Preparation and Characterization of Mesophase Pitch via Co-Carbonization of Waste Polyethylene/Petroleum Pitch

Obtaining of high density carbon materials by coke sintering resulting from heat treatment of tar for applications in sensors manufacture

“…However, comparing the results for C330-1-1.5 and C330-3-3 in Table 2, the flexural strength of C330-3-3 is better. This result maybe is due to the occurrence of small cracks that could reduce the flexural strength for carbon blocks when the volatile matter is evaporated in the temperature range of 650-1100°C and the degree of volume shrinkage decreased, these results being in agreement with other studies (Cheng et al, 2015;Cheng et al, 2013). Figure 4 shows the optimum conditions for the first stage of treatment to manufacture high density carbon blocks based on the weight losses and volume shrinkages of C310-1-1.5, C330-1-1.5 and C365-1-1.5 samples.…”

“…In this processes the important factors are the coke types and the mixing ratio of coke and binder, but at the same time, to obtain high density blocks of graphite, the steps of impregnation, drying and calcination need to be repeated, and this represents a critical problem because to repeat the impregnation and calcination processes can increase the manufacturing costs and time. In order to eliminate these deficiencies, many studies were achieved to investigate other advanced methods, such as using of mesophase powder (Li et al, 2011;Zhao et al, 2013;Cheng et al, 2015), mesoporous carbon microbeads (MCMB) (Fang et al, 2015;Shen et al, 2011), self-sintering coke (Kocaefe et al, 2016), or adding a sintering agent (Shen et al, 2013).…”

Preparation and characterization of petroleum-based mesophase pitch by thermal condensation with in-process hydrogenation

“…This demonstrated that the three products all possessed initial crystal forms. 33,35 The parameters L c , M e and O g of the three products increased in the order: N 1 -MP < N 2 -MP < N 3 -MP, while the d 002 increased in the reverse order (presented in Table 7). This suggested that crystal structures of the three products were increasingly improved.…”

“…The soening points (SP) of intermediate and mesophase pitch were measured by the ring-and-ball method (ASTM D3461standard) and penetrometer method. 33 The polarized structures of products were obtained on a XP-1500 polarizing microscope made by the Milite Company. The products were characterized by an inVia Raman spectrometer (Renishaw Company) at 75 mW laser power with Ar monochromatic light source as excitation source (l ¼ 633 nm).…”

Manufacture of high density carbon blocks by self-sintering coke produced via a two-stage heat treatment of coal tar

“…At the same time, to manufacture high-density artificial graphite blocks, the impregnation and calcination steps need to be repeated, which is a critical problem because the repeated impregnation and calcination processes can dramatically increase manufacturing costs and time. To address those shortcomings, many researchers have investigated several advanced methods, such as using mesocarbon microbeads (MCMB) [ 11 , 12 , 13 ], utilizing self-sintering coke [ 14 , 15 ], adding a sintering agent [16] , and using mesophase powders [ 17 , 18 , 19 ].…”