Thermo-Physical Properties of Petroleum Coke during Calcining Graphitization Process

Long, Mujun; Sheng, Junhao; Liu, Tao; Chen, Dengfu; Yang, Yi; Gong, Shengkai; Chen, Chunmei

doi:10.1007/978-3-319-48245-3_24

Cited by 1 publication

(1 citation statement)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a cheap carbon source, green petroleum coke is produced from the heavy residual fractions of petroleum or crude oil using a process known as delayed coking. − Calcined petroleum coke, which is the main raw material for carbon products, is produced from green petroleum coke using the calcination process. − Currently, crude oil sources that contain higher sulfur contents and metal impurity levels compared with previous sources are being used frequently to produce green petroleum coke, which gives final green petroleum coke with higher sulfur content and metal impurities. , Previous studies − have shown that additional sulfur removal during calcination leads to an increase in microporosity, which usually has a negative influence on the true density of coke. Therefore, higher sulfur levels in petroleum cokes have a greater effect on the quality of carbon products.…”

Section: Introductionmentioning

confidence: 99%

Variations in the True Density and Sulfur Removal Forms of Petroleum Coke during an Ultrahigh-Temperature Desulfurization Process

et al. 2017

Self Cite

View full text Add to dashboard Cite

To investigate the variation of true density and the sulfur removal forms during the ultrahigh-thermal desulfurization process, two types of delayed petroleum cokes with different sulfur contents were calcined at temperatures up to 2500 °C at two distinct heating rates. The influence of the desulfurization coefficient on the true density growth was quantitatively discussed. Additionally, the removal forms of sulfur in petroleum cokes during thermal desulfurization were also investigated through a series of thermodynamic calculations. The results revealed a continuous increase in the true density with the uninterrupted release of sulfur during thermal desulfurization, and a maximum true density of 2.3 g/cm3 was obtained at a temperature of 2500 °C. The growth rate of the true density was dependent on the desulfurization coefficient of the petroleum cokes. The relationship between the true density growth rate and the desulfurization coefficient during thermal desulfurization was an exponential function, which can be presented as γTD = −117 × 10–5 exp(−104βD–S/1.45) + 9.07 × 10–5. Furthermore, the calculated results indicated that gaseous elemental sulfur (S2) was released by the pyrogenic decomposition of ferrous disulfide into inorganic sulfur. Organic sulfur was initially degraded into H2S and SO2 through thiophene decomposition, and then free COS, S2, and CS2 were released via a carbon reduction reaction.

show abstract