石油焦吸附水中苯酚的特征和热力学研究

A Study for Characteristic and Thermodynamic Property of Absorption of Phenol in Water on Petroleum Coke

石油焦等温吸附水中苯酚 ,浓度较大时符合Langmuir等温式 ,浓度较小时符合Fre undlich等温式 .在 9～ 32℃之间 ,吸附热 ΔH ≈ 4 82 kJ·mol- 1,吸附熵 ΔS ≈ 52J·K- 1·mol- 1,吸附Gibbs自由能ΔG =- 9 89～ - 11 0 9kJ·mol- 1.

The petroleum coke adsorbs phenol from water on isothermal, under Larger balanced concentrations it conforms to Langmuir adsorption isothermal equation, under smaller balanced concentrations, it conforms to Freundlich adsorption isotherm equation. On 9～32?℃ conditions adsorption heat ΔH  ≈4 82?kJ·mol -1 ,adsorption entropy ΔS  ≈52?J·K -1 ·mol -1 , adsorption Gibbs free energy ΔG  ≈-9 89～-11 09?kJ·mol -1 .