Adapt catalyst to Renault 19 of 92

Good night friends, I have a Renault 19 of the year 92. After going to ITV they told me that I have problems with CO2 and that not having a catalyst, the level was very high.
My question is:
Does the problem be remedied by adapting the happy catalyst of a Seat Ibiza, who died in an act of service? And most importantly, can it be done?
Thanks a greeting.

If sir you can adapt any catalyst to any car, but it must be new because the used do not walk well even if the vehicle is stopped, now without catalytic you will never pass the gases so you must put it. Just buy an alternative and send it to weld and now.