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烟煤制备成型活性炭及其PSA浓缩CH4/N2中CH4的性能研究
Study on the preparation of shaped active carbon by bituminous coal and its performance for concentrating methane from CH4/N2 by pressure swing adsorption
【摘要】 以重庆烟煤为原料,采用碳化-活化-气相沉积工艺制备了变压吸附(PSA)浓缩CH4/N2中CH4用的成型活性炭,考察了制备工艺条件对活性炭浓缩CH4/N2中CH4效果的影响。用低温液氮吸附方法对活性炭的孔结构进行了表征。实验结果表明,制备的成型活性炭在单循环五步PSA过程的抽真空步骤可使CH4的浓度较原料气提高20.0%(体积分数)左右。对浓缩效果为20%(体积分数)的AC-1活性炭进行了表征,其BET比表面积为580m2/g,微孔孔容为0.14cm3/g,孔径分布主要集中在2.0~4.0nm。
【Abstract】 Shaped active carbon adsorbents using bituminous coal from Chonqing mine as raw material for concentrating methane from CH4/N2 mixtures were prepared by taking carbonization-activation-deposition process and the effect of the preparation conditions on the pressure swing adsorption(PSA) concentrating performance was studied.The micro-structure characterization of active carbon was investigated by low temperature liquid nitrogen adsorption method.Experimental results showed that the methane concentration had increased 20.0vol% at the vacuum stage of PSA process with five steps using the shaped active carbon prepared as absorbent.As for one of the shaped active carbon adsorbents which concentrating effect was 20vol%,its BET specific surface area was 580m2/g,total micropore volume was 0.14cm3/g and its pore diameter size distribution was mostly between 2.0 and 4.0nm.
【Key words】 shaped active carbon; bituminous; CH4; CH4/N2; concentrating,pressure swing adsorption(PSA);
- 【文献出处】 功能材料 ,Journal of Functional Materials , 编辑部邮箱 ,2010年02期
- 【分类号】TQ424.11
- 【被引频次】19
- 【下载频次】359