甲烷在活性炭上的超临界温度吸附实验及理论分析  

Experiment and theoretical analysis of methane adsorption on activated carbon under supercritical temperature

作　　者：解晨[1] 郑青榕[1] 

机构地区：[1]集美大学轮机工程学院福建省船舶与海洋工程重点实验室,福建厦门361021

出　　处：《天然气化工—C1化学与化工》2012年第1期40-44,共5页Natural Gas Chemical Industry

基　　金：福建省高等学校新世纪优秀人才计划支持(Z80136);福建省科技厅高校专项(JK2010030)

摘　　要：为研发ANG吸附剂,本文选择比表面积为2074m2.g-1的活性炭SAC-02,在温度区间263.15K～313.15K、压力范围0 MPa～8MPa,应用Setaram PCT Pro E&E测量甲烷在SAC-02活性炭上的吸附等温线,并由D-A方程、Clausius-Clapeyron方程和Virial方程标绘分析了实验数据。结果表明,当压力高于0.08MPa时,确定参数后的D-A方程预测实验数据的相对误差小于5%;甲烷在SAC-02活性炭上的等量吸附热反映了甲烷在能量非均匀表面吸附的特点,数值为13.99kJ.mol-1～17.57 kJ.mol-1,极限吸附热随温度呈线性变化,其平均值为19.43kJ.mol-1。For the development of adsorbent for adsorption of natural gas（ANG）,Setaram PCT Pro EE was employed to measure the isotherms of methane adsorption on the activated carbon SAC-02 with specific surface area of 2074 m2·g-1 over a temperature range of 263.15K-313.15K and a pressures range of 0-8MPa.Dubinin and Astakhov＇s equation（D-A equation）,Clausius-Clapeyron equation and Virial plot were used to fit and analyze the adsorption data.The results showed that when the pressure was higher than 0.08MPa,the modified D-A model could much accurately predict the adsorption data with a mean relative error of less than 5%;the isosteric heat of methane adsorption on the activated carbon was 13.99kJ·mol-1-17.57 kJ·mol-1,which revealed the adsorption of methane on energy heterogeneous surface;the limit isosteric heat of methane adsorption linearly changes with temperature,and the average value was 19.43kJ·mol-1.

关 键 词：甲烷 活性炭 吸附模型 吸附热 

分 类 号：TQ21[化学工程—有机化工]