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01426 Selective production of BTX by hydrocracking of coal volatile matter over zeolite catalyst
04 95/91429 C&all?, Improvsmont method of fly ?? shoa Takavama. T. and Fudmoto. Y. (Assimed to) Ube Industries. JAP. Pal. JP,ti,,l26,Z2, May 1994. . ’ ” ’ Descnbcs a method for decreasing the unburned carbon of fly ashes from coal-fueled power plants. %/tm21
Quantum chomial study on the mrchsnlsm of roducln oxygenatsr In the Fischer-Tropsch synthssls on &a, (M = f!l, Ru, Rh, Pd) oatslysts Hao, Z. P. et al, Chin Char Lett., 1994.5, (6), 511-514. EHMO calculationsand orbital analysis of fragments were performed for oxygenate formation in Fischer-Tropsch synthesis using a butterfly model for the M/SiO, (M = Ni, Ru, Rh, Pd) catalysts.
%/91422 Rapid pyrolysis of cosls Sawaka, M. ef aL, (Assigned to) Nippon Steel Corp., JAP. Par. JP.06184.552. JuL 1994. The l&c&s &mpriscs the radiation of coals before pyrolysis, and is useful for controlling the yield of desired producta, such as light and heavy tar, benzene. toluene, xilenc. 95l91423 Rapid thermal dscomposltlon of coals for llght components Sakawa. M. et aL, (Assigned to) Nippon Steel Corp., JAP. Pat. JP.06184,548, JuL 1994. The process comprises. after separation of char and before collecting tar, irradation of rapId thermal decomposition products of coals with plasma. From this process a large amount of benzene, toluene, and xylene is obtained. %I01 424 Rdormlng of tar by plasma lrradlstlon for Ilght components Sakawa, M. ef aL, (Assigned to) Nippon Steel Corp., JAP. Pat. JP.O6,184,546, JuL 1994. The process comprises irradiation of tar with low-temperature plasma under H-containing atmosphere et 100-400’. The process gives large amounts of light components @TX, etc.). %I01 425 Ths sslsctlvs pathway to higher oxygsnatss from CO, H, olsflns and chlorocarbons Krishnamurthy, R. et al, Prepr. Pap.-Am. Chem. Sot., Div. Fuel Chem., 1994, 39, 4), 1136-1140. A study o! the synthesis of higher oxygenates from CO hydrogenation, ethylene addition, and addition of CH& to synthesis gas over Rh/SiO, catalyst. The insertion of linear CO into the adsorbed alkyl intermediates is the key step in the formation of higher oxygenates. 95101426 Solsctlvo production of BTX by hydrocracklng of cosl volatllo matter over zsollto catalyst Charcon anich, M. er aL, Energy & Fuels, Nov.-Dec. 1994, 8, (a), 1522.15%. 95101427 Separatlon snd rocovsry of valuable mstals from fly ash Lee, S. S. et aL, HwahukKong/& 1994, 32, (3), 300-307. (In Korean) The leachants of fly ash arc hydrochloric acid, sulphuric acid and water. The heavy oil fiy ash contains e high concentration of Ni, V, Ga, ctc; the leeching solution from coal fly ash has smaller contents of soluble metal ions than the heavy oil fiy ash. Before the recovery, the adsorption or ion exchange method was used as pretreatment. For an efficient leaching, two steps were taken to prevent any disturbances from other metal ions. %I91429 Ssparatlon of components In coal tar wlth crntrlfugs Sakurai, Y. et aL, (Assigned to) Nippon Steel Corp., JAP. Pat. JP.O6,+84,545,JuL 1994. Dcscnbm a process where the tar is treated by heating et a temperature range S-50” higher than m.p. of the tar followed by applying ccntigal acceleration 100-5000 G in a centrifuge to separate concentrated aliphatic components and concentrated aromatics in the tar.
