BET analysis failed, possible reasons?

Thilini Gunawardhana @Thilini_Gunawardhana

16 November 2022 0 2K Report

I tried to analyze the BET specific surface area and the micro/meso pore distribution of four materials namely; pine bark, rice husk, coconut husk and oakwood

All the samples were powdered samples (63-150 micrometer), pre-treated with 0.25M H2O2. Samples were oven dried at 105oC for 16 hours before submitting for the analysis. However, the technician informed that, when trying to do the analysis by N2 adsorption, N2 was not well adsorbed to the adsorbent materials and only the SSA results can be obtained (not the pore distribution analysis). She dried the samples again and tried to do the analysis, but it still failed.

What could be the possible reasons for this situation? H2O2 inhibit N2 adsorption?

Thank you so much in advance.

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