In my model of matlab for fixed bed adsorption column, i have obtained very large time in X-axis of breakthrough curve..i.e nearly 5*10^(5) second. Is it possible? why it is higher. please suggest?
It is possible that you have a system that take 5 or 6 days for breakthrough but you should probably check carefully to see if you are using the correct and consistent units.
for example accidentally using mg instead of g in your simulation would make a big difference.