By-products related to Lels
%/91439 Small-seals dumblllty study of gssifler slag - Port. land cement bknds Bland, C. H. et aL, Adv. Gem Res., 1994.6, (Zl), 37-43. Gasificr slag, a byproduct of the manufacture of substitute natural m is a potential n&v poiiolanic cement replacement material. Describes a smallscale durabiitv atudv of a series of blended cements as oaatc svstcms which has b& car&d out using two Portland cements blcnde&~ti~~o ver slags, and also with a granulated blast-furnace slag and a pulvcrlzcd fuel ash for comparison. %I91421 Soms rspscts of carbonlzatlon of mlxtums containing coal tar pitch snd grsphlto FOCI, compounds Furdin, G. et al., Carbon, 1994, 32, (4), W-604. Pyrolysis of coal tar articles within the pitch matrix. Contrary to many works described in c literature, FeCl intercalation in such small particles does not need stringent conditions h first-stage synthesis. Many kh0 reflections of the FeCl, lattice arc observed by X-ray diffraction; the incommensurability of the two macromolecular lattices (graphite and intcrcaletcd FeCla is well charactcrixed. Sonochsmlcsl trsatmmt of foul1 fuels 95Dl432 Sadeghi,K. M. et al., Energy Sources, 1994, 16, (3). 439-449. Describes a method developed to recover u graded lighter hydrocarbon liquid oils from an asphaltcnc-containin o’ material (tar sand, as halt, heavy oil, shale oil, coal liquids, etc) invof9ves: (1) dispersion of partz*Pes of the asphaltcne-containin material in an aqueous solution containin an inorganic base (e.g. Na8 H, Na,SiO,, etc.) and/or surfactant st ambient temperature and pressure, followed by (2) application of ultrasound. The process, which removed and/or converts the asphaltene frauion in the bituminous material to lighter fractions, is efficient and has a reaction time on the order of minutes. 95101433 Storage stablllty of llquld coal-tar pitch Lee, E. S. et aL, Light Met. (Warrendale, PA), 1994, 535-539. The pa r describes how a &age stability test was undertaken to determine p bquid coal-tar pitch can be stored in a conventional tank at 1900for 160 days without changing its softening point (Metier) by >5”. 95101434 Studlss In the dsvelopments of fly ash brlcka - An approach for cleanor snvlronment Dubc,S. K. and Pelit, A. Pm. Am Power Con&, 1994,56, (l), 471-176. Describes the process developed for the manufacture of lie-ash bricks. A detailed study is reported which was carried out on the bricks produced at $e moulding pressure of 240 kg/c$ with different proportions of sand and ime ~th fly ash and pond ash et dtiercnt steam autoclave pressures for 6
951014% Ths study of coal tar spoxy protsctlvo coatings by Impsdancs spsctroscopy Babic, R. et a& Prog. Org. Coat., 1994, 23, (J), 275-286. Steel panels coated with a coal tar epoxy composition were studii by impedance spectroscopy in the dry condition as well as during exposure to synthetic seawater and to 10% NaOH solution. In the temperature range from 0 to 20°C the dry coating behaves as an almost i&al capacitor with a dielectric constant ranging from 3.0 to 3.2. The coal tar epoxy coating immersed in synthetic seawater showed capacitative bchaviour over a long period of exposure, in the frequency range 100 Hx to 100 kHx. 95lOl436 Supercrltlcal fluld sxtractlon of turklsh Ilgnltss and oil shals wlth toluene mlxturer Fxol, M. et al., Fuel Sci TechnoL In+ 1994, 12, (6), 947-W. Discusses the su rcritical fluid extraction (WE) of two Turkish Iignites and oil shale w *$ toluene mixtures. Extractions recovered from SFE were fractionated into oils, asphaltenes and preasphaltcnes by solvent extraction. The conversion of lignitcs decreased with increasing n-pcntancc content in the mixture. The conversion and the extraction yield obtained from Goynuk oil shale is higher with toluenc mixture than tolucne.
SopsratIon of fullorsnos by chromatography on lnukai,Y. et al., Fuel, Jan. 1995, 74, (l), 83-87. A crude mixutre of C and C, fullerenes was chromatogrephcd on coals of rank var@g from f rown coal to ‘pseudo’ semianthracite to determine their capability as a separation medium for purifying C fullcrene. Considerable variation in separation performance was found%ctween the coals. Treatment of all these coals with te.trahvdrofuran imorovcd their subsequent rformancc, probably owing to s&lling of the’c&re.s<ing in a more p” avoureble pore structure. No correlation was observed between separation performa& and carbon arometicity as measured by n.m.r. Co& which are expected to have a high porosity in the transitional (mesopre) range (250 nm) a pear to perform best, probably because this pore slzc is appropriate for fuPlcrene separation.
%I01 427 Tar hydro rnatlon products - Raw matorlals for manufscturo of ammst Pc hydrocsrbons Ermagambttov,B. T. et al., Khim. TekhnoL TopL Masel, 1994, (6). 34-36. (In Russian) 95/01430 Tar structurr snd composltlon of West Slbsrlan oll dlstlllatos Ka&ma, L. P. et al-, Khim. Tekhnol. TopL Masel, 1994, (2), 27-30. (ln Tars in oil distillates, b. 350-420 and +&4900, were studied by usink chromatography IR spectroscopy, and d~elcctrometry in relation to their effect on addiuves in base oil end refming, dewaxing, and dcoiling.
