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 - Jan 1 1991

Fingerprint

Coke
Needles
Sulfur
Crude oil
Vacuum
Fluid catalytic cracking
Textures
Hexane
Catalysts
Carbonization
Thermal expansion
Alumina
Silica
Oils
Temperature

All Science Journal Classification (ASJC) codes

  • Fuel Technology
  • Energy Engineering and Power Technology

Cite this

Improved Cocarbonization Properties of a Petroleum Vacuum Residue by Catalytic Hydrotreatment Leading to Production of Needle Coke. / Todo, Yoshio; Ohyama, Takashi; Mochida, Isao; Korai, Yozo; Sakanishi, Kinya; Zhao, Xing Zhe.

In: Journal of the Japan Petroleum Institute, Vol. 34, No. 4, 01.01.1991, p. 298-302.

Research output: Contribution to journalArticle

Todo, Yoshio ; Ohyama, Takashi ; Mochida, Isao ; Korai, Yozo ; Sakanishi, Kinya ; Zhao, Xing Zhe. / Improved Cocarbonization Properties of a Petroleum Vacuum Residue by Catalytic Hydrotreatment Leading to Production of Needle Coke. In: Journal of the Japan Petroleum Institute. 1991 ; Vol. 34, No. 4. pp. 298-302.
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