Effect of H2S and thiophene on the steam reforming activity of nickel and rhodium catalysts in a simulated coke oven gas stream

Asbel David Hernandez, Noora Kaisalo, Pekka Simell, Marco Scarsella

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

In the present work the impact of H2S and thiophene on the steam reforming and water-gas shift (WGS) reactions were studied. The activity of three catalysts i.e. Ni/Al2O3, Ni/mayenite and Rh/Al2O3 was evaluated using an atmospheric fixed-bed lab-scale quartz reactor. A simulated coke oven gas (COG) stream was fed to the reactor. The temperature range studied was 675–900 °C. It was found that the temperature had a significant influence on the degree of poisoning of the catalysts and thus their performance. Regeneration of benzene reforming activity of the poisoned Ni/Al2O3 was achieved after exposing the catalyst to up to 200 ppm of H2S. Rh/Al2O3 outperformed the nickel catalysts in the steam reforming of benzene in the presence of thiophene. Ni/mayenite was the only catalyst able to maintain a noticeable WGS activity in the presence of H2S this result was attributed to the presence of CaO on the surface of this catalyst.

Original languageEnglish
Article number117977
JournalApplied Catalysis B: Environmental
Volume258
DOIs
Publication statusPublished - Dec 2019
MoE publication typeA1 Journal article-refereed

Fingerprint

rhodium
Thiophenes
Coke ovens
Rhodium
Steam reforming
Thiophene
Nickel
nickel
Gases
catalyst
Catalysts
gas
Water gas shift
Benzene
benzene
Catalyst poisoning
Quartz
Reforming reactions
poisoning
coke

Keywords

  • Catalytic steam reforming
  • Coke oven gas
  • Sulfur poisoning
  • Water-gas shift

Cite this

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title = "Effect of H2S and thiophene on the steam reforming activity of nickel and rhodium catalysts in a simulated coke oven gas stream",
abstract = "In the present work the impact of H2S and thiophene on the steam reforming and water-gas shift (WGS) reactions were studied. The activity of three catalysts i.e. Ni/Al2O3, Ni/mayenite and Rh/Al2O3 was evaluated using an atmospheric fixed-bed lab-scale quartz reactor. A simulated coke oven gas (COG) stream was fed to the reactor. The temperature range studied was 675–900 °C. It was found that the temperature had a significant influence on the degree of poisoning of the catalysts and thus their performance. Regeneration of benzene reforming activity of the poisoned Ni/Al2O3 was achieved after exposing the catalyst to up to 200 ppm of H2S. Rh/Al2O3 outperformed the nickel catalysts in the steam reforming of benzene in the presence of thiophene. Ni/mayenite was the only catalyst able to maintain a noticeable WGS activity in the presence of H2S this result was attributed to the presence of CaO on the surface of this catalyst.",
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Effect of H2S and thiophene on the steam reforming activity of nickel and rhodium catalysts in a simulated coke oven gas stream. / Hernandez, Asbel David; Kaisalo, Noora; Simell, Pekka; Scarsella, Marco.

In: Applied Catalysis B: Environmental, Vol. 258, 117977, 12.2019.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Scarsella, Marco

PY - 2019/12

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AB - In the present work the impact of H2S and thiophene on the steam reforming and water-gas shift (WGS) reactions were studied. The activity of three catalysts i.e. Ni/Al2O3, Ni/mayenite and Rh/Al2O3 was evaluated using an atmospheric fixed-bed lab-scale quartz reactor. A simulated coke oven gas (COG) stream was fed to the reactor. The temperature range studied was 675–900 °C. It was found that the temperature had a significant influence on the degree of poisoning of the catalysts and thus their performance. Regeneration of benzene reforming activity of the poisoned Ni/Al2O3 was achieved after exposing the catalyst to up to 200 ppm of H2S. Rh/Al2O3 outperformed the nickel catalysts in the steam reforming of benzene in the presence of thiophene. Ni/mayenite was the only catalyst able to maintain a noticeable WGS activity in the presence of H2S this result was attributed to the presence of CaO on the surface of this catalyst.

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