Fuel and Energy Abstracts March 1995
99
Quantum chomial study on the mrchsnlsm of roducln oxygenatsr In the Fischer-Tropsch synthssls on &a, (M = f!l, Ru, Rh, Pd) oatslysts Hao, Z. P. et al, Chin Char Lett., 1994.5, (6), 511-514. EHMO calculationsand orbital analysis of fragments were performed for oxygenate formation in Fischer-Tropsch synthesis using a butterfly model for the M/SiO, (M = Ni, Ru, Rh, Pd) catalysts.
%/91422 Rapid pyrolysis of cosls Sawaka, M. ef aL, (Assigned to) Nippon Steel Corp., JAP. Par. JP.06184.552. JuL 1994. The l&c&s &mpriscs the radiation of coals before pyrolysis, and is useful for controlling the yield of desired producta, such as light and heavy tar, benzene. toluene, xilenc. 95l91423 Rapid thermal dscomposltlon of coals for llght components Sakawa. M. et aL, (Assigned to) Nippon Steel Corp., JAP. Pat. JP.06184,548, JuL 1994. The process comprises. after separation of char and before collecting tar, irradation of rapId thermal decomposition products of coals with plasma. From this process a large amount of benzene, toluene, and xylene is obtained. %I01 424 Rdormlng of tar by plasma lrradlstlon for Ilght components Sakawa, M. ef aL, (Assigned to) Nippon Steel Corp., JAP. Pat. JP.O6,184,546, JuL 1994. The process comprises irradiation of tar with low-temperature plasma under H-containing atmosphere et 100-400’. The process gives large amounts of light components @TX, etc.). %I01 425 Ths sslsctlvs pathway to higher oxygsnatss from CO, H, olsflns and chlorocarbons Krishnamurthy, R. et al, Prepr. Pap.-Am. Chem. Sot., Div. Fuel Chem., 1994, 39, 4), 1136-1140. A study o! the synthesis of higher oxygenates from CO hydrogenation, ethylene addition, and addition of CH& to synthesis gas over Rh/SiO, catalyst. The insertion of linear CO into the adsorbed alkyl intermediates is the key step in the formation of higher oxygenates. 95101426 Solsctlvo production of BTX by hydrocracklng of cosl volatllo matter over zsollto catalyst Charcon anich, M. er aL, Energy & Fuels, Nov.-Dec. 1994, 8, (a), 1522.15%. 95101427 Separatlon snd rocovsry of valuable mstals from fly ash Lee, S. S. et aL, HwahukKong/& 1994, 32, (3), 300-307. (In Korean) The leachants of fly ash arc hydrochloric acid, sulphuric acid and water. The heavy oil fiy ash contains e high concentration of Ni, V, Ga, ctc; the leeching solution from coal fly ash has smaller contents of soluble metal ions than the heavy oil fiy ash. Before the recovery, the adsorption or ion exchange method was used as pretreatment. For an efficient leaching, two steps were taken to prevent any disturbances from other metal ions. %I91429 Ssparatlon of components In coal tar wlth crntrlfugs Sakurai, Y. et aL, (Assigned to) Nippon Steel Corp., JAP. Pat. JP.O6,+84,545,JuL 1994. Dcscnbm a process where the tar is treated by heating et a temperature range S-50” higher than m.p. of the tar followed by applying ccntigal acceleration 100-5000 G in a centrifuge to separate concentrated aliphatic components and concentrated aromatics in the tar.
