Production of coal tar/petroleum pitch by the combined distillation of coal tar and heavy cycle oil at JSC Gubakhinskii Koks

Andreikov, E. I.; Safarov, L. F.; Tsaur, A. G.; Фризоргер, В. К.; Kochev, L. V.; Savchenko, I. M.

doi:10.3103/s1068364x16030029

Cited by 10 publications

(5 citation statements)

References 2 publications

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“…The resulting PE- co -BrSt copolymer then undergoes Sonogashira cross-coupling reaction, which results in the polyethylene- co -4-phenlyacetylenyl styrene (PE- co -DPA) copolymer(I) with reactive DPA side groups. The reactive PE- co -DPA copolymer is melt-blended with a petroleum pitch that is a mixture of PAH molecules, abundantly produced by petroleum distillation and heavy oil catalytic cracking . Numerous studies have shown that the acetylene “HCCH” moiety is an active dienophile that undergoes a Diels–Alder [2 + 4] thermally induced cycloaddition reaction with the PAH molecule that contains “bay regions” as dienes. − Based on the same principle, the acetylene species within DPA groups can serve as dienophile active sites, thus initiating the same type of cycloaddition reaction with the pitch (PAH) molecules containing bay regions under relatively mild temperature conditions.…”

Section: Resultsmentioning

confidence: 99%

Preparation and Characterization of Polyethylene Copolymers with PAH Side Groups as Carbon Fiber Precursors

Sengeh

Agboola

et al. 2022

ACS Appl. Polym. Mater.

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Polyethylene (PE) has the potential to become a promising carbon fiber (CF) precursor in terms of excellent melt-processibility, high carbon content (>85 wt %), and low material cost. However, the PE polymer is completely degraded at temperatures >480 °C under an inert atmosphere. In this study, we have investigated CF precursors based on a PE-g-PAH graft copolymer with several grafted PAH (polyaromatic hydrocarbons from a petroleum pitch) side groups and some ungrafted (free) pitch molecules that serve as precursors and plasticizers to lower its melt viscosity during melt-spinning. The presence of grafted PAH groups in the PE chain not only enhances the compatibility between the PE-g-PAH copolymer and free pitch molecules in the precursor but also assists in the one-step thermotransformation process to achieve a high C-yield. Thermogravimetric (TGA) analysis, evolved gas analysis mass spectrometry, oscillating rheology, solid-state 13 C NMR, Raman spectroscopy, and X-ray diffraction were employed to monitor melt-processing and thermal transformation. Melt-spinning of this PE-g-PAH/Pitch blend precursor is suitable in the temperature range of 320−340 °C. Thermal transformation, including crosslinking, dehydrogenation of the PE chain, and carbonization, happens stepwise between 350 and 1000 °C under a noble gas atmosphere. Compared with the corresponding petroleum pitch, this PE-g-PAH/Pitch blend precursor exhibits a higher carbon yield (>70%) at 1000 °C. The resulting carbon derived from this precursor (without tension) at 1100 °C shows a similar d-spacing and stacking height but a higher lateral size compared to those typically observed in PAN-based carbon fibers. Overall, the discovery of this PE-g-PAH/Pitch precursor potentially provides an alternative strategy for preparing carbon fibers with a lower cost, less energy consumption, and easier handling throughout the entire production process.

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Section: Resultsmentioning

confidence: 99%

Preparation and Characterization of Polyethylene Copolymers with PAH Side Groups as Carbon Fiber Precursors

Sengeh

Agboola

et al. 2022

ACS Appl. Polym. Mater.

