摘要
以褐煤为原料,可溶淀粉作粘结剂,采用不同工艺制备PSA分离CH4/N2用颗粒活性炭,探讨了制备工艺及粘结剂添加比例、升温速率和活化水用量对样品分离性能的影响。结果表明,对原料碳化/水洗脱灰、添加碱式碳酸镁可以提高样品的分离性能;原料碱洗脱灰、预氧化及添加KOH不利于PSA分离CH4/N2用颗粒活性炭的制备;当碳化温度和活化温度一定时,制备PSA分离CH4/N2用GAC的最佳粘结剂添加比例、升温速率和活化水用量分别为0.15～0.2、5℃/min和1.9～0.2mL/min;优化工艺制备的GAC浓缩效果可达28.2%,优于商业活性炭和烟煤基活性炭。
The granular activated carbons（GACs） from lignite used to separate CH4/N2 were prepatated by differevt processes while tragantine was used as binder.The effects of processes,binder ratio,heating rate and activated water dose on CH4/N2 separation capabilities and pore structure of GACs were investigated.The resuolts showed that pre-treatment method of carbonization/washing and addition agent of Mg2CO3（OH）2 could improve the CH4/N2 separation capabilities of samples while caustic wash and pre-oxygenation of raw material and KOH added in lignites were reduced the CH4/N2 separation capabilities of samples.When the carbonization temperature and activation temperature were invariable,the optimal mass ratio of binder,heating rate and activated water dose were 0.15-0.2,5℃/min and 1.9-0.2mL/min.The concentration of methane by GAC prepared by optimized process was 28.2%,and it got the advantage over commercial activated carbon and activated carbon from bituminouscoal.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2011年第4期650-654,共5页
Journal of Functional Materials
基金
国家自然科学基金资助项目(50774104)
教育部重点资助项目(107090)
关键词
褐煤
颗粒活性炭
制备工艺
变压吸附
CH4/N2
lignite
granular activated carbons
preparation processes
pressure swing adsorption
CH4/N2
