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Ce对Pt-Sn/Al_2O_3催化剂在H_2/O_2体系中丙烷催化脱氢的影响 被引量:1

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摘要 提出在丙烷临氢催化脱氢过程中引入少量氧,让氧和氢燃烧提供催化脱氢过程所需热量,同时使反应向脱氢方向移动的脱氢过程。脱氢测试表明,在H2/O2体系中催化剂的稳定性最为关键。以Pt-Sn/Ce-γ-Al2O3为催化剂,氧的引入可以显著提高丙烷的转化率、消除积碳、提高催化剂活性和补偿反应所需的部分热量,并获得较高的丙烯收率。积碳定量分析、氢脉冲吸附的测试表明,Ce的存在是维持催化剂稳定性的关键因素,它的存在可以增强Pt粒子抗烧结的能力和稳定催化剂的表面结构,同时还可以通过参与反应提高丙烷脱氢反应速率。
出处 《化工进展》 EI CAS CSCD 北大核心 2009年第S1期118-120,共3页 Chemical Industry and Engineering Progress
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