To research the non-equilibrium sorption kinetic models of SrCl2 compound sorbents-NH3 working pairs

the sorption and desorption performance of SrCl2-expanded natural graphite treated with sulfuric acid (ENG-TSA) composite sorbents with the ratio of 4:1 (SrCl2:ENG-TSA) is tested and researched. Results show that the non-equilibrium sorption processes are controlled by two variables other than single variable. Then

the isobaric sorption/desorption processes and the hysteresis phenomena were analyzed

and the kinetic models were established. The refrigeration performance of composite sorbents is studied

and the corresponding COP and theoretical refrigerating capacity are analyzed by equilibrium data

experimental data

and modelling data

respectively. The results show that the established kinetic model fit the experimental data well. For instance

compared with the experimental data the error of COP by the established kinetic model is less than 1%

while that value by theoretical equilibrium data is 25.8% (under the condition of evaporating temperature of 0℃

environmental temperature of 25℃

and heating temperature higher than 90.5℃). The system refrigerating capacity obtained by theoretical equilibrium data is 188.1% higher than that gotten from the experimental data

while the value by kinetic model is just 2.1%.