Study on the Drying Mechanism and Dynamics of Palygorskite

Abstract:

Palygorskite had large applications in chemical, environmental protection, medicine processes and so on. However, since the mineral limitations of natural palygorskite, both improving its quality and meeting the need of industry, palygorskite usually needs to be activated before using it. The influences of activation during the drying process were studied, as well as the drying kinetics of the non-activated of palygorskite. The results showed that the drying rate of palygorskite increased at first，and then came to a constant value, and kept that value for some time. After that, drying rate decreased with time going. Compared with drying curves of the non activated palygorskite, the samples made some changes after activation. The drying process of non activated palygorskite could be described as the equation of MR=exp(-ktⁿ).The diffusion activation energy (E) of non activated palygorskite was equal to 17.14kJ.mol^-1, former factors of Arrhenius was equal to 4.19×10^-5 m².s^-1.

• Periodical: Advanced Materials Research (Volumes 706-708)
• Pages: 456-459
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.706-708.456
• Online since: June 2013
• Authors: Shi Long Wang, Li Na Wang
• Keywords: Activation, Drying Dynamics, Palygorskite

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