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

    9 Citations (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

    Keywords

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

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