Production of coke from non-caking bituminous coal Caplin, P. B. S. African ZA 95 06,406 (Cl. CO1 B). I I Mar 1996. ZA Appl. 9417,600, 29 Sep 1994, I7 pp. Non-caking bituminous coal was heated in a reactor with hot gases of substantially stoichiometric combustion of a hydrocarbon fuel. The atmospheric in the reactor maintained inert by the injection of steam into the reactor in quantities sufficient to at least saturate the atmospheric. The acidity of the atmospheric in the reactor is maintained and the steam is introduced into the reactor in 0.2-0.7 wt8 of coal treated. The gas vented from the reactor is stripped of tars and liquor and recycled. 97102652 Programmeable temperature control in an electric furnace for laboratory coking based on a microprocessor controller Reznikov, Y. A. et al. Koks Khim., 1996, (O), 30. (In Russian) An accuracy of 10.5% is achieved with a microprocessor-based programmable temperature controller for an electric furnace for laboratory coking. It can be programmed for cycles up to 259 min. It controls both wall and inside temperatures. 97102653 Prospects and technology for manufacture ash coke Sidorov, 0. F. Koks Khim., 1996, (10). 20-24. (In Russian) Technologies coking petroleum residual feedstocks and coal-tar manufacture of low-ash coke are reviewed.
of low-
pitch for
97102654 Significance of expansion pressure of coal during coking Stuchlik, V. Hum. Listy, 1996, 51. (I I), 3-9 (In Czech) The author discusses a mechanism of expansion pressure generation during coking. Effect of initial coking conditions and coal properties on the expansion pressure was evaluated and experimental laboratory results of expansion pressure determination are presented for various types of coal. 97102655 Studies on reactivity and porosity development in chars, and the carbon dioxide reaction via temperatureprogrammed desorption (carbon dioxide, micropore, coal) Zhang, L. Diss. Ahstr. Int., B. 1997. 57. (IO). 266 pp. 97102656 Study of combustion of coal char by thermogravimetry Li, W. et al. Milan Zhuanhua, 1996, 19, (3). 76-81. (In Chinese) The use of thermogravimetry in studies of coal char combustion is reported. Some of the issues discussed are characterization of specific temperatures in the combustion process of coal char, and the dynamics of coal-char combustion.
02
LIQUID Sources,
FUELS
Properties,
Recovery
97102657 Approximations for burning velocities and Markstein numbers for lean hydrocarbon and methanol flames Muller, U. C. et al. Comhmtim and Flame, 1997, 108, (3), 349-3.56. The authors calculated the burning velocities of lean-to-stoichiometric nheptane-, iso-octane-, and methanol-air mixtures over a wide range of pressure and preheat temperatures. The numerical calculations are based on elementary reaction mechanisms comprising a few hundred reactions. A two-equation analytic expression that has successfully been applied for flames of methane, ethylene, ethane, acetylene, and propane was implemented to approximate them. Markstein numbers are also predicted for all these fuels and compared with the few existing experimental data on Markstein numbers in the literaturd.
Fuel and Energy Abstracts
July 1997
219