Emission controls for automobiles focus on minimizing the amount of unburned volatile organic compounds (VOCs), NOx (primarily NO), and toxic carbon monoxide (CO). Explain why some air is injected into the exhaust gases before they are passed over a catalytic converter.
2006-12-04 13:52:58 · 4 answers · asked by Steven I 1 in Science & Mathematics ➔ Chemistry
I can think of a few reason why you would do this. First of all, they could be trying to lower the temperature of the gas entering the catalytic converter. The catalyst in the converter is a mesh of platinum and some ceramics, and I'm not sure how well it would hold up to the temperature of the exhaust gases. Also, the exhaust gases dont have much in the way of oxygen with which to combine the CO to make CO2 and burn the extra hydrocarbons. Car engines burn fuel pretty close to stoichiometric (which means there's exactly enough oxygen for the fuel to burn). By introducing some fresh air you would drastically increase the amount of oxygen available to help complete the reaction.
2006-12-04 13:59:03 · answer #1 · answered by merlin692 2 · 0⤊ 0⤋
Emission gases have a low level of oxygen,they need more oxygen to complete the burn of un-burnt gases in the converter.
2006-12-04 14:08:30 · answer #2 · answered by Anonymous · 0⤊ 0⤋
so that the unburned hydrocarbons have oxygen to finish burning off in the converter
2006-12-04 13:56:06 · answer #3 · answered by AEracer40 3 · 1⤊ 0⤋
>> Will i bypass emissions? No way. ==== >> do I actual have the different techniques?? you may sign up the motor vehicle in neighboring state. autos out of state are no longer concern to being ticketed by employing your state (for emission violation, lacking emission sticky label, etc.). stable success...
2016-10-14 00:48:35 · answer #4 · answered by Anonymous · 0⤊ 0⤋