Supported iron catalysts for slurry phase Fischer-Tropsch synthesis

Dragomir B. Bukur, Chokkaram Sivaraj

Research output: Contribution to journalArticle

93 Citations (Scopus)

Abstract

The present study was undertaken to investigate reduction and catalytic behavior of silica and alumina-supported iron Fischer-Tropsch (F-T) catalysts promoted with potassium and copper. It was found that the alumina (Vista Catapal B) inhibits reduction of iron, whereas the reduction behavior of the silica (Davison Grade 952) supported catalyst was similar to that of the two precipitated iron catalysts synthesized in our laboratory. Supported and precipitated (Fe/Cu/K/SiO2) catalysts were tested in a stirred tank slurry reactor. Initial activity of the silica-supported catalyst, measured by a value of an apparent first-order reaction rate constant, was 20-40% higher than that of the precipitated iron catalysts, whereas the activity of the alumina-supported catalyst was about 50% less than that of the silica-supported catalyst. Silica-supported catalyst had higher gaseous selectivity and lower olefin content than the alumina-supported catalyst and precipitated catalysts. These results were explained in terms of interactions between potassium with supports, resulting in reduction of the potassium promotion effectiveness.

Original languageEnglish
Pages (from-to)201-214
Number of pages14
JournalApplied Catalysis A: General
Volume231
Issue number1-2
DOIs
Publication statusPublished - 10 May 2002
Externally publishedYes

Fingerprint

Fischer-Tropsch synthesis
Catalyst supports
slurry
Silicon Dioxide
Iron
Aluminum Oxide
catalyst
iron
Silica
Catalysts
Alumina
Potassium
silica
aluminum oxide
potassium
Catalyst selectivity
Alkenes
Olefins
Reaction rates
Copper

Keywords

  • Fischer-Tropsch synthesis
  • Isothermal reduction behavior
  • Slurry reactor
  • Supported and precipitated iron catalysts
  • TPR characterization

ASJC Scopus subject areas

  • Catalysis
  • Environmental Science(all)
  • Process Chemistry and Technology

Cite this

Supported iron catalysts for slurry phase Fischer-Tropsch synthesis. / Bukur, Dragomir B.; Sivaraj, Chokkaram.

In: Applied Catalysis A: General, Vol. 231, No. 1-2, 10.05.2002, p. 201-214.

Research output: Contribution to journalArticle

@article{22f19d792fed449e9bd1bd934dffc3dd,
title = "Supported iron catalysts for slurry phase Fischer-Tropsch synthesis",
abstract = "The present study was undertaken to investigate reduction and catalytic behavior of silica and alumina-supported iron Fischer-Tropsch (F-T) catalysts promoted with potassium and copper. It was found that the alumina (Vista Catapal B) inhibits reduction of iron, whereas the reduction behavior of the silica (Davison Grade 952) supported catalyst was similar to that of the two precipitated iron catalysts synthesized in our laboratory. Supported and precipitated (Fe/Cu/K/SiO2) catalysts were tested in a stirred tank slurry reactor. Initial activity of the silica-supported catalyst, measured by a value of an apparent first-order reaction rate constant, was 20-40{\%} higher than that of the precipitated iron catalysts, whereas the activity of the alumina-supported catalyst was about 50{\%} less than that of the silica-supported catalyst. Silica-supported catalyst had higher gaseous selectivity and lower olefin content than the alumina-supported catalyst and precipitated catalysts. These results were explained in terms of interactions between potassium with supports, resulting in reduction of the potassium promotion effectiveness.",
keywords = "Fischer-Tropsch synthesis, Isothermal reduction behavior, Slurry reactor, Supported and precipitated iron catalysts, TPR characterization",
author = "Bukur, {Dragomir B.} and Chokkaram Sivaraj",
year = "2002",
month = "5",
day = "10",
doi = "10.1016/S0926-860X(02)00053-4",
language = "English",
volume = "231",
pages = "201--214",
journal = "Applied Catalysis A: General",
issn = "0926-860X",
publisher = "Elsevier",
number = "1-2",

}

TY - JOUR

T1 - Supported iron catalysts for slurry phase Fischer-Tropsch synthesis

AU - Bukur, Dragomir B.

AU - Sivaraj, Chokkaram

PY - 2002/5/10

Y1 - 2002/5/10

N2 - The present study was undertaken to investigate reduction and catalytic behavior of silica and alumina-supported iron Fischer-Tropsch (F-T) catalysts promoted with potassium and copper. It was found that the alumina (Vista Catapal B) inhibits reduction of iron, whereas the reduction behavior of the silica (Davison Grade 952) supported catalyst was similar to that of the two precipitated iron catalysts synthesized in our laboratory. Supported and precipitated (Fe/Cu/K/SiO2) catalysts were tested in a stirred tank slurry reactor. Initial activity of the silica-supported catalyst, measured by a value of an apparent first-order reaction rate constant, was 20-40% higher than that of the precipitated iron catalysts, whereas the activity of the alumina-supported catalyst was about 50% less than that of the silica-supported catalyst. Silica-supported catalyst had higher gaseous selectivity and lower olefin content than the alumina-supported catalyst and precipitated catalysts. These results were explained in terms of interactions between potassium with supports, resulting in reduction of the potassium promotion effectiveness.

AB - The present study was undertaken to investigate reduction and catalytic behavior of silica and alumina-supported iron Fischer-Tropsch (F-T) catalysts promoted with potassium and copper. It was found that the alumina (Vista Catapal B) inhibits reduction of iron, whereas the reduction behavior of the silica (Davison Grade 952) supported catalyst was similar to that of the two precipitated iron catalysts synthesized in our laboratory. Supported and precipitated (Fe/Cu/K/SiO2) catalysts were tested in a stirred tank slurry reactor. Initial activity of the silica-supported catalyst, measured by a value of an apparent first-order reaction rate constant, was 20-40% higher than that of the precipitated iron catalysts, whereas the activity of the alumina-supported catalyst was about 50% less than that of the silica-supported catalyst. Silica-supported catalyst had higher gaseous selectivity and lower olefin content than the alumina-supported catalyst and precipitated catalysts. These results were explained in terms of interactions between potassium with supports, resulting in reduction of the potassium promotion effectiveness.

KW - Fischer-Tropsch synthesis

KW - Isothermal reduction behavior

KW - Slurry reactor

KW - Supported and precipitated iron catalysts

KW - TPR characterization

UR - http://www.scopus.com/inward/record.url?scp=0037052303&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0037052303&partnerID=8YFLogxK

U2 - 10.1016/S0926-860X(02)00053-4

DO - 10.1016/S0926-860X(02)00053-4

M3 - Article

VL - 231

SP - 201

EP - 214

JO - Applied Catalysis A: General

JF - Applied Catalysis A: General

SN - 0926-860X

IS - 1-2

ER -