Coal tar pitch composition The complex nature of the pitch was apparent from the MS studies and the “average” structure indicates that the pitch consists predominately of large Pitch composition must 1104 Fuel 1996 Volume 75 Number 9 Analysis of coal tar pitch: relations between thermal behaviour and composition: M. Fuel 1996 Volume 75 Number 9 1105 Analysis of coal tar pitch: relations between thermal behaviour and composition: M. I Introduction 264II Coal-Tar Pitch Preparation 266III Coal-tar Pitch Composition 269676A Bulk Characterization of Pitches 270676A Feature of Coal-T Tar Pitch Compositions 271 C Pitch Fractionation 273676Pitch Pyrolysis Behavior 281676A Principles of Pitch Carbonization 281 C Carbonization of Model Aromatic Compounds 283676C 2- PP118: petroleum pitch (ZL 118 CAS NO 68187-58-6) with softening points of 113°C. 2 Analytical techniques . : 121575-60-8) with softening point of 235°C. Jan 6, 2025 · The number of specific chemical constituents is in the thousands. 1 Coal tar pitch. CONCLUSIONS capacity. The specific gravity of coal tar at 15 deg C varies between 1. Coal tar pitch is a highly viscous dark semisolid byproduct of coal pyrolysis. Principles of Pitch Carbonization 281 B. Both poor utilization and mishandling may result in serious environmental and health issues, since PAH massively present in CTP are carcinogenic and mutagenic [3]. Coal tar pitch is similar in composition to coal tar creosote and is not presented separately. Various characterization techniques were applied to evaluate the effects of the HRCTP addition on the MLRCTP's structure and composition Aug 1, 2023 · Coal tar pitch is a solid product of coal tar distillation, accounting for about 50–60 wt% of HTCT (Liu et al. Elemental analysis. 40 The molecular structure of coal tar pitches usually consists of an aromatic core with only a few methyl groups attached. 20, depending upon the temperature of carbonization or kind of coke ovens used. The whole pitch was studied by elemental analysis, IR, 13 C and 1 H NMR as well as soft ionization MS techniques. 2. Carbonization of Pitch Dec 26, 2018 · Coal tar pitch is currently produced from coal tar, which is a byproduct of high temperature coking of coal in the manufacture of metallurgical coke. Guillkn et al. nih. , 2016). Bulk Characterization of Pitches 270 B. 8. Carbonization of Model Aromatic Compounds 283 C. Coal tar pitch is defined as the residue (nonvolatile at 450°C) from the distillation of coal tars produced by the high temperature pyrolysis (>1000°C) of coal. TL;DR: In this paper, coal-tar pitch pyrolysis behavior was studied. 4- Electrode binder: coal tar pitch (Electrode Binder BX 95KS, CAS NO. The tar predominantly contains a mixture of bi- and poly-condensed aromatic hydrocarbons and also compounds with heteroatoms in rings (predominantly nitrogen bases from the quinoline and acridine Feb 15, 2024 · To further quantify the biochar improvement on the carbonization of coal tar pitch, a laser Raman spectrometer (LabRAM HR800) examined the carbonization substance of coal tar pitch and its mixture with biochar, as shown in Fig. In that sense, coal tar pitch is Coal-tar pitch and associated exposures were considered by previous IARC Working Groups in 1984, 1987, and 2005 (IARC, 1985, 1987, 2010). Features of Coal-Tar Pitch Composition 271 C. Feb 9, 2019 · Both the method by which the coal tar is produced and the nature of the raw material (coal) influence to a wide extent the chemical composition and physical properties of the coal tar. Jan 1, 2003 · Request PDF | Coal-tar pitch: Composition and pyrolysis behavior | As stated in the introduction, despite the huge amount of research performed over the years and the great advances achieved in Jul 1, 1996 · Because of this, coal tar pitch behaviour may be related to the composition of the volatile fraction. 2. Primary Quinoline Insolubles 280 IV. CTP is a complex mixture composed of PAHs and their derivatives (Zhou et al. D. Since that time new data have become available, which have been incorporated in this Monograph, and taken into consideration in the present evaluation. Coal tar pitch volatiles are compounds given off from coal tar pitch when it is heated. We used high-temperature refined coal tar pitch (HRCTP) to modify medium–low-temperature refined coal tar pitch (MLRCTP) for needle coke preparation. 12 and 1. Pitch Fractionation 273 D. Coal tar is produced through thermal destruction of coal. Aug 30, 2024 · The structure and composition of coal tar pitch are critical in the production of superior needle coke. Coal-Tar Pitch Composition 269 A. Its composition varies with the process and type of coal used – lignite, bituminous or anthracite. Coal pitch is a complex heterogeneous system of highly condensed carbo- and Coal tar pitch is mainly used as a binder for aluminum smelting electrodes, but is also used in coating surfaces, in roofing materials, to impregnate and strengthen refractory brick and is used to produce pitch coke. Coal tar creosotes and coal tar distillates, oily liquids generally lighter in color and of lower viscosity than coal tar, are fractions produced by additional distillation of crude coal tar. niehs. creosote, coal tar creosote, and coal tar is provided in Tables . Oct 5, 2006 · A coal-tar pitch has been analyzed by a variety of spectroscopic methods. , 2018). Indeed, relations have been found 30 between the solubility of coal tar pitches and the composition of their volatile fraction. 3- Carbores: coal tar pitch (CARBORES® P, CAS NO. Such developments require more and more detailed knowledge of the chemical composition and molecular structure of the pitch. Guillbn et al. The volatile component is not shown separately because it See full list on ntp. [13]Coal tar is a mixture of approximately 10,000 chemicals, of which only about 50% have been identified. : 65996-93-2) with softening point of 110-115°C. Jun 1, 2019 · Coal tar pitch (CTP) is a carbon material produced in large scale as by-product of metallurgic cokes since the first industrial revolution. Coal-Tar Pitch Pyrolysis Behavior 281 A. , 2011), in addition to small particles that are entrained from coking and concentrated in the pitch during tar distillation (Baron et al. gov composition of the pitch [9-11], or to the use of different methods of treatment of the pitch prior to carbonization [12, 13]. 4-1 through 4-3. Coal tar pitch exposure leads to an increased risk of developing skin, lung, bladder, kidney and digestive-tract cancer as well 1. 3.

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