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fengqing504

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[求助] 实验遇到的问题

我实验遇到一个大问题,想不明白,用程序升温法做一氧化碳甲烷话,每个温度稳定40分钟进样,300度时进样转率很低,因为色谱出了点问题,在300度多稳定了几十分钟,再进样转化率变得很高(85%左右),我后来又降到室温,升到300度稳定60分钟,转化率又很低了,后来我在降到室温重新升到300度,转化率又很高了,我把温度降到250稳定一段时间,转化率也很高,以前在250基本是不反应的,(我用的气相色谱,不是色谱的问题,因为我要测气速,从气速也大概可以看出转化率),我要疯了,哪个高手能解答啊

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