Development, Status, and Prospects of Coal Tar Hydrogenation Technology

Yang, Yuan; Li, Dong; Zhang, Linna; Yu, Zhu; Wang, Lei; Li, Wenhong

doi:10.1002/ente.201600184

Cited by 45 publications

(30 citation statements)

References 27 publications

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“…The >360 • C heavy distillate fraction (distillation residue) accounted for about half mass of the total MLCT, which belongs to coal tar pitch (mainly composed of polycyclic aromatic hydrocarbons), and was the main component of the MLCT. Researches [7,8,36,37] have shown that the >360 • C heavy distillate fraction is exceedingly difficult to hydrogenate and has a low economic value. Figure 3 shows the elemental composition analysis of the narrow distillate fractions.…”

Section: Hydrocarbon-group-type Analysismentioning

confidence: 99%

Investigation on Component Separation and Structure Characterization of Medium-Low Temperature Coal Tar

Zhao

Liu

et al. 2019

Applied Sciences

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Two medium-low temperature coal tars (MLCTs) derived from the pyrolysis of low-grade bituminous coal were separated into 11 narrow fractions by true boiling distillation. The primary property and chemical composition analysis of MLCTs and their distillate narrow fractions were investigated at the macroscopic and molecular level by gas chromatography-mass spectrometer (GC-MS) and proton nuclear magnetic resonance (1H NMR). The two MLCTs show obvious characteristics of medium-low temperature coal tar, including a high H/C, high-oxygen and nitrogen, low-sulfur, low-density, and low viscosity. As the boiling point increases, the molecular weight of each distillate fraction increases continuously. Meanwhile, the yield of each distillate fraction increases gradually, except for the 270–300 °C distillate fractions. The oxygen content in the 170–230 °C distillate fractions is much higher than that of the other distillate fractions. The dominant groups of compounds in the MLCTs were saturates, aromatics, and resins, and the resin content was above 24.5 wt%. The molecular composition of the below 170 °C fractions mainly consists of benzene, toluene, and xylene, and the main phenolic compounds in the 170–230 °C distillate fraction are low-rank phenols, such as phenol, cresol, and xylenol. Although the macroscopic properties of the MLCT-Z and MLCT-S were quite similar, the molecular composition, the group composition and hydrogen distribution in each MLCT and its narrow distillate fractions are still different. The present work has contributed to our present understanding of the composition of MLCTs and to the guiding of the efficient processing of MLCTs.

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Section: Hydrocarbon-group-type Analysismentioning

confidence: 99%

Investigation on Component Separation and Structure Characterization of Medium-Low Temperature Coal Tar

Zhao

Liu

et al. 2019

Applied Sciences

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“…At the same time, they also determine that the system mainly use a peer-to-peer network called the P2P network. The P2P network has the characteristics of decentralization, scalability, and load balancing [4]. These characteristics can conveniently manage the nodes participating in the system's function spreading throughout the world, and therefore they are widely used in the entire blockchain system.…”

Section: Core Networking Modementioning

confidence: 99%

Research and Development of Blockchain Security

Cai¹

2018

IJPE

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Blockchain is a distributed data structure that integrates security, reliability, and centralization. It is the central support technology of the emerging digital encryption currency. With the emergence of Bitcoin, blockchain as its underlying support has begun to attract great attention and has been initially applied in the fields of finance, stocks, and securities. This article briefly describes the classification, architecture, and key technologies of blockchain. At the same time, it briefly analyzes the key management, access control mechanism, DDOS attack defense mechanism, and fragment information leakage prevention mechanism in the blockchain security mechanism. Finally, the prediction of the future development trend of blockchain aims to help further studies on blockchain and its security.

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“…But in the coming decades, fossil fuels will continue to provide more than 85% of global energy consumption. Compared with oil and natural gas, the attraction of coal lies in its abundant reserves and stable prices . Therefore, the efficient use of coal is increasingly paramount to the sustainable development of the world economy and society.…”

Section: Introductionmentioning

confidence: 99%

Effect of coal blending on ash fusion behavior for blast furnace injection of high calcium bituminous coal

Zhang

Wang

et al. 2019

Energy Science & Engineering

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In order to expand the range of bituminous coal injected into blast furnace, the ash melting behavior and regulation mechanism of bituminous with high calcium and low ash fusion temperature (AFT) were investigated by coal blending. And the mineral transformation behavior in the blended ashes was investigated by X-ray powder diffractometry with normalized reference intensity ratio software and FactSage software. The experimental results manifest that the softening temperature (ST) of coal D is 8°C lower than that of the hot blast temperature. By adequately mixing coal B and coal D, it is easy to meet the requirements of pulverized coal injection.And coal D has become a standard bituminous for blast furnace injection. However, the high content of CaO in the coal S ash makes the AFT much lower than the hot blast temperature, which leads to the reluctance of the steel industry to inject coal S.With the increase of coal B mass ratio, the content of high-melting eutectic matters (3Al 2 O 3 ·2SiO 2 and tridymite) increases at high temperature, while the content of low-melting anorthite, andradite, gehlenite, and grossularite decreases, which leads to the increase of AFTs. The variation in the liquid phase under certain conditions reflects the change in AFT. In summary, by blending with coal B, the ST of blended coals S/B is higher than the hot blast temperature (1250°C), so that coal S can be applied to blast furnace injection. And the injection ratio of coal S in blended coals can reach about 50%. K E Y W O R D Sash fusion behavior, coal blending, high calcium bituminous, mineral transformation, thermal properties How to cite this article: Li Y, Zhang J, Wang G, Qiao J, Wang P, Liang W. Effect of coal blending on ash fusion behavior for blast furnace injection of high calcium bituminous coal. Energy Sci Eng.

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Development, Status, and Prospects of Coal Tar Hydrogenation Technology

Cited by 45 publications

References 27 publications

Investigation on Component Separation and Structure Characterization of Medium-Low Temperature Coal Tar

Investigation on Component Separation and Structure Characterization of Medium-Low Temperature Coal Tar

Research and Development of Blockchain Security

Effect of coal blending on ash fusion behavior for blast furnace injection of high calcium bituminous coal

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