AN INVESTIGATION OF EXPONENTIAL HEATING DESORPTION

作者：Zhang Zhenqiu^*; Pan Guisheng; Li Po

来源：Acta Physico - Chimica Sinica, 1986, 2(1): 43-50.

DOI：10.3866/PKU.WHXB19860107

Five adsorbed systems have been studied by using exponential heating desorption, Those are bersent/zeolite HZSM-5, benzene/zeolite NaY, benzene/zeolite rare-earthe-Y, benzone/mordenite and n-herane/mordenite, The experiments proved that the relation between activation energy of desorption and temperature of most desorption rate is linear, i.e. E-d = KTm.
The data of exponential temperature programmed were analysed and compared with those of linear temperature programmed The values of various kinetics para meter are coincided. Their activation energies are shown in Table1.
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The following kinetics parameter equation of exponential temperature programmed has been derived:
lnT(m)/alpha = E-d /RTm + ln E-d/ARN theta(n-1)(m),
and the equation has been compared with that of linear temperature programmed:
lnT(m)(beta)(2) = E-d/RTm + ln E-d/ARN theta(n-1)(m),
It is found that the effect of temperature deviation Delta T, on all parameter is less (2T + Delta T) times by using equation cif exponential temperature programmed than that of linear temperature programmed.
Through these experiments we found that the temperature control of exponen tial temperature programmed is easier than that of linear temperature programmed.

• 出版日期1986
• 单位中山大学