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“…First, we calculated the packing density of the GF mixtures with particle sizes ranging between 50 and 500 μm, resulting in the highest packing fraction (0.95) at small‐sized GFs and 22 wt% GF. In terms of the GBs, if the space without GFs is completely filled by pitch binders, the bulk density is calculated by adding the packing fraction of the theoretical density of the natural GF (2.24 g cm −3 ) and pitch binder (1.05 g cm −3 ) 31 . The results of the bulk density of bimodal particle size distribution with the pitch binder as a function of various small‐sized GF contents are shown in Figure 2.…”

Section: Resultsmentioning

confidence: 99%

Properties of graphite blocks consisting of ordered graphite flakes with bimodal particle size distribution

Lee

Kim

et al. 2021

Engineering Reports

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Petroleum pitch‐based graphite blocks (GBs) attract considerable attention owing to their low cost, high yield, and possible application as heat sink components. However, no studies have systematically investigated the particle size distribution of GBs, their structures, and the relationship between the structures and thermal properties resulting from graphitization. Hence, herein, we present a novel method for fabricating petroleum pitch‐based GBs using natural graphite flakes (GFs) of sizes ranging between 50 and 500 μm and a bimodal particle size distribution. Furthermore, the effects of the mean GF particle size, pitch binder content, and microstructure of the GBs with low GF contents on compression molding with elevated hot‐pressing temperatures after graphitization are investigated. To investigate the effect of packing density with a GF size of 500 μm, we mix a small‐sized GF (50 μm) and low pitch binder content by kneading. In particular, specimens in the in‐plane direction with a bimodal particle size distribution of GFs and 10 wt% pitch binder yield optimum density and thermal conductivity values of 1.74 g m−3 and 384 Wm−1 K−1, respectively, after high‐temperature graphitization at 2600°C. These findings provide insights for developing high‐performance GBs for use in heat sink components with high thermal conductivity.

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“…Свойства УВ во многом определяются составом использованного пека, так, например для получения волокон с улучшенными параметра-ми, изотропный пек (каменноугольный и нефтяной) должен быть преобразован в мезофазный пек содержащий как анизотропную фазу так и графитовую структуру [32]. Для получения мезофазного пека используют различные методы такие как, пиролиз [33], дистилляция [34], экстракция растворителем [35] или катализатором [36]. Полученные волокна-предшественники из мезофазного пека подвергаются термостабилизации и карбонизации при высоких температурах [30].…”

Section: углеродные волокнаunclassified

Пути Комплексной Переработки Углей

Имаш¹,

Кайдар²,

Жуматаев³

et al. 2021

Горение и Плазмохимия

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Казахстан является важным мировым игроком в сфере добычи и экспорта угля на мировом рынке. На протяжении многих лет уголь является важным энергетическим ресурсом, однако развитие нанотехнологии и совершенствование существующих технологии глубокой переработки сырья, позволяют взглянуть на уголь не только как на энергетический ресурс, но и как на источник производства пористых углеродных материалов и извлечения редкоземельных элементов. Высокий спрос на редкие земли обратил взор исследователей на угольные ресурсы, как на потенциальный источник, особенно это касается высокозольных и низкосортных углей. В работе рассмотрены методы извлечения редких земель из угля и продуктов его переработки с применением кислотной, щелочной и солевой обработки. Показаны недостатки и преимущества каждого из методов. Также в работе были показаны современные пути комплексной переработки угля для получения пористых углеродных материалов, в виде активированных углей и наноуглеродного материала. Показано, что, применяя методы химической и физической активации можно получить пористые материалы с развитой удельной поверхностью и различным соотношением мезо-, микро- и макропор. Таким образом, рассмотрены новые пути переработки угля для получения новых функциональных материалов.

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Production of coal tar/petroleum pitch by the combined distillation of coal tar and heavy cycle oil at JSC Gubakhinskii Koks

Cited by 10 publications

References 2 publications

Preparation and Characterization of Polyethylene Copolymers with PAH Side Groups as Carbon Fiber Precursors

Preparation and Characterization of Polyethylene Copolymers with PAH Side Groups as Carbon Fiber Precursors

Properties of graphite blocks consisting of ordered graphite flakes with bimodal particle size distribution

Пути Комплексной Переработки Углей

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