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首页> 外文期刊>Applied Surface Science >Water Vapor Adsorption Onto Activated Carbons Prepared From Cattle Manure Compost (cmc)
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Water Vapor Adsorption Onto Activated Carbons Prepared From Cattle Manure Compost (cmc)

机译：牛粪堆肥（cmc）制备的活性炭上的水蒸气吸附

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摘要

Activated carbons were prepared from cattle manure compost (CMC) using zinc chloride activation. The structural and surface chemical characteristics of CMC-based activated carbons were determined by N_2 adsorption-desorption and Boehm titration, respectively. The water vapor adsorption properties of the prepared activated carbons with various pore structure and surface nature were examined, and the mechanism of water adsorbed onto activated carbon was also discussed. The results show that the adsorption of water vapor on carbons begins at specific active sites at low relative humidity (RH), followed by micropore filling at medium RH through the formation of pentamer cluster of water molecules in the narrow micropores. The water vapor adsorption capacity of activated carbon is predominantly dependent on its pore volume and surface area. Although capillary condensation is not the mechanism for water adsorption onto activated carbon, water can adsorb on narrow mesopore to some extent.
机译：活性炭是使用氯化锌活化法从牛粪堆肥（CMC）中制备的。分别通过N_2吸附-解吸和Boehm滴定法确定了基于CMC的活性炭的结构和表面化学特性。研究了制备的具有各种孔结构和表面性质的活性炭的水蒸气吸附性能，并探讨了水吸附在活性炭上的机理。结果表明，水蒸气在碳上的吸附从低相对湿度（RH）的特定活性位开始，然后通过在狭窄的微孔中形成水分子的五聚体簇而在中等RH进行微孔填充。活性炭的水蒸气吸附能力主要取决于其孔体积和表面积。尽管毛细管冷凝不是水吸附到活性炭上的机制，但是水可以在一定程度上吸附在狭窄的中孔上。

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