英语翻译The sample was activated at 150 oC for 12h with dynamic

英语翻译
The sample was activated at 150 oC for 12h with dynamic vacuum before each measurement.The activated sample weight was measured after experiment and was used to calculate the SO2 adsorption results.The activated sample weight for Ni(bdc)(ted)0.5,Zn(bdc)(ted)0.5 and Mg-MOF-74 are 75.5 mg,94.2 mg and 95.6 mg respectively.The activated sample was sealed in chamber B under vacuum.SO2(the total impurity of SO2 gas is less than 0.1% and the water concentration is less than 0.01%) was introduced into chamber A and then the valve connecting chamber A and B was opened to let the gas adsorption reach equilibrium.This step was repeated as necessary to obtain the adsorption data points.As for the desorption part,a similar but reverse procedure was adopted.The chamber A was evacuated (1×10 -4 Torr) and then the valve connecting chamber A and B was opened to let the gas desorption reach equilibrium.This step was also repeated as necessary to obtain all desorption data points.The criterion for equilibrium was that the change in pressure was less than 0.1% within 15 min.A longer equilibrium time (1h) was used but no significant difference was observed for the pressure readings.The SO2 quantity change was determined by the pressure change in chamber A and B.The recorded pressures were used to calculate the adsorbed amount based on basic mass balance equations.