CJCU

Chem. J. Chinese Universities ›› 2002, Vol. 23 ›› Issue (8): 1504.

• Articles • Previous Articles     Next Articles

Studies on the Multiphoton Ionization Dissociation of HFC-152a and HFC-134a and the Evaluation for Their Application Prospects

WANG Qing1, SUN Feng-Long1, WANG Wen-Qing1, WANG Xu2, YANG Da-Lin2, ZHU Qi-He2   

  1. 1. Department of Technical Physics, Peking University, Beijing 100871, China;
    2. Institute of Chemistry, Chinese Academia Sinica, Beijing 100080, China
  • Received:2001-05-21 Online:2002-08-24 Published:2002-08-24

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Abstract: The multiphoton ionization dissociation of HFC-152a and HFC-134a under the irradiation of 355 nm and 266 nm was studied in this work. Their photolyzed products were analyzed by time-of-flight mass spectrum instrument. The photolyzed products of HFC-152a include H+(m/z =1), C+(m/z =12), CH3+ (m/z =15), C2+(m/z =24), CF2H+(m/z =51), and CF+(m/z =31), whereas there is no clear products for HFC-134a photolyzation. Further, the application prospects of HFC-152a and HFC-134a in refrigeration sector were also evaluated from the view point of environmental protection, synthesis conditions and usage performance. It is suggested that HFC-152a is a better alternative compared to HFC-134a in refrigeration sector.

Key words: Multiphoton ionization, HFC-152a, HFC-134a, Time-of-flight mass spectrum

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