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Investigation on improvement of hydrocarbon adsorption of zeolites molecular sieves for the engine emission reduction

Author

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  • Ye, Jiahao
  • Peng, Qingguo
  • Zhang, Fugui
  • Zhang, Long
  • Liu, Hai

Abstract

The hydrocarbons (HCs) emissions caused by engine cold start pose a significant challenge for emission control and carbon management. So, the adsorption and desorption process of hydrocarbon molecules on ZSM-5 zeolite under Worldwide Harmonized Test Cycle (WHTC) conditions, validating adsorption models. The effects of various molecular sieves on the adsorption isotherms of different carbon-containing adsorbates are analyzed. The results indicate that ZSM-5 exhibits an adsorption capacity of 0.72 mmol/g for C3H6 at T = 263 K and P = 0.06 kPa, while it is only 0.0076 mmol/g for CH4. Additionally, the adsorption properties of four molecular sieves with different Si/Al ratios are investigated, and the introduction of modified cations significantly enhances adsorption capacity. The optimal performance is observed at a cation ratio of 2/4, and the ZSM-5 and MOR molecular sieves exhibit superior thermal stability. Furthermore, the highest adsorption qualities of ZSM-5, MFI and FER molecular sieves at chamber temperature are achieved for C3H6, while MOR show the highest adsorption for C2H4. The orthogonal test analysis indicates that the type of adsorbate is the most significant factor affecting the adsorption performance. The maximum adsorption capacity of 1.884476 mmol/g is achieved by MFI with adsorbate C2H4, and Na+ = 16.

Suggested Citation

  • Ye, Jiahao & Peng, Qingguo & Zhang, Fugui & Zhang, Long & Liu, Hai, 2025. "Investigation on improvement of hydrocarbon adsorption of zeolites molecular sieves for the engine emission reduction," Energy, Elsevier, vol. 340(C).
    • Handle: RePEc:eee:energy:v:340:y:2025:i:c:s0360544225047358
    DOI: 10.1016/j.energy.2025.139093
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    References listed on IDEAS

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