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Abstract <p>This study investigates ammonia decomposition over a series of cobalt/silica gel catalysts with the loading of active metal varying from 2.1 to 32.4 wt %. The reaction was conducted in a continuous-flow reactor at temperatures between 400 and 550°C and a weight hour space velocity (WHSV) of 3000 h<sup>–1</sup>. The catalysts were characterized using transmission electron microscopy (TEM), scanning electron microscopy (SEM), X–ray diffraction analysis (XRD), multimolecular Brunauer–Emmett–Teller (BET) adsorption, and hydrogen temperature-programmed reduction (H<sub>2</sub>-TPR). The results demonstrate that catalytic activity is dependent on cobalt content, with an optimal loading of 15–20 wt % providing the highest catalytic performance.</p>

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The Effects of Cobalt Content on the Activity of Co/SiO2 Catalysts for Ammonia Decomposition

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • R. E. Yakovenko,
  • T. V. Krasnyakova,
  • A. N. Saliev,
  • V. N. Soromotin,
  • A. V. Volik,
  • A. P. Savostyanov,
  • S. A. Mitchenko

摘要

Abstract

This study investigates ammonia decomposition over a series of cobalt/silica gel catalysts with the loading of active metal varying from 2.1 to 32.4 wt %. The reaction was conducted in a continuous-flow reactor at temperatures between 400 and 550°C and a weight hour space velocity (WHSV) of 3000 h–1. The catalysts were characterized using transmission electron microscopy (TEM), scanning electron microscopy (SEM), X–ray diffraction analysis (XRD), multimolecular Brunauer–Emmett–Teller (BET) adsorption, and hydrogen temperature-programmed reduction (H2-TPR). The results demonstrate that catalytic activity is dependent on cobalt content, with an optimal loading of 15–20 wt % providing the highest catalytic performance.