Scholarlink

<p>Selective propane dehydrogenation is one of the commercialized technologies for the production of propylene and hydrogen. Here, alkaline (K) modified Pt-Sn /γ-Al<sub>2</sub>O<sub>3</sub> catalysts were prepared via sequential incipient wetness impregnation method for the propane dehydrogenation reaction. They were characterized by BET, TEM, TPR, TPD-NH<sub>3</sub>, CO-dispersion, and TPO analysis’s. The catalytic performance towards propane dehydrogenation was assessed at an hourly gas space velocity of 10,000 cm<sup>3</sup> (g.cat)<sup>−1</sup> h<sup>− 1</sup> at 580&#xa0;°C up to 5&#xa0;h time on stream at an absolute pressure of 1&#xa0;bar. Results showed that the parent Pt-Sn/γ-Al<sub>2</sub>O<sub>3</sub> catalyst exhibits 54.2% propane conversion at 580&#xa0;°C with a poor selectivity towards propylene of 83.8%. Incorporation of K element generally increased selectivity towards propylene and decreased propane conversion. For a constant Pt and Sn content of 0.4 and 0.8 wt%, respectively, different catalysts with a K element content of 0.0, 0.3, 0.8, 1.5 and 2.5 wt% were synthesized. Optimal catalytic performance was observed for a 0.8 wt% K element content. Compared to the Pt-Sn/γ-Al<sub>2</sub>O<sub>3</sub> sample, the optimum catalyst resulted in a 48.2% increase in propylene yield and a minimal decrease of only 3.6% in propane conversion.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Influence of Potassium on Coke Formation and Catalytic Stability in the Propane Dehydrogenation Reaction Over Alkaline Modified Pt-Sn / γ-Al2O3

  • 期刊论文

  • 发表日期：

    2025年6月20日

查看全文
  • Ghasem Kasaeian,
  • Cavus Falamaki,
  • Mehrdad Mozaffariana

摘要

Selective propane dehydrogenation is one of the commercialized technologies for the production of propylene and hydrogen. Here, alkaline (K) modified Pt-Sn /γ-Al2O3 catalysts were prepared via sequential incipient wetness impregnation method for the propane dehydrogenation reaction. They were characterized by BET, TEM, TPR, TPD-NH3, CO-dispersion, and TPO analysis’s. The catalytic performance towards propane dehydrogenation was assessed at an hourly gas space velocity of 10,000 cm3 (g.cat)−1 h− 1 at 580 °C up to 5 h time on stream at an absolute pressure of 1 bar. Results showed that the parent Pt-Sn/γ-Al2O3 catalyst exhibits 54.2% propane conversion at 580 °C with a poor selectivity towards propylene of 83.8%. Incorporation of K element generally increased selectivity towards propylene and decreased propane conversion. For a constant Pt and Sn content of 0.4 and 0.8 wt%, respectively, different catalysts with a K element content of 0.0, 0.3, 0.8, 1.5 and 2.5 wt% were synthesized. Optimal catalytic performance was observed for a 0.8 wt% K element content. Compared to the Pt-Sn/γ-Al2O3 sample, the optimum catalyst resulted in a 48.2% increase in propylene yield and a minimal decrease of only 3.6% in propane conversion.