A study of the carbonization of ethylene tar pitch and needle coke formation

Isao Mochida, You Qing Fei, Yozo Korai

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Carbonization of ethylene tar pitch (ETP) and its hydrogenated products was studied in a tube bomb to find the appropriate carbonization conditions for producing a good needle coke. At the relatively low temperature of 460 °C under a pressure of 784 kPa for 10 h, ETP produced lump coke of low CTE and of excellent flow texture without any mosaic coke being formed at the bottom of the reactor (bottom mosaic coke). A higher carbonization temperature (480 °C) gave a mosaic texture coke of large CTE, although the carbonization was complete in 6 h. A lower carbonization temperature (440 °C) or pressures above 784 kPa resulted in bottom mosaic coke. The catalytic hydrogenation of ETP improved the anisotropic texture of coke carbonization at 480 °C, but could not eliminate the mosaic coke forming at the reactor bottom. N.m.r. and g.p.c. analysis revealed that ETP contained some olefins and high molecular weight substances in the major 2-3 ring aromatic hydrocarbons. The roles of such minor components in the formation of needle and mosaic cokes are discussed.

Original languageEnglish
Pages (from-to)667-671
Number of pages5
JournalFuel
Volume69
Issue number6
DOIs
Publication statusPublished - Jun 1990

Fingerprint

Tar
Carbonization
Coke
Needles
Ethylene
Textures
Aromatic Hydrocarbons
Carbon
ethylene
rosin
Aromatic hydrocarbons
Alkenes
Temperature
Olefins
Hydrogenation
Molecular weight

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Organic Chemistry

Cite this

A study of the carbonization of ethylene tar pitch and needle coke formation. / Mochida, Isao; Fei, You Qing; Korai, Yozo.

In: Fuel, Vol. 69, No. 6, 06.1990, p. 667-671.

Research output: Contribution to journalArticle

Mochida, Isao ; Fei, You Qing ; Korai, Yozo. / A study of the carbonization of ethylene tar pitch and needle coke formation. In: Fuel. 1990 ; Vol. 69, No. 6. pp. 667-671.
@article{87fa73833a2349509d1e959a607e6541,
title = "A study of the carbonization of ethylene tar pitch and needle coke formation",
abstract = "Carbonization of ethylene tar pitch (ETP) and its hydrogenated products was studied in a tube bomb to find the appropriate carbonization conditions for producing a good needle coke. At the relatively low temperature of 460 °C under a pressure of 784 kPa for 10 h, ETP produced lump coke of low CTE and of excellent flow texture without any mosaic coke being formed at the bottom of the reactor (bottom mosaic coke). A higher carbonization temperature (480 °C) gave a mosaic texture coke of large CTE, although the carbonization was complete in 6 h. A lower carbonization temperature (440 °C) or pressures above 784 kPa resulted in bottom mosaic coke. The catalytic hydrogenation of ETP improved the anisotropic texture of coke carbonization at 480 °C, but could not eliminate the mosaic coke forming at the reactor bottom. N.m.r. and g.p.c. analysis revealed that ETP contained some olefins and high molecular weight substances in the major 2-3 ring aromatic hydrocarbons. The roles of such minor components in the formation of needle and mosaic cokes are discussed.",
author = "Isao Mochida and Fei, {You Qing} and Yozo Korai",
year = "1990",
month = "6",
doi = "10.1016/0016-2361(90)90026-M",
language = "English",
volume = "69",
pages = "667--671",
journal = "Fuel",
issn = "0016-2361",
publisher = "Elsevier BV",
number = "6",

}

TY - JOUR

T1 - A study of the carbonization of ethylene tar pitch and needle coke formation

AU - Mochida, Isao

AU - Fei, You Qing

AU - Korai, Yozo

PY - 1990/6

Y1 - 1990/6

N2 - Carbonization of ethylene tar pitch (ETP) and its hydrogenated products was studied in a tube bomb to find the appropriate carbonization conditions for producing a good needle coke. At the relatively low temperature of 460 °C under a pressure of 784 kPa for 10 h, ETP produced lump coke of low CTE and of excellent flow texture without any mosaic coke being formed at the bottom of the reactor (bottom mosaic coke). A higher carbonization temperature (480 °C) gave a mosaic texture coke of large CTE, although the carbonization was complete in 6 h. A lower carbonization temperature (440 °C) or pressures above 784 kPa resulted in bottom mosaic coke. The catalytic hydrogenation of ETP improved the anisotropic texture of coke carbonization at 480 °C, but could not eliminate the mosaic coke forming at the reactor bottom. N.m.r. and g.p.c. analysis revealed that ETP contained some olefins and high molecular weight substances in the major 2-3 ring aromatic hydrocarbons. The roles of such minor components in the formation of needle and mosaic cokes are discussed.

AB - Carbonization of ethylene tar pitch (ETP) and its hydrogenated products was studied in a tube bomb to find the appropriate carbonization conditions for producing a good needle coke. At the relatively low temperature of 460 °C under a pressure of 784 kPa for 10 h, ETP produced lump coke of low CTE and of excellent flow texture without any mosaic coke being formed at the bottom of the reactor (bottom mosaic coke). A higher carbonization temperature (480 °C) gave a mosaic texture coke of large CTE, although the carbonization was complete in 6 h. A lower carbonization temperature (440 °C) or pressures above 784 kPa resulted in bottom mosaic coke. The catalytic hydrogenation of ETP improved the anisotropic texture of coke carbonization at 480 °C, but could not eliminate the mosaic coke forming at the reactor bottom. N.m.r. and g.p.c. analysis revealed that ETP contained some olefins and high molecular weight substances in the major 2-3 ring aromatic hydrocarbons. The roles of such minor components in the formation of needle and mosaic cokes are discussed.

UR - http://www.scopus.com/inward/record.url?scp=0025445571&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0025445571&partnerID=8YFLogxK

U2 - 10.1016/0016-2361(90)90026-M

DO - 10.1016/0016-2361(90)90026-M

M3 - Article

AN - SCOPUS:0025445571

VL - 69

SP - 667

EP - 671

JO - Fuel

JF - Fuel

SN - 0016-2361

IS - 6

ER -