高纯氮气发生器是一种抢先的气体别离技术，以进口碳分子筛(CMS)为吸附剂，选用常温下变压吸附原理(PSA)别离空气制取高纯度的氮气。氧、氮两种气体分子在分子筛表面上的分散速率不相同，直径较小的气体分子(O2)分散速率较快，较多的进入碳分子筛微孔 ...

The parking loopholes and tricks every driver should know to beat unfair fines | Money blog Today, we're tackling the issue that floods our inbox like no other: parking. From injustices to loopholes, ...

②步骤②能否用氨水代替NaOH溶液？ 提示：不能；原因是Al3＋与过量氨水反应生成Al(OH)3沉淀，达不到分离Al3＋、Fe3＋的目的。 ③步骤③中若将CO2的量改为“少量”，得到的产物还是NaHCO3吗？ 提示：不是NaHCO3而是Na2CO3。 提示：不合适；因为过量CO2与NaAlO2、Na2SiO3 ...

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