On-Line Photoionization Mass Spectrometric Study on Behavior of Ammonia Poisoning on H-Form Ultra Stable Y Zeolite for Catalytic Pyrolysis of Polypropylene

在这个工作，热分解光电游离 time-of-flight 团 spectrometry (Py-PI-TOFMS ) 被使用学习为聚丙烯(PP ) 的催化热分解在 H 形式极端稳定的 Y (HUSY ) 沸石上毒害的氨的行为。第一，在 HUSY 上毒害的氨被执行与酸地点的不同力量和数量获得合适的催化剂。第二，为有各种各样的酸力量的 PP 和 HUSY 的热分解产品的联机光电游离团系列在不同热分解温度被记录。最后，有温度的增加的 PP/HUSY 的各种各样的 pyrolysates 的形成曲线是坚定的。我们的结果显示 PP 的热分解产品的形成温度，收益和选择与 HUSY 的酸力量表明明显的关系。

In this work, pyrolysis photoionization time-of-flight mass spectrometry （Py-PI-TOFMS） was applied to study the behavior of ammonia poisoning on H-form ultra stable Y （HUSY） zeolite for the catalytic pyrolysis of polypropylene （PP）. Firstly, ammonia poisoning on HUSY was performed to obtain the suitable catalysts with different strength and amounts of acid sites. Secondly, online photoionization mass spectra for the pyrolysis products of PP and HUSY with various acid strength were recorded at different pyrolysis temperatures. Finally, the formation curves of various pyrolysates of PP/HUSY with the increase of temperature were determined. Our results indicate that the formation temperatures, yields and selectivity of the pyrolysis products of PP demonstrate obvious relationship with the acid strength of HUSY.