论文部分内容阅读
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。
It is proposed that a small amount of oxygen should be introduced during the catalytic dehydrogenation of propane to the dehydrogenation process so that the oxygen and hydrogen are burned to provide the heat required for the catalytic dehydrogenation process while moving the reaction to the dehydrogenation direction. Dehydrogenation tests show that the stability of the catalyst in the H2 / O2 system is the most critical. With Pt-Sn / Ce-γ-Al2O3 as catalyst, the introduction of oxygen can significantly improve the conversion of propane, eliminate carbon deposition, increase the activity of catalyst and partially compensate the heat required for the reaction, and obtain higher propylene yield. The results of quantitative analysis of carbon deposition and hydrogen pulse adsorption show that the existence of Ce is the key factor to maintain the stability of the catalyst. The existence of Ce can enhance the anti-sintering ability of Pt particles and stabilize the surface structure of the catalyst. At the same time, Dehydrogenation reaction rate.