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<p>Upgrading green syncrude derived from lean-hydrogen syngas into jet fuel-range hydrocarbons requires addressing the challenges posed by oxygenate-rich light fraction. Produced via iron-based Fischer-Tropsch synthesis, this fraction contains alcohols, olefins, paraffins, and other oxygenates, which hinder efficient olefin oligomerization. Using a synthetic mixture mimicking syncrude, we evaluated the effect of oxygenates on ZSM-5 performance and demonstrated the necessity of a dehydration step prior to oligomerization. Pre-oligomerization dehydration enabled stable operation for 100&#xa0;h, whereas residual oxygenates led to reduced ZSM-5 activity, a trend also observed with our syncrude. Increasing the dehydration temperature further enhanced catalyst stability, maintaining high reactivity for 180&#xa0;h.</p>

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Conversion of light fraction of green syncrude in production of synthetic aviation fuel

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年6月1日

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  • Oranit Cohen,
  • Tomy Hos,
  • Miron V. Landau,
  • Moti Herskowitz

摘要

Upgrading green syncrude derived from lean-hydrogen syngas into jet fuel-range hydrocarbons requires addressing the challenges posed by oxygenate-rich light fraction. Produced via iron-based Fischer-Tropsch synthesis, this fraction contains alcohols, olefins, paraffins, and other oxygenates, which hinder efficient olefin oligomerization. Using a synthetic mixture mimicking syncrude, we evaluated the effect of oxygenates on ZSM-5 performance and demonstrated the necessity of a dehydration step prior to oligomerization. Pre-oligomerization dehydration enabled stable operation for 100 h, whereas residual oxygenates led to reduced ZSM-5 activity, a trend also observed with our syncrude. Increasing the dehydration temperature further enhanced catalyst stability, maintaining high reactivity for 180 h.