To explore the coupled effect of heat and mass transfer

the coupled model of heat and mass transfer for a fixed bed adsorption process was established according to the Soret effect and the Dufour effect theory. Numerical analysis methods were adopted to discuss the influences of heat transfer coefficients

mass transfer coefficients

and the coupled effect of heat and mass transfer on the fixed bed adsorption process respectively. Results have shown that heat transfer coefficients have little effect on mass transfer. To the degree of influence on the temperature field

the greatest is the heat transfer coefficient

followed by the axial thermal conductivity

the smallest is the external heat transfer coefficient.  The mass transfer coefficients have some impact on the heat transfer and the mass transfer effect caused by the temperature gradient is more obvious than the heat transfer effect caused by the concentration gradient.