农业机械学报2013，Vol.44Issue(3)：119-123,5.DOI:10.6041/j.issn.1000-1298.2013.03.022
CH4/CO2混合气中CH4的变压吸附法提纯试验
Purification of CH4 from CH4/CO2 Mixture by Pressure Swing Adsorption
摘要
Abstract
Selective adsorption of CO2 from its mixture with CH4 on several commercial molecular sieves was studied at ambient temperature ( 25℃) and low pressure (0.2 MPa). The behaviours of the molecular sieves were compared by using three basic parameters: selectivity, adsorption capacity and regenerability. The results indicate 3A and 4A molecular sieves have low CO2 adsorption capacity. However 5A and 13X molecular sieves show high efficiency in dynamic separation of CH4 and CO2 when the adsorbents are used for the first time. The separation coefficient between CH4 and CO2 on 13X molecular sieve is higher than 5A, which proves 13X molecular sieve show better performance in separating CO2 from its mixture with CH4. But 5A and 13X molecular sieve could not be regenerated completely by vacuuming and the adsorption/regeneration performance became stable from their second use. The reason why separation performance of 5A and 13X molecular sieves decrease is explained by FTIR spectroscopy that the partial poisoning of the molecular sieves happened. That is to say the regenerability of the two molecular sieves need improve.关键词
沼气/变压吸附/分子筛/再生Key words
Biogas/Pressure swing adsorption/Molecular sieve/Regeneration分类
农业科技引用本文复制引用
杨海燕,李文哲,张鸿琼..CH4/CO2混合气中CH4的变压吸附法提纯试验[J].农业机械学报,2013,44(3):119-123,5.基金项目
科技部国际科技合作资助项目(2010DFB60680-1)、"十二五"国家科技支撑计划资助项目(2011BAD15B00)和哈尔滨市科技创新人才研究专项资金资助项目(2010RFQXN089) （2010DFB60680-1）
