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178. The influence of quinoline insoluble pitch constituents on the carbonisation rate and coke structure
144
Abstracts
Research Znstitute, Facu~fy of Enginee~ng, Hokkuido University, Sapporo, &59,Japan). Time-dependent proton NMR spectra of pitches and vacuum residues were observed at high temperatures (660-720K) and a kinetic analysis of the changes of aliphatic hydrogen fraction obtained from the spectra were made. Relations between kinetic parameters and optical textures of resultant cokes were discussed. 171. Carbonization of partially hydrogenated aromatics I. Mochida, K. Takeshita, H. Matsuoka, Y. Korai, H. Fujitsu and K. Tamaru (Research Institute of Z~dust~al Science, Kyushu University 86, Fukuoka 812, Japan). Partial hydrogenation increases the carbonization reactivity of aromatic hydrocarbons. For example no pyrene carbonize under atmospheric pressure, whereas its hydrogenated derivatives give a coke with flow texture at 25% yield. An oxidation of hydrogenated one further increases the coke yield up to 4.5%. The mechanism of carbonization of partially hydrogenated aromatics will be discussed. 172. Carbouizatktn properties of pitch oxidized by air blowing I. Mochida, T. Inaba, Y. Korai, H. Fujitsu and K. Takeshita (Research Znsfitute of Zndusf~al Science, Kyushu University 86, Fukuoka, 812, fapan). Structural change of air-oxidized extracted residue was studied by NMR, IR molecular weight measurement. Its carbonization reaction was investigated by observing the intermed~te stage of the reaction in order to reveal how the air~xidation converts the pitch to give mosaic texture. Further modification by acidic catalyst will also be reported. 173. Fourier transform IR and solid state ‘% nuclear magnetic resonance spectroscopic analysis of pyrolyzed asph&ues Victoria L. Weinberg and T. F. Yen (Uniuersity of Southern California, University Park, LA., CA 9ooo7) and Bernard C. Gerstein and P. Dubois Murphy (Iowa State University, Department of Chemistry, Ames, ZA50OIf). Asphaltenes from coal liquefaction processes were pyrolysed and their pyrolysis residues studied using Fourier transform infrared and solid state “C nuclear magnetic resonance spectroscopic analyses. Changes in structural parameters such as aromaticity and oxygen functionality were studied and their effects on mesophase formation determined. 174. R~a~~~ between bydrogeu donor abflities of pitches and coals and optical textures of cokes T. Yokono, K. Miyazawa, T. Obara, Y. Sanada (Coal Research Institute, Faculty of Engineering, Hokkaido UniversityNJ3, W-8, Sapporo WO,Japan) and H. Marsh (~o~hern Carbon Research ~borato~es, School of Chemists, Univers~y of Newcastle upon Tyne, Newcastle upon Tyne, NE1 7RU, England). Correlations are established of size and shape of opfical textures of cokes with the hydrogen donor abilities of parent petroleum pitches and with their pyrolysis chemistry. Hydrogen
transfer reactions are studied using model-organic compounds. Transferable hydrogen is studied in coals and hydrogenated ethylene-tar pitch. 175. Aromatie pit& production using steam cracker tar G. Dickakian (Exxon Chemical Company, Linden, N~~7~3~. Steam cracker tar which is composed of alkyl-substituted polycoused aromatic (I-5 rings) is transformed into high aromaticity pitches by physical, thermal and catalytic processes. The aromatic pitches produced by the various processes vary in their physical, chemical, thermal, molecular weight, and distillation characteristics. These characteristics are quanti~tively determined. High temperature thermal processes are found to be very efficient in preparing the high aromaticity pitch. The effect of temperature used and mechanism will be discussed. 176. C~r~~~n parry of coal based pItcItes I. Mochida, Y. Korai and K. Takeshita (Research Institute of Industrial Science, Kyushu University 86, Fukuoku 812, Japan) and K. Mukai, W. Migitaka and Y. Suetsuga (Nittetsu Chemical Industrial Company, Tokyo MI, .Zapan). Two aspects of cocarbonization process was studied to get a carbon of well~eveloped anisotropy-1. Cocar~nization of non-hydrogenative solvent treat coal (STC). By fractionation of the proper component of STC. The amount of additive required was found to be varied for the well-developed anisotropy-2. The modification activity of coal tar fractions. QI free tar obtained by an anti-solvent separation is found to show an excellent activity vs carboni~tion of a petroleum vacuum residue. 177. Kinetics of earbonIzation of anthracene Alan W. Scaroni, Philip L. Walker, Jr. and Robert G. Jenkins (~pa#ment of Materials Science & ~nginee~ng, The Pennsylvania State University, University Park, PA I6802). Liquid phase carbonization of anthracene was performed in a pressurized bomb reactor. The ap pearance of pyridine insoluble material was monitored as a function of reaction temperature and isothermal reaction time. The overall reaction was pseudo-first-order in the appearance of pyridine insolubles with rate constants of 4.3 x 109exp (-192 WfmolefRJ) s-‘. 178. The influence of qulnoline insoluble p&b constftuents on Ckecarbonisationrate and coke structure H, Tilimanns (SZGRI ELEKTRGGRAPZZZTGMBH, Werk G~esheim, Stroofstr. 27, D 6230 Frankfu~ 80, Germany). The study showed that the presence of quinoline insolubles is shifting the mesophase formation to lower temperature and increases the carbonisation rate. Furthermore can the coke structure and properties be controlled by the addition of quinoline insoluble. 179. Mesophase fo~a~n in the pyrolysis of solvent-fraetionated piteb V. L. Weinberg and J. L. White (The Ivan A. Getting Laboratories, The Aerospace Corporation, P.O. Box 92957, Los Angeles, CA 9ooo9). Petroleum pitch (Ash-
