Effects of Needle Coke Conductive Additive on the Performance …
Due to the difference in shape and size between the auxiliary conductive filler and flake graphite, the addition of NC particles can easily fill the gap between flake-like graphite and phenolic resin. ... And the optimal GCP-NC−C plate was prepared by wet milling needle coke particles displayed excellent conductivity and flexural strength ...
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Effects of Needle Coke Conductive Additive on …
The needle coke (NC) as a conductive additive was studied on effects of treated by ball milling on the electrical conductivity, mechanical property of the composite plates. All the …
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The optical texture of PGA, Gilsocarbon, NBG-18, and IG-110 …
Fig. 6 (d–f) demonstrates the diversity in the shape of Gilsonite coke. In addition to spherical particles, some of the coke has an irregular shape (Fig. 6 (e)), and Gilsonite coke fragments (Fig. 6 (f)) are also found. ... Needle coke particles observed by optical texture analysis account for 0.6% of the total volume of NBG-18. 5.
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Two Kinds of Coke | FSC 432: Petroleum Refining
There are two kinds of coke produced by delayed coking of VDR: high-density shot coke, and porous sponge coke. Figure 6.7 shows the appearances of shot coke, consisting of aggregates of ~5 mm diameter spherical particles (resembling buckshots) and sponge coke (with a porous structure resembling a sponge). The formation of shot coke is …
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Petroleum Coke
Properties. Petroleum coke is a hard solid petroleum product in black or dark gray, and is characterized by metallic luster and porosity. It is carbon-shaped stuff composed of tiny graphite crystals formed into granules, columns or needles. The composition of petroleum coke is hydrocarbons, containing 90-97% carbon, 1.5-8% hydrogen, and ...
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Influence of coke structure on the properties of the …
The more anisotropic the coke, the more needle-like the shape of the particles11. Such a shape is needed to produce premium electrodes3 and imparts …
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Structural Analysis of Needle Coke
Coke from oil with predominantly paraffin components is characterized by needle struc-ture, contains broad pores of slot type, and consists of long particles. That corresponds to …
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Influence of coke particle characteristics on the
Belitskus [5] confirmed that spherical coke particles pack better than plate-like or needle-like ones, thus even particles with more porosity may result in a higher vibrated bulk density. Sverdlin et al. [6] reported that irregular shape and rough surface of coke particles up to 12 mm prevented the movement in a viscous medium.
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The shape and size of hydroxyapatite particles dictate …
Here we describe the immune responses induced by hydroxyapatite particles of defined sizes and morphologies (Smooth spherical particles with mean size 0.1 μm − S 0.1, Needle-shaped particles ...
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Filterability prediction of needle-like crystals based on particle …
The determination of the two-dimensional particle size and shape distributions of the produced populations has been performed using an ex situ, stereoscopic imaging apparatus, referred to as the flow through cell (FTC) [16], [36]; its schematic representation is shown in Fig. 1.Briefly described, particles flowing through a sapphire …
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Effect of crystallinity and particle size on coke-based …
The particles of pulverized cokes were examined through FE-SEM images, as shown in Fig. 4. The samples were pulverized to sizes of 25–15, 15–10, and 10–2 μm. Regular coke was named C-xxx (xxx representing particle size), and needle coke was named N-xxx. C-coke samples, which come … See more
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Effect of needle‐like crystal shape on measured …
The effect crystal morphology has on measured particle size distributions (PSDs) is explored, with a focus on particles exhibiting a needle-like habit. An idealized in silico study was performed, targeted …
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Effect of coke orientation on the electrochemical
Needle coke and regular coke were selected as raw materials and pulverized to 2–25 μm to determine the effects of crystalline properties on particle shape after pulverization. Needle coke with ...
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The History and Future Challenges of Calcined Petroleum Coke …
GPC has several different structural forms commonly referred to as needle coke, sponge coke, and shot coke. ... Shot coke has a characteristic spherical particle shape and a dense, highly isotropic texture sometimes referred to as a granular texture. Shot coke has a high CTE (>5.5) and typically higher levels of sulfur and trace metal ...
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The effect of particle shape on discharge and clogging
The device for particle-laden fluid flow involves the two-compartment hopper shown in Fig. 2b with an adjustable orifice size to accommodate d o /d ratios between 1.5 and 7.5; the double ...
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Preparation of particle electrodes for landfill
The optimal preparation conditions of the Fe/Cu-NCPE were obtained as Cu 2+-modified needle coke: Fe-based oxides: binder = 32:8:15, particle size of 5 ± 0.5 mm, and Cu 2+ loading of 3 %. The spectral analysis shows that the Fe/Cu-NCPE prepared in this study is a kind of particle electrode with superior performance and good stability.
