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[求助]
吸附脫附曲線不閉合確定是錯誤的嗎? 已有1人參與
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查了很多關(guān)于氮吸附中吸附和脫附曲線不閉合的問題,好像都是說實驗有問題等等,或者就是把之前的帖子放在那里,感覺沒有解決這個問題似的,感覺如果是實驗操作的問題不可能那么多人都遇到吧? Preparation and catalytic testing of mesoporous sulfated zirconium dioxide with partially tetragonal wall structure這個文章當中,所有給出的吸附脫附曲線都是不閉合的 《生物質(zhì)再燃過程的試驗研究及數(shù)值模擬》這個博士論文中的吸附脫附曲線也是 而且書中對回滯環(huán)的分類H1-H4中也有虛線的存在,按照虛線吸附和脫附曲線不就是沒有閉合嗎?對此的說明為: With many systems, especially those containing micropores, low pressure hysteresis (indicated by the dashed lines in Figure 3), may be observed extending to the lowest attainable pressures. Removal of the residual adsorbed material is then possible only if the adsorbent is outgassed at higher temperatures. This phenomenon is thought to be associated with the swelling of a non—rigid porous structure or with the irreversible uptake of molecules in pores (or through pore entrances) of about the same width as that of the adsorbate molecule. |
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