Abstracts
Research Znstitute, Facu~fy of Enginee~ng, Hokkuido University, Sapporo, &59,Japan). Time-dependent proton NMR spectra of pitches and vacuum residues were observed at high temperatures (660-720K) and a kinetic analysis of the changes of aliphatic hydrogen fraction obtained from the spectra were made. Relations between kinetic parameters and optical textures of resultant cokes were discussed. 171. Carbonization of partially hydrogenated aromatics I. Mochida, K. Takeshita, H. Matsuoka, Y. Korai, H. Fujitsu and K. Tamaru (Research Institute of Z~dust~al Science, Kyushu University 86, Fukuoka 812, Japan). Partial hydrogenation increases the carbonization reactivity of aromatic hydrocarbons. For example no pyrene carbonize under atmospheric pressure, whereas its hydrogenated derivatives give a coke with flow texture at 25% yield. An oxidation of hydrogenated one further increases the coke yield up to 4.5%. The mechanism of carbonization of partially hydrogenated aromatics will be discussed. 172. Carbouizatktn properties of pitch oxidized by air blowing I. Mochida, T. Inaba, Y. Korai, H. Fujitsu and K. Takeshita (Research Znsfitute of Zndusf~al Science, Kyushu University 86, Fukuoka, 812, fapan). Structural change of air-oxidized extracted residue was studied by NMR, IR molecular weight measurement. Its carbonization reaction was investigated by observing the intermed~te stage of the reaction in order to reveal how the air~xidation converts the pitch to give mosaic texture. Further modification by acidic catalyst will also be reported. 173. Fourier transform IR and solid state ‘% nuclear magnetic resonance spectroscopic analysis of pyrolyzed asph&ues Victoria L. Weinberg and T. F. Yen (Uniuersity of Southern California, University Park, LA., CA 9ooo7) and Bernard C. Gerstein and P. Dubois Murphy (Iowa State University, Department of Chemistry, Ames, ZA50OIf). Asphaltenes from coal liquefaction processes were pyrolysed and their pyrolysis residues studied using Fourier transform infrared and solid state “C nuclear magnetic resonance spectroscopic analyses. Changes in structural parameters such as aromaticity and oxygen functionality were studied and their effects on mesophase formation determined. 174. R~a~~~ between bydrogeu donor abflities of pitches and coals and optical textures of cokes T. Yokono, K. Miyazawa, T. Obara, Y. Sanada (Coal Research Institute, Faculty of Engineering, Hokkaido UniversityNJ3, W-8, Sapporo WO,Japan) and H. Marsh (~o~hern Carbon Research ~borato~es, School of Chemists, Univers~y of Newcastle upon Tyne, Newcastle upon Tyne, NE1 7RU, England). Correlations are established of size and shape of opfical textures of cokes with the hydrogen donor abilities of parent petroleum pitches and with their pyrolysis chemistry. Hydrogen
transfer reactions are studied using model-organic compounds. Transferable hydrogen is studied in coals and hydrogenated ethylene-tar pitch. 175. Aromatie pit& production using steam cracker tar G. Dickakian (Exxon Chemical Company, Linden, N~~7~3~. Steam cracker tar which is composed of alkyl-substituted polycoused aromatic (I-5 rings) is transformed into high aromaticity pitches by physical, thermal and catalytic processes. The aromatic pitches produced by the various processes vary in their physical, chemical, thermal, molecular weight, and distillation characteristics. These characteristics are quanti~tively determined. High temperature thermal processes are found to be very efficient in preparing the high aromaticity pitch. The effect of temperature used and mechanism will be discussed. 176. C~r~~~n parry of coal based pItcItes I. Mochida, Y. Korai and K. Takeshita (Research Institute of Industrial Science, Kyushu University 86, Fukuoku 812, Japan) and K. Mukai, W. Migitaka and Y. Suetsuga (Nittetsu Chemical Industrial Company, Tokyo MI, .Zapan). Two aspects of cocarbonization process was studied to get a carbon of well~eveloped anisotropy-1. Cocar~nization of non-hydrogenative solvent treat coal (STC). By fractionation of the proper component of STC. The amount of additive required was found to be varied for the well-developed anisotropy-2. The modification activity of coal tar fractions. QI free tar obtained by an anti-solvent separation is found to show an excellent activity vs carboni~tion of a petroleum vacuum residue. 177. Kinetics of earbonIzation of anthracene Alan W. Scaroni, Philip L. Walker, Jr. and Robert G. Jenkins (~pa#ment of Materials Science & ~nginee~ng, The Pennsylvania State University, University Park, PA I6802). Liquid phase carbonization of anthracene was performed in a pressurized bomb reactor. The ap pearance of pyridine insoluble material was monitored as a function of reaction temperature and isothermal reaction time. The overall reaction was pseudo-first-order in the appearance of pyridine insolubles with rate constants of 4.3 x 109exp (-192 WfmolefRJ) s-‘. 178. The influence of qulnoline insoluble p&b constftuents on Ckecarbonisationrate and coke structure H, Tilimanns (SZGRI ELEKTRGGRAPZZZTGMBH, Werk G~esheim, Stroofstr. 27, D 6230 Frankfu~ 80, Germany). The study showed that the presence of quinoline insolubles is shifting the mesophase formation to lower temperature and increases the carbonisation rate. Furthermore can the coke structure and properties be controlled by the addition of quinoline insoluble. 179. Mesophase fo~a~n in the pyrolysis of solvent-fraetionated piteb V. L. Weinberg and J. L. White (The Ivan A. Getting Laboratories, The Aerospace Corporation, P.O. Box 92957, Los Angeles, CA 9ooo9). Petroleum pitch (Ash-