Improved Cocarbonization Properties of a Petroleum Vacuum Residue by Catalytic Hydrotreatment Leading to Production of Needle Coke.

Yoshio Todo, Takashi Ohyama, Isao Mochida, Yozo Korai, Kinya Sakanishi, Xing Zhe Zhao

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Catalytic hydrotreatment of a petroleum low sulfur vacuum residue (LSVR) was studied to improve its carbonization properties since the residue gave bottom mosaic texture in a lump needle coke when it was cocarbonized with a particular paraffinic fluid catalytic cracking decant oil (FCC-DO). A Ni-Mo/ Silica-Alumina catalyst designed for residual oils converted completely the asphaltene fraction in LSVR so as to be soluble in hexane at 400° under 15MPa H2. Excellent needle coke without bottom mosaic texture was produced from the hydrotreated LSVR via cocarbonization with FCC-DO at 480°. Another catalyst for the heavy distillate left some amount of hexane insoluble asphaltene fraction, although it was certainly depolymerized. Such a hydrotreated LSVR produced still a little but distinct amount of mosaic texture. The cocarbonization at 490° provided a smaller value of CTE (coefficient of thermal expansion) to the lump coke than that at 480°. The hydrotreatment reduces the reactivity of VR, raising slightly the optimum cocarbonization temperature.

Original languageEnglish
Pages (from-to)298-302
Number of pages5
Journaljournal of the japan petroleum institute
Volume34
Issue number4
DOIs
Publication statusPublished - 1991

All Science Journal Classification (ASJC) codes

  • Fuel Technology
  • Energy Engineering and Power Technology

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