Comparison of Removal Efficiencies for Ammonia and Amine Gases between Woody Charcoal and Activated Carbon
Comparison of Removal Efficiencies for Ammonia and Amine Gases between Woody Charcoal and Activated Carbon
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DOI：
10.1248/jhs.50.148
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发表时间：
2004-04
影响因子：
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通讯作者：
T. Iyobe;Takashi Asada;K. Kawata;K. Oikawa
中科院分区：
文献类型：
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作者：
T. Iyobe;Takashi Asada;K. Kawata;K. Oikawa
在500°C下，通过在冷却（5°C）和室温（20°C）下在5升袋中的NH3、（CH3）NH2、（CH3）2NH和（CH3）3N浓度的衰减来确定木质木炭和活性炭对NH3、（CH3）NH2、（CH3）2NH和（CH3）3N的去除效率。讨论了吸附剂对四种气体的吸附性能，并注意吸附剂表面的物理和化学特性。结果表明，在两种温度下，木质炭表面的高酸性比活性炭更适合吸附NH3和（CH3）NH2气体，且随着比表面积的增加，具有较大的微孔和中孔体积的活性炭对（CH3）3N气体的吸附能力比木质炭高。此外，在5°C下，活性炭比木质木炭更适合于（CH3）2NH气体吸附，但在20°C下，使用活性炭的去除效率低于木质木炭。吸附剂上大量的酸性官能团具有较高的吸附势，就像20°C时化学吸附对（CH3）2NH气体的吸附增强作用一样。
The removal efficiency of NH3, (CH3)NH2, (CH3)2NH and (CH3)3N into woody charcoal carbonized at 500°C and activated carbon was determined by the attenuation of their concentrations in the 5 l bags at cool (5°C) and room temperature (20°C). A discussion follows on the deodorization performance against four gases with attention to the physical and chemical characteristics of adsorbent surfaces. It was found that the high acidity of woody charcoal surface was more suitable for the adsorption of NH3 and (CH3)NH2 gases than the activated carbon under both temperatures, and the activated carbon having larger micro, meso pore volumes following an increase in specific surface area showed higher capacity for (CH3)3N gas adsorption than the woody charcoal. Also the activated carbon is more suitable for (CH3)2NH gas adsorption than the woody charcoal at 5°C, but its removal efficiency using the activated carbon is lower than the woody charcoal at 20°C. Much acidic functional groups on the adsorbent has high adsorption potential just like chemical adsorption is necessary to enhancement of (CH3)2NH gas at 20°C.