Process and device for the production of a gas mixture containing CO2 to fertilize hothouse plants

摘要

Production of a carbon dioxide-containing gas mixture (I), as exhaust gas from a stationary gas-fueled internal combustion engine, involves operating the engine at an air index lambda of 0.95-10.0, catalytically reducing nitrogen oxides in the exhaust gas and supplying pressurized air and catalytically reducing carbon monoxide and hydrogen. Production of a carbon dioxide-containing gas mixture (I), as exhaust gas from a stationary gas-fueled internal combustion engine, involves operating the engine at an air index lambda of 0.95-10.0, catalytically reducing nitrogen oxides in the exhaust gas (first catalytic reaction), supplying pressurized air and catalytically reducing carbon monoxide and hydrogen (second catalytic reaction), the amount of air supplied being dependent on the content of oxygen or nitrogen oxides downstream of the second catalytic reactor. An Independent claim is included for a corresponding apparatus, including the internal combustion engine, a line at the exhaust gas side leading to the greenhouse and containing the first catalyst, in the form of a 3-way catalyst; the second catalyst (oxidation catalyst) and a first air inlet, upstream of the oxidation catalyst and provided with a choke.