Mohammed-El Amine Benchaabane See

http://web.mst.edu/~rezaeif/equipment.html

https://www.azom.com/article.aspx?ArticleID=12042

Yuri Mirgorod thanks sir for this answer,

i think there is no way to measure the evolution of the quantity adsorbed with respect to time at a fixed pressure value (because i can't see in the software the parameter of time). however in the gravimetric adsorption using a Rubotherm for exemple it's possible but it mess up accurancy since it's can reach a hight value of presure and in my casse in need it in the lower pressure domain

Thanks again for replying me.

Equilibrium adsorption is achieved after some time. You are looking for dynamic adsorption.

Yuri Mirgorod yes you may say so, i want to keep the pressure constant and monitor the evolution of the adsorbed quantity with time.

- what we use to do is to mesure a set of points at equilibrium that what we called adsorption Isotherm. In my case i want to establish the rate of adsorption from t=0 s to t= téq (s) for let us say 0.5 bar i.e. measuring the adsorbed quantity until reached the saturation witch will be the same as if we ptot the adsorbed quantity at saturation for 0.5 bar on the isotherm curve we would find the same result

Yuri Mirgorod i keep saying equilibrium adsorption but you are right i'm looking for dynamic adsorption.

thanks for correcting my notion