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Effects of Needle Coke Conductive Additive on the …
Figure 3a shows the surface morphology of the original needle coke NC−A with an average particle size of 250 μm, it can be clearly seen that needle coke is a kind of oval silver gray porous solid …
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Preparation of particle electrodes for landfill leachate …
Preparation of Cu 2+-modified needle coke materials using impregnation and calcination methods [41], and the mass of Cu 2+ in the copper sulfate solution is 3 % of the mass of the needle coke. Iron hydroxide was extracted from iron tailings by acid leaching and alkali recovery, and the Fe-based oxides was obtained by calcining at 500 °C for ...
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Green needle coke-derived porous carbon for high
Moreover, the shape of isotherms also implied that the materials were mainly composed of flaky particles [30], revealing that the original layered structure of needle coke was well preserved after activation, in consistence with the SEM results.
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Accurate size measurement of needle-shaped particles …
Abstract. In this paper, a digital holography based method is proposed to accurately measure the length and orientation of the needle-shaped particles in solution. The method involves recording of the hologram and numerical reconstructions (focusing) of the hologram at several depths. An image analysis routine is then used to determine the ...
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Preparation of particle electrodes for landfill leachate …
@article{Hu2024PreparationOP, title={Preparation of particle electrodes for landfill leachate treatment by doping Cu2+-modified needle coke with Fe-based oxides extracted from iron tailings}, author={Yang Hu and Yanqiu Wang and Lihong Kou and Xinyu Gao and Yixian Wang and Yuting Guo and Xiao Li}, journal={Chemical Engineering …
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Method for Calcined Petroleum Coke Evaluation to …
needle,sponge, and shot coke particles whereas Fig. 5 shows a mix of all three structures present in one particle. Figure 4a shows the anisotropic microstructure of needle coke particles which has large laminar porosities that are wider in the middle and tapering to a point toward the ends. Needle coke particles appear as a cluster of aligned ...
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From needle-like toward equant particles: A controlled crystal shape …
A batch process, in this article referred to as the multistage process, to transform needle-like seed particles into more equant particles was previously modeled and tested experimentally by Salvatori, Mazzotti, 2017, Salvatori, Mazzotti, 2018 and Salvatori et al. (2019). To overcome the common lack of physical actuators for particle …
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(PDF) Effect of needle-like crystal shape on …
Abstract and Figures. The effect crystal morphology has on measured particle size distributions (PSDs) is explored, with a focus on particles exhibiting a needle-like habit. An idealized in silico ...
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Preparation of particle electrodes for landfill leachate …
The optimal preparation conditions of the Fe/Cu-NCPE were obtained as Cu 2+-modified needle coke: Fe-based oxides: binder = 32:8:15, particle size of 5 ± 0.5 mm, and Cu 2+ loading of 3 %. The spectral analysis shows that the Fe/Cu-NCPE prepared in this study is a kind of particle electrode with superior performance and good stability.
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Influence of coke structure on the properties of the carbon …
The more anisotropic the coke, the more needle-like the shape of the particles11. Such a shape is needed to produce premium electrodes3 and imparts desired properties to the log during extrusion and subsequent processing. Particle strength The particle strength of the coke is important as it dictates the type of formulation which can …
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Coking | IntechOpen
2.3.2.1 Process description of fluid coking. Fluid coking is a thermal cracking process consisting of a fluidized bed reactor and a fluidized bed burner. A flow diagram is shown in Figure 5. Vacuum residue is preheated and fed to a scrubber that operates at 370°C above the reactor for coke fine particle recovery.
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Needle Coke | Products | Mitsubishi Chemical …
Needle Coke. Mitsubishi Chemical Corporation. Carbon / Carbon Fibers & Composite Materials. Language. Needle cokes are used as a primary material for graphite electrodes in electric furnace. Coal-based needle …
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Structural Analysis of Needle Coke
crushed coke samples (~3-mm particles) are prepared. An image of the coke particles is obtained in secondary electrons. Analytical samples (particle size <0.2 mm) are pre-pared for X-ray microanalysis. The characteristic X-ray spectra of the samples are recorded from 1-mm 2 sections, with an accelerating voltage of 20 kV and a probe current of ...
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Effects of Needle Coke Conductive Additive on the …
The needle coke (NC) as a conductive additive was studied on effects of treated by ball milling on the electrical conductivity, mechanical property of the composite plates. All the characterizations showed that after ball milling, the NC particles have smaller particle size, and more uniform particle size distribution, which enhanced
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