alt Hacker News> For use in industry, urea is produced from synthetic ammonia and carbon dioxide. As large quantities of carbon dioxide are produced during the ammonia manufacturing process as a byproduct of burning hydrocarbons to generate heat (predominantly natural gas, and less often petroleum derivatives or coal), urea production plants are almost always located adjacent to the site where the ammonia is manufactured.
To be clear, the CO2 is captured from the fuel burned in producing the ammonia?
... how much of it?
No, capturing CO2 from combustion is hard. Ammonia plants might burn methane for heat, but they don't capture its output.
The actual Haber–Bosch process for reaction directly spits methane into Hydrogen (which is combined with Nitrogen from the air) leaving CO2 as a byproduct.
The resulting CO2 is relatively pure, and it's already captured. You can feed it into anther process (such as Urea) or sell it for carbonisation of drinks.