IGC技术表征HFC-134a在改性活性炭上的吸附特性

Characterization of HFC-134a adsorption on modified activated carbon by IGC technique

在 323.15~373.15K温度区间,采用反相气相色谱(IGC)技术分别测定了四氟乙烷(HFC-134a)在酸改性、碱改性、盐改性前后活性炭上的吸附热及脱附活化能,绘制了脱附曲线。结果表明,改性前,HFC-134a在活性炭上吸附热和脱附活化能分别为-31.889,-31.554kJ/mol;酸改性后,活性炭对 HFC-134a的吸附热和脱附活化能分别为-49.788,-51.600kJ/mol;碱改性后,活性炭对 HFC-134a的吸附热和脱附活化能分别为-46.567,-57.206kJ/mol;盐改性后,活性炭对HFC-134a的吸附热和脱附活化能分别为-42.259,-43.462kJ/mol。

The adsorption heat and desorption activation energy of the tetrafluoroethane (HFC-134a) on the activated carbons and the modified ones were measured by inverse gas chromatography (IGC) between 323.15 ~373.15 K.The results showed that the adsorption and desorption activation energy of the activated carbon were -31.889,-31.554 kJ/mol,respectively;The adsorption heat and desorption activation energy of acid-modified activated carbon on HFC-134a were -49.788,-51.600 kJ/mol,respectively;The adsorption heat and desorption activation energy of the alkali-modified activated carbon to HFC-134a were -46.567 ,-57.206 kJ/mol respectively;The adsorption heat and desorption activation energy of the salt modified activated carbon on HFC-134a were -42.259,-43.462 kJ/mol,respectively.