A small scale laboratory experiment would surely not pose any significant environmental concern in terms of CO emission; but you may be possibly considering the scale-up of the procedure. Obviously, any released CO can not be allowed to accumulate in the laboratory. There are commercial particulate catalysts that can be used to low temperature oxidation or CO to CO2; such as CARULITE™ 300, which is based at manganese dioxide/copper oxide, available from Carus Corp.; or either Sofnocat™ 423 or 514, based at platinum, palladium and tin oxide, from Molecular Products Ltd. Earlier catalysts developed for CO oxidation, are 'Hopcalite II', based at copper and manganese oxides, and 'Hopcalite I', which additionally contains cobalt and silver oxides. Other catalysts have been investigated and proposed, as described in the following papers:

http://www.nature.com/nature/journal/v458/n7239/full/nature07877.html

http://www.sciencedirect.com/science/article/pii/S0021951799924843

Thank you Carlos. I will try out one of these alternatives.

You can pass your vent over a fixed bed column comprising of amine functionalized activated carbon produced from agricultural waste to adsorbed the CO before finally venting your gas in to the atmosphere.

details on the production of the adsorbent can be found in (Alhassan et al., 2016). "CO2 Capture Using Amine-impregnated Activated Carbon from Jatropha curcas Shell".

pls let me know if you need a guide on the design of a fixed bed column for co capture.