I am currently working on photocatalytic hydrogen production but I am unable to convert hydrogen value into micromoles/g/h.
The results obtained from GC TCD, file is attached below.
A bit strange chromatogram. Normally hydrogen gives only 1 peak (methane also). What kind of column did you use?
Calculation - you need to consider following:
Volume of 1 mmol of gas is of ~ 24,47 ml
https://en.wikipedia.org/wiki/Molar_volume
I suppose you use Ar as a carrier gas. If so you have a typical (! Alexander Galushko ) chromatogram, but the second peak is oxygen and third of nitrogen, contamination from air. You need to calibrate your GS to have a calibration curve "peak surface area - micromoles of H2." The conversion of H2 from micromolar to other units is a trivial task.
Do you have impurities in the system? As Yurii has stated above you have contamination. Photocatalytic hydrogen production is a big topic in Europe at present - especially with the supply issues in electrolysers
Thank you so much Yurii V Geletii . Ok, I'll check the contamination and will try to calibrate our system soon.
Thank you Paul McCormack . These extra peaks are due to the system being uncalibrated, I guess.
In general, peaks (number of them) depend on the carrier gas (Yirii Geletii) and type of a column you use (sorbent?). Assignments of peaks in your chromatogram could be due to the problems in "peaks identification table" (peak start/peak end = depends on software).
- Badges
- Science topic
- Similar topics
- Publishing