WEBMay 1, 2021 · But because that its relative density is higher than and asphaltene content is close to 50% [6] (mass fraction), hightemperature coal tar is not suitable for the production of aerospace fuel. Medium and low temperature coal tar is a liquid product with high condensation degree obtained by pyrolysis of lowrank coal at 600 to 800°C.
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WEBApr 2, 2024 · Ethylene tar (ET) is a byproduct of the industrial production of ethylene from light distillates of ... The preparation process for the ethylenetarderived mesophase pitch was divided into three steps. ... Song, H. Preparation of mesophase pitch from refined coal tar pitch using naphthalenebased mesophase pitch as nucleating agent. Fuel 2019 ...
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WEBAug 30, 2020 · Abstract The refining of coal tar by hydrogenation is considered. In this process, nanoheterogeneous Nibased alysts may expediently be produced in situ from precursors in the reaction medium. The yield of needle coke in complete coal processing with recirculation of the residue at the coking stage is found to be 50–55%. That is .
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WEBDownload scientific diagram | Percentages of BTX, PCX and Naphthalene in coal tar collected under different atmospheres from publiion: Enhanced nearzeroCO2emission chemicalsoriented oil ...
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WEBDec 1, 2018 · Of particular importance is coal tar. Coal is obtained from the process of coal carbonization, and accounts for 2,5–4 wt.% of the feed coal [3], [4]. It allows on the basis of data of coke production to estimate the global coal tar production at the level of 20 millions Mg per year [5], [6]. Coke production capacity in Poland, allow you to ...
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WEBSep 1, 2010 · Tar is an unavoidable waste or a byproduct during biomass thermal conversion process (–20% in biomass gasifiion, main product in biomass pyrolysis) or fossil thermal conversion (coal gasifiion, or liquefaction), whose utilization has an important influence on the efficiency of energy resource. Tar as resource and energy is .
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WEBMost naphthalene is derived from coal tar. From the 1960s until the 1990s, significant amounts of naphthalene were also produced from heavy petroleum fractions during petroleum refining, but today petroleumderived naphthalene represents only a minor component of naphthalene production. Naphthalene is the most abundant single .
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WEBNov 1, 2019 · For a typical CLG process, the OC plays the multifunctional roles for the insitu tar conversion during the syngas production [9] (Fig. 1).From the viewpoint of the metal, the reduced OC could alyze tar for cracking or reforming in gasifiion [11], [12].From the viewpoint of the oxygen, the oxidized OC could provide with lattice oxygen .
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WEBThe results of a rectifiion analysis of the naphthalene fraction of coal tar from the Nizhnetagil'skii Metallurgical Combine make it possible to identify ways of improving the manufacturing process for producing technical grade naphthalene by the rectifiion method. 5 diagrams, 3 tables, 8 references. No Paper Link Available.
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WEBBased on the egory of source, the coal tar segment emerged as the dominant player in the Indian market for Naphthalene in 2023. Coal tar, a valuable byproduct obtained from the process of coal coking, is abundantly available, making it a highly costeffective and sustainable raw material for naphthalene production.
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WEBNov 1, 2021 · Enhanced copyrolysis synergies between cedar and Naomaohu coal volatiles for tar production. Author links open overlay panel Jialong Zhu, Shun ... The results are expected to guide the process optimization for tar production and proper exploitation of the coprocessing technique. ... Naphthalene, : : : .
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WEBThe tar production rate is kg/s and is analyzed to contain 85% carbon and 15% hydrogen by weight. The heating value of the tar is 42,000 kJ/kg. The oxygen is produced from air using an oxygenseparation unit that consumes 4000 kJ of energy/kg of the oxygen produced (assume full conversion of char).
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WEBApr 27, 2024 · The coal tar processing process provides the chemical industry with valuable products: naphthalene, cresol, xylenols, phenol, technical oils and lubricants. The most significant product of coal tar processing is anthracene, which is a raw material for the production of carbon black. The prospects for the implementation of the coal tar .
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WEB3 days ago · The majority of naphthalene comes from coal tar. Significant volumes of naphthalene were created from heavy petroleum fractions during petroleum refining from the 1960s through the 1990s, but petroleumderived naphthalene now accounts for just a small portion of naphthalene production. The most prevalent component of coal tar is .
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WEBIt is a chemical intermediate or feedstock in the synthesis of a large number of derivatives (, phthalic, anthranilic, hydroxy, amino and sulfonyl), compounds used in the production of the coal tar dyes. Naphthalene is produced from coal tar. In the coal tar process, coal tar is processed through a tardistillation step where ...
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WEBarticle{osti_, title = {Process for obtaining sulfur free pure naphthalene from bituminous coal tar and thionaphthene as a byproduct}, author = {Grigoleit, G and Koehler, H and Collin, G and Matern, K}, abstractNote = {In a process for obtaining substantially sulfur free pure naphthalene from bituminous coal tar and .
