Preparation of Fe-loaded needle coke particle …
Fe-loaded needle coke particle was prepared for use as particle electrode in 3DEF. •. Fe-NCPEs exhibited good hardness, catalytic reaction activity, and …
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 ...
Preparation of Fe-loaded needle coke particle electrodes …
Preparation of Fe-loaded needle coke particle electrodes and utilisation in three-dimensional electro-Fenton oxidation of coking wastewater Hu, Yang; Yu, Fuzhi; Bai, Zhongteng; Wang, Yanqiu; Zhang, Huan ...
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 ...
Effects of Needle Coke Conductive Additive on the Performance …
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 the ...
Effect of crystallinity and particle size on coke-based …
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 …
Influence of particle shape on the rheological behavior …
fraction is higher the more the particle shape differs from a sphere [30], e.g. the higher the aspect ratio r for fibers [31], and prolate, fiber- or needle-like particles yield a higher viscosity than plate-or disk-shaped, oblate particles [30,35]. For concentrated suspen-sions structural order, particleinteractions and number of
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.
(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 ...
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 ...
Applied Sciences | Free Full-Text | Effect of Particle
The pulverized needle coke was not spherical but had a flake shape. Even after being pulverized, the needle coke particles had an anisotropic structure with the same color as the bulk needle coke. Since the needle coke and the binder pitch polymer on those structures were used to manufacture the green blocks, it was expected that a …
Influence of particle shape on the rheological behavior of …
Basically, the viscosity at a given volume fraction is higher the more the particle shape differs from a sphere [30], e.g. the higher the aspect ratio r for fibers [31], and prolate, fiber- or needle-like particles yield a higher viscosity than plate- or disk-shaped, oblate particles [30], [35].
Sustainable production of graphene from petroleum coke …
The economics of possible coke-to-graphene processes are quite striking: needle coke, the highest quality grade of petroleum coke, can be used for electrodes in steel production and can be ...
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 ...
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 ...
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 ...
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 …
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 ...
(PDF) Study of coke by X-ray structural analysis and
Particles of calcined needle coke were formed by lamellae packs, between which there were slit-like pores, and the structure of particles of "raw" coke had an amorphous spongy microstructure.
Structure and Texture of Industrial Coke Samples: A …
A key characteristic is the coke's degree of anisot-ropy [11, 12]. It determined by optical microscope analysis of its particle shape: the score assigned ranges from zero for completely isotropic coke (shot coke) to seven for anisotropic needle coke [13]. High scores correspond to premium-class needle coke, with dis-tinct anisotropy.
(PDF) Study of coke by X-ray structural analysis and …
The differences found in the crystal structure and morphology of coke particles made it possible to divide the studied samples into 2 groups: isotropic, with equal longitudinal and transverse...
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 …
Influence of particle shape on the microstructure evolution …
The aspect ratio (AR), convexity (C) and sphericity (S) proposed by Yang and Altuhafi [1], [28] are adopted to measure the particle shape, referring to Fig. 1 a. The aspect ratio is defined as the ratio between the minimum and maximum Feret diameters, where the Feret diameter of the particle is defined as the measured distance between …
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 …
Preparation of particle electrodes for landfill leachate
X-Ray Diffraction (XRD) results showed that Zn 0.7 Ni 0.15 Cu 0.15 Fe 2 O 4 in the shape of cubic spinel with the main peak at (311). ... Preparation of Fe-loaded needle coke particle electrodes ...
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 ...
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 ...
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 …
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.
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 …
