Structure Analysis of High Strength Coke Using X-ray CT

Estimation of Material Constants of Hot Coke under Inert Atmosphere

“…Regarding the material constants, Young's modulus and Poisson's ratio of coke matrix were set to 24 GPa and 0.3, respectively, in the analysis of the finite element method, 9,10,20) based on the experimental result of nanoindentation measurement. 1,21) The other studies 8,11) used Young's modulus of 95.4-344 GPa or 29.4 GPa and the Poisson's ratio of 0.3 or 0.2. Those studies assumed the coke as elastic material.…”

“…The advancement of analytical technology has enabled identification of the detailed structure and the region of stress concentration through construction of finite ele-ment mesh by image-based modeling using the X-ray CT images. [7][8][9][10][11] With the analysis, Tsafnat et al 7,8) showed apparent stiffness of cokes correlated well with the porosity and three-dimensional structure of the coke matrix. Hiraki et al 9) reported that stronger coke has thicker pore wall.…”

“…The importance of pore wall thickness was also reported for ferro-coke. 10) Anraku et al 11) categorized the coke structure into pores, coke matrix, and dense substrate consisting of minerals, and found that the strength of coke was altered by the coalescence of coke matrix and dense substrate. As such, the relationship between strength and pore structure of coke has been investigated by the techniques and theoretically evaluated.…”

Numerical Simulation of Coal Briquetting Process Using Discrete Element Method

“…T F u ¦ rn t ............................. (5) Here, r is the radius of the particle, and n is a unit normal vector of the contact.…”

“…To improve the strength of coke, many studies have been conducted on its strength and fracture behavior. [1][2][3][4][5] Coke is generally produced by carbonizing caking coal. During heating, caking coal first softens and swells, and then becomes solidified again.…”