By-products related to Lels
%/91439 Small-seals dumblllty study of gssifler slag - Port. land cement bknds Bland, C. H. et aL, Adv. Gem Res., 1994.6, (Zl), 37-43. Gasificr slag, a byproduct of the manufacture of substitute natural m is a potential n&v poiiolanic cement replacement material. Describes a smallscale durabiitv atudv of a series of blended cements as oaatc svstcms which has b& car&d out using two Portland cements blcnde&~ti~~o ver slags, and also with a granulated blast-furnace slag and a pulvcrlzcd fuel ash for comparison. %I91421 Soms rspscts of carbonlzatlon of mlxtums containing coal tar pitch snd grsphlto FOCI, compounds Furdin, G. et al., Carbon, 1994, 32, (4), W-604. Pyrolysis of coal tar articles within the pitch matrix. Contrary to many works described in c literature, FeCl intercalation in such small particles does not need stringent conditions h first-stage synthesis. Many kh0 reflections of the FeCl, lattice arc observed by X-ray diffraction; the incommensurability of the two macromolecular lattices (graphite and intcrcaletcd FeCla is well charactcrixed. Sonochsmlcsl trsatmmt of foul1 fuels 95Dl432 Sadeghi,K. M. et al., Energy Sources, 1994, 16, (3). 439-449. Describes a method developed to recover u graded lighter hydrocarbon liquid oils from an asphaltcnc-containin o’ material (tar sand, as halt, heavy oil, shale oil, coal liquids, etc) invof9ves: (1) dispersion of partz*Pes of the asphaltcne-containin material in an aqueous solution containin an inorganic base (e.g. Na8 H, Na,SiO,, etc.) and/or surfactant st ambient temperature and pressure, followed by (2) application of ultrasound. The process, which removed and/or converts the asphaltene frauion in the bituminous material to lighter fractions, is efficient and has a reaction time on the order of minutes. 95101433 Storage stablllty of llquld coal-tar pitch Lee, E. S. et aL, Light Met. (Warrendale, PA), 1994, 535-539. The pa r describes how a &age stability test was undertaken to determine p bquid coal-tar pitch can be stored in a conventional tank at 1900for 160 days without changing its softening point (Metier) by >5”. 95101434 Studlss In the dsvelopments of fly ash brlcka - An approach for cleanor snvlronment Dubc,S. K. and Pelit, A. Pm. Am Power Con&, 1994,56, (l), 471-176. Describes the process developed for the manufacture of lie-ash bricks. A detailed study is reported which was carried out on the bricks produced at $e moulding pressure of 240 kg/c$ with different proportions of sand and ime ~th fly ash and pond ash et dtiercnt steam autoclave pressures for 6
951014% Ths study of coal tar spoxy protsctlvo coatings by Impsdancs spsctroscopy Babic, R. et a& Prog. Org. Coat., 1994, 23, (J), 275-286. Steel panels coated with a coal tar epoxy composition were studii by impedance spectroscopy in the dry condition as well as during exposure to synthetic seawater and to 10% NaOH solution. In the temperature range from 0 to 20°C the dry coating behaves as an almost i&al capacitor with a dielectric constant ranging from 3.0 to 3.2. The coal tar epoxy coating immersed in synthetic seawater showed capacitative bchaviour over a long period of exposure, in the frequency range 100 Hx to 100 kHx. 95lOl436 Supercrltlcal fluld sxtractlon of turklsh Ilgnltss and oil shals wlth toluene mlxturer Fxol, M. et al., Fuel Sci TechnoL In+ 1994, 12, (6), 947-W. Discusses the su rcritical fluid extraction (WE) of two Turkish Iignites and oil shale w *$ toluene mixtures. Extractions recovered from SFE were fractionated into oils, asphaltenes and preasphaltcnes by solvent extraction. The conversion of lignitcs decreased with increasing n-pcntancc content in the mixture. The conversion and the extraction yield obtained from Goynuk oil shale is higher with toluenc mixture than tolucne.
SopsratIon of fullorsnos by chromatography on lnukai,Y. et al., Fuel, Jan. 1995, 74, (l), 83-87. A crude mixutre of C and C, fullerenes was chromatogrephcd on coals of rank var@g from f rown coal to ‘pseudo’ semianthracite to determine their capability as a separation medium for purifying C fullcrene. Considerable variation in separation performance was found%ctween the coals. Treatment of all these coals with te.trahvdrofuran imorovcd their subsequent rformancc, probably owing to s&lling of the’c&re.s<ing in a more p” avoureble pore structure. No correlation was observed between separation performa& and carbon arometicity as measured by n.m.r. Co& which are expected to have a high porosity in the transitional (mesopre) range (250 nm) a pear to perform best, probably because this pore slzc is appropriate for fuPlcrene separation.
%I01 427 Tar hydro rnatlon products - Raw matorlals for manufscturo of ammst Pc hydrocsrbons Ermagambttov,B. T. et al., Khim. TekhnoL TopL Masel, 1994, (6). 34-36. (In Russian) 95/01430 Tar structurr snd composltlon of West Slbsrlan oll dlstlllatos Ka&ma, L. P. et al-, Khim. Tekhnol. TopL Masel, 1994, (2), 27-30. (ln Tars in oil distillates, b. 350-420 and +&4900, were studied by usink chromatography IR spectroscopy, and d~elcctrometry in relation to their effect on addiuves in base oil end refming, dewaxing, and dcoiling.
Fuel and Energy Abstracts March 1995
99