Agilent 7890B GC+5977B MSD for CO2 hydrogenation

Question

Hi!

Greetings from UCONN!

We have an Agilent 7890B GC system coupled with an Agilent 5977B MSD.

We previously used it to online monitor the composition of the simulated exhausted gas, which mainly contains CO, CO2, H2, O2, NO, C2H4, C3H6, C3H8, and the method was developed for these components.

The basic setups and system schematics are shown in the attached images.

Now we want to use this system to monitor the products of CO2 hydrogenation reactions, which mainly contains CO, CO2, CH3OH, dimethyl ether (DME) and CH4.

Among them, CH3OH, DME, and CH4 can be in quite low concentration, ~100ppm.

I want to know if the current setups, especially the columns, can be used to measure the concentration of CO, CH3OH, DME, and CH4.

If it works, any suggestions are welcome.

Thanks.

Xingxu Lu

Dr. Know · Accepted Answer

Hi, 
 from an application standpoint your system should work for the more polar components too. You would need to monitor a little longer. 
 BTW: you cannot analyze NO by GC id the is even a trace level of O2 is present as is oxidizes immediately to NO2, which dimerizes to N2O4 in a pressure-dependent equilibrium (NO also dimerizes to N2O2 pressure-dependent) that's why the world calls it NOx. And NOx is damaging columns too. 
 Regards, 
 Norbert

Agilent 7890B GC+5977B MSD for CO2 hydrogenation

Top Replies