Acta Phys. -Chim. Sin. ›› 1994, Vol. 10 ›› Issue (08): 698-703.doi: 10.3866/PKU.WHXB19940806

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Characterization of Solid Superacidity by Butane Isomerization Reaction at Ambient Temperature

Gao Zi, Chen Jian-Min, Tang Yi, Hua Wei-Ming   

  1. Department of Chemistry, Fudan University, Shanghai 200433
  • Received:1993-04-09 Revised:1993-08-09 Published:1994-08-15
  • Contact: Gao Zi

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Abstract:

Butane reactions on SO~(2-)_4/ZrO_2 type solid superacids at ambient temperature were studied. The butane isomerization selectivity is higher than 95% while the total reaction conversion is lower than 50%. The rate of the butane isomerization reaction follows the rate law of a first-order reversible reaction. The reaction conversion, rate constant and activation energy of the isomerization reaction are dependent on the superacidity of the solid catalysts. As the H_o of the catalysts is increased, the reaction conversion and rate constant are increased and the activation energy is decreased. The butane isomerization at ambient temperature is a good probe reaction for the characterization of solid superacidity.

Key words: SO2-4/ZrO2 system, Solid superacid, Butane isomerization, Characterization of superacidity