Zr对Pt-Sn/γ-Al₂O₃脱氢性能的影响

来源期刊：有色金属科学与工程2010年第1期

论文作者：余长林 张彩霞 陈喜蓉 肖友军

文章页码：24 - 26

关键词：丙烷脱氢；丙烯；Pt-Zr-Sn/Al₂O₃

Key words：dehydrogenation; propane; Pt-Zr-Sn/Al₂O₃ catalysts

摘    要：通过H₂-TPR、H₂化学吸附和O₂-脉冲等物理化学表征手段，并结合丙烷脱氢催化性能测试，考察了助剂Zr对Pt-Sn/γ-Al₂O₃催化剂反应性能的影响，结果表明：少量Zr的添加可显著改善Pt-Sn/γ-Al₂O₃，催化剂的脱氢稳定性，同时可提高丙烯选择性，降低催化剂表面积碳量．Zr的存在可能加强了Pt与助剂和载体之间的相互作用，提高Pt粒子抗烧结的能力．

Abstract: This paper studies the effect of Zr addition to Pt-Sn/γ-Al₂O₃ catalyst on the activity, selectivity and deactivation in the propane dehydrogenation. The fresh catalysts were characterized by H₂-TPR, H₂-cheruical adsorption and the amount of deposited carbon on used catalysts was analyzed by 0₂-pulse technology. The results of propane dehydrogenation showed that the addition of Zr to Pt-Sn/γ-Al₂O₃ catalyst can greatly reduce the deactivation rate and increase the selectivity to propene. H₂-TPR experimental showed that the presence of Zr could strengthen the interaction among Pt, promoter and support, which could prevent the Pt particle