What Happens Without a Catalytic Converter?
2 Answers
Without a catalytic converter to catalyze and reduce harmful gases in exhaust emissions, vehicle pollution will significantly worsen. Here is the relevant information: 1. Introduction to the catalytic converter: It is the most important external purification device installed in a car's exhaust system. It converts harmful gases such as CO (carbon monoxide), HC (hydrocarbons), and NOx (nitrogen oxides) emitted from vehicle exhaust into harmless carbon dioxide, water, and nitrogen through oxidation and reduction reactions. Since this converter can simultaneously transform the three major harmful substances in exhaust into harmless substances, it is called a three-way catalytic converter. 2. How a catalytic converter works: When high-temperature exhaust gases pass through the purification device, the catalyst in the converter enhances the activity of CO, HC, and NOx, promoting specific oxidation-reduction chemical reactions. CO oxidizes at high temperatures into colorless, non-toxic carbon dioxide gas; HC compounds oxidize into water (H2O) and carbon dioxide; and NOx is reduced into nitrogen and oxygen. These three harmful gases are converted into harmless gases, thereby purifying the vehicle's exhaust.
My car had a problem before - the catalytic converter was stolen, and the consequences were quite severe. The exhaust became extremely foul-smelling, to the point where neighbors complained about the unpleasant odor, and I could even smell it myself while driving. Fuel consumption also increased significantly, burning about 10% more fuel, which hit my wallet hard. The most critical issue was failing the vehicle inspection outright - the testing station said emissions were way over the limit, resulting in a fine of several hundred yuan. The mechanic warned me to replace it immediately, otherwise the oxygen sensor might also fail, leading to even more expensive repairs. I also noticed occasional power loss while driving, with the engine light constantly on, which kept me on edge. I'd advise fellow car owners to always lock their vehicles - catalytic converters are easy targets for theft, and driving without one brings nothing but trouble.
