摘要
测定了253～333K下CH4和N2纯组分在炭分子筛颗粒上的吸附动力学数据及CH4和N2纯组分及其混合体系333K下在炭分子筛固定床上的穿透曲线,选择Fick扩散模型对数据进行了模拟。结果表明:吸附初期N2的扩散系数大于CH4,此时吸附剂优先吸附N2;炭分子筛固定床表现出对N2的优先吸附选择性,可以实现出口直接富集CH4的目的,且CH4浓度要求在99%以上时,收率可达75.6%。
Adsorption kinetics of CH4/N2 on the carbon molecular sieve （CMS） was studied. Kinetics data of pure CH4 and N2 adsorbed on CMS particles were determined through the volumetric principle, and the range of temperature was 253 K to 333 K. The FD model was adopted to simulate the adsorption kinetics data obtained from the CMS particles. The results show that the diffusion coefficient of N2 is larger than CH4 at the initial time of adsorption. Therefore N2 is with preferentially adsorption. In addition, the breakthrough curves of the pure CH4 and Nz and their mixture were de- termined on the fixed adsorption bed. Based on the investigation of breakthrough curves, it demonstrates that CH4 is first through the fixed bed. Thus CH4 can be enriched directly at the outlet. The yield is 75.6% when the concentra- tion of CH4 is more than 99%.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2010年第2期316-319,共4页
Journal of China Coal Society
基金
国家自然科学基金资助项目(20506019)
关键词
CH4/N2
炭分子筛
动力学
穿透曲线
扩散系数
CH4/N2
carbon molecular sieve （CMS）
kinetics
breakthrough curve
diffusion coefficient
