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木虫 (小有名气)

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专业: 催化化学

[交流] 【求助】文献中的Butane Elution是什么意思已有1人参与

各位大侠，请问文章中的这一段催化表征是什么意思？该表征是用来表征催化剂的transport的行为，本人实在不懂，请大家多多指点

Butane Elution. Elution experiments of butane isomers were
carried out at ambient pressure in a quartzmicroreactor (4mmi.d.)
coupled to an Omnistar GSD 320 O1 (Pfeiffer Vacuum) quadrupole
mass spectrometer (MS) for online gas analysis. The
zeolite (50 mg, sieve fraction 150-300 μm) was loaded between
two layers of quartz wool and rested over a porous frit. The
sample was pretreated in argon (100 cm3 min-1) at 623 K for
30 min and cooled down in the same gas to 363 K. Then, a
mixture of 100 Pa n-butane (or i-butane) in Ar (100 cm3 min-1)
was introduced. The monitored atomic mass unit was 43 for
both alkanes. After about 30 min the MS signal was stable.
Then, the flow was switched back to pure argon (100 cm3 min-1)
and the elution of the hydrocarbon from the zeolite was
followed.

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