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WEBMay 1, 2024 · Co‑carbonization of coal tar pitch and brominated industrial methylnaphthalene for the production of isotropic pitchbased carbon fibers with enhanced tensile strength. ... was added as a alyst. The feedstock was subjected to a 6h co‑carbonization process at 350 °C in a flowing nitrogen atmosphere, with nitrogen flow .
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WEBJun 15, 2020 · Naphthalene is the simplest polycyclic aromatic hydrocarbon, and can be used as a precursor to many other complex aromatics. Current industrial processes remove it from coal tar or petroleum during the refining and distillation steps. The process reported here is much greener, albeit on a much smaller scale.
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WEBOct 1, 2022 · Naphthalene is an important component of high temperature coal tar and its content can reach more than 10%. Catalytic polycondensation of naphthalene is an effective way to prepare mesophase pitch and functional carbon materials. ... which may provide valuable hints for exploring the production process of mesophase .
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WEBDec 9, 2012 · Gasifiion is a thermochemical conversion process used to produce syngas through partial oxidation. ... Benefits of ultrasound in pitch production from coal tar and its mixtures with styrene distillation residue ... where X and Y are the number of atoms of carbon and hydrogen in the model hydrocarbon tar (toluene, benzene or .
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WEBNaphthalene produced during the distillation of coal tar is crude in nature. Crude Naphthalene is used in the production of tanning agents, disinfectants etc. It undergoes further fractional distillation to produce some downstream products like sulphonated naphthalene (SNF) and Poly Carboxylate Ether (PCE). PCE is used as a ...
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WEBMar 24, 2017 · The results show that the hydrogenation reaction of phenolic compounds and the hydrogenation reaction of naphthalene in coal tar hydrogenation process are the key factors for the change of coal tar hydrogenation. ... As the reaction pressure increased from 7 to 11 MPa, the production rate of gasoline increased from to %. This ...
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WEBDownload Citation | On Dec 1, 2021, I. I. Melnikov and others published Naphthalene Production by Rectifiion of the Naphthalene Fraction from Coal Tar at MMK | Find, read and cite all the ...
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WEBMay 8, 2019 · Abstract The results of studies on the hydrogenation of a naphthalene fraction of coal tar performed to obtain highgrade sulfurfree naphthalene and highpurity benzene for organic syntheses and to increase the yield of naphthalene due to hydrodemethylation of its homologues from the feedstock are presented. It was .
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WEBDynamic optimal control of coal tar chemical looping gasifiion based on process modelling and intelligent screening. Journal of Cleaner Production (IF ) Pub Date: , DOI: ... Utilisation of coal tar naphthalene oil fractions for the synthesis of valueadded chemicals: alternative paths to mono and dimethylnaphthalenes ...
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WEBAug 1, 2023 · Coal tar is the primary source for many basic chemicals and also provides raw materials for a number of other industries. This paper aims to present a systematic mapping and a brief review of the study areas related to coal tar/pitch over the past 50 years based on a search in the Scopus database.
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WEBMar 18, 2021 · With the rapid development of social economy, the existing crude oil resources can no longer meet the social demand for liquid fuel. It is essential to explore some unconventional fuels as an alternative energy source [1, 2].The most common crude oil substitutes are shale oil, biomass oil and coal tar [3,4,5].Coal tar is a byproduct of .
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WEBIn the process of coaltar distillation, the distillate is collected into four fractions; ... The carbolic acid or naphthalene is generally extracted to be used in other commercial ... it is distilled during the production of water gas. The tar is a byproduct resulting from enrichment of water gas with gases produced by thermal decomposition ...
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WEBNaphthalene, derived from coal tar, is a volatile white solid substance with a unique odor. Accounting for 10% of coal tar, naphthalene is mainly used in the production of plastics, dyes, concrete additive, and moth repellent. ... CSCC produces refined naphthalene through process of refining naphthalene. As one of the leading tar distillers in ...
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WEBMar 22, 2021 · Abstract In this study, the steam reforming of naphthalene and pyrene as heavy tar model compounds was investigated experimentally in a horizontal tube reactor and theoretically using the CHEMKIN simulation. The experimental results revealed that the reactivity of naphthalene was higher than that of pyrene in the presence of steam. The .
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WEBBhilai Cement is India's largest Coal Tar Manufacturers in India and globally. We Manufacturing Exporting Coal tar byproducts include Coal Tar Pitch, Creosote Oil, Naphthalene, Gilsonite, and Furnace Oil, etc at affordable ranges. Between 2022 and 2027, the Coal Tar market is expected to grow at a CAGR of %.
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WEBSep 1, 2023 · Table 1 lists the general properties of the raw material coal tar pitch (CTP) provided by China Steel Chemical Co. It is noteworthy that the QI content of CTP reaches %, which is significantly higher than that of the coal tar pitch commonly used for mesophase pitch preparation [26].Since the QI is mainly composed of thermally .
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