Fluorine-enhanced Pt/ZSM-5 catalysts for low-temperature oxidation of ethylene†,Catalysis Science & Technology

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Fluorine-enhanced Pt/ZSM-5 catalysts for low-temperature oxidation of ethylene†
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2018-03-06 00:00:00 , DOI: 10.1039/c8cy00130h
Hongling Yang _{1,

2,

3,

4,

5} , Chunyan Ma _{1,

2,

3,

4,

5} , Gang Wang _{1,

2,

3,

4,

5} , Yonggang Sun _{1,

2,

3,

4,

5} , Jie Cheng _{1,

2,

3,

4,

5} , Zhongshen Zhang _{1,

2,

3,

4,

5} , Xin Zhang _{1,

2,

3,

4,

5} , Zhengping Hao _{1,

2,

3,

4,

5}

Affiliation

The low-temperature oxidation of ethylene (C₂H₄) is of critical importance in some specific places and environments such as refrigeration storage, but the catalyst stability needs to be further improved. The microporous Pt/ZSM-5 catalyst prepared in this study exhibited excellent catalytic performance in C₂H₄ oxidation. The modification of F on Pt/ZSM-5 was further investigated to explore the possibility of enhancing the catalytic performance for low-temperature oxidation of ethylene. Compared with unmodified Pt/ZSM-5 catalyst, the F modification has efficiently improved the reaction stability of the Pt/ZSM-5 catalyst. The conversion of C₂H₄ over 0.5% Pt/F-ZSM-5 could be sustained at 100% for more than 11 h at 25 °C. This study showed that the acidity and water tolerance of catalysts were crucial factors that affected the catalytic stability. The enhancement of the Brønsted acidity of the F-treated ZSM-5 was favourable for the adsorption and activation of C₂H₄ molecules onto the Pt/F-ZSM-5 catalysts. The F modification prolonged the catalyst life by improving its water tolerance. Thus, Pt/F-ZSM-5 has the potential to be an efficient low-temperature catalyst for C₂H₄ elimination in possible applications.

中文翻译：

氟增强的Pt / ZSM-5催化剂，用于乙烯的低温氧化†

乙烯（C ₂ H ₄）的低温氧化在某些特定的场所和环境（例如冷藏）中至关重要，但是催化剂的稳定性需要进一步提高。本研究中制备的微孔Pt / ZSM-5催化剂在C ₂ H ₄氧化中表现出优异的催化性能。进一步研究了F在Pt / ZSM-5上的修饰，以探讨增强乙烯低温氧化催化性能的可能性。与未改性的Pt / ZSM-5催化剂相比，F改性有效地提高了Pt / ZSM-5催化剂的反应稳定性。C ₂ H ₄的转化在25°C下，超过0.5％的Pt / F-ZSM-5可以100％维持11小时以上。这项研究表明，催化剂的酸度和耐水性是影响催化剂稳定性的关键因素。F处理过的ZSM-5的布朗斯台德酸度的提高有利于C ₂ H ₄分子在Pt / F-ZSM-5催化剂上的吸附和活化。F改性通过提高其耐水性延长了催化剂寿命。因此，Pt / F-ZSM-5有潜力成为在可能的应用中消除C ₂ H ₄的有效低温催化剂。

更新日期：2018-03-06

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