Its obvious that we can get Nitrogen adsorption isotherms in BET analyzer that can be further use for pore size estimation but I want to ask a question either can we replace the Nitrogen gas with CO2 in BET to get CO2 adsorption curves?
Fernando Vallejos-Burgos
You surely can.
Usually, CO2 is adsorbed at 0 oC (ice bath). Notice that you can't get the full range of relative pressures like this.
P.S.: Better to call the machine a gas adsorption apparatus, not a "BET analyzer".
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Krittamet Phothong
Hi there,
Sure! CO2 can be used as an adsorbate to adsorb on solid. I used CO2 to characterize micropore in biochar at 273K.
Regards.
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