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The increase in the number of motorized vehicles as a common transportation has an impact on increasing air pollution. Air pollution from motorized vehicles that exceeds the threshold will result in health problems and even death in certain cases. This is because motor vehicle exhaust emissions contain harmful pollutants including carbon monoxide (CO) and hydrocarbon (HC). One of the technologies that can be used to reduce motor vehicle exhaust emissions is a catalytic converter which is installed in the exhaust duct of motorized vehicles. Catalytic converter is a tool to HC and CO emissions by using oxidation and reduction catalysts. One alternative material that can be used as a catalyst is copper (Cu). The purpose of this study was to determine the effect of using a catalytic converter with a copper (Cu) catalyst on the concentration of carbon monoxide (CO) and hydro carbon (HC) gases in the exhaust gas of a 150cc 4 stroke motorcycle. The method used is experimental, namely designing and designing a copper catalytic converter with a perforated spiral shape. Furthermore, testing and comparison of exhaust gas emission results without and using Catalytic is carried out. Based on the research results, the copper catalytic converter in the form of Swirl Blades can reduce HC gas by 41 ppm, CO by 28% and CO2 by 32%. [ABSTRACT FROM AUTHOR]

The annual growing number of motorized vehicles generates an unexpectedly depraved impact on the environment, especially on the pollution due to exhaust gases. Therefore, it is compulsory to modify the combustion gas filter system prior to being released into the environment. It is thus not surprising that the exhaust gas filter in the form of a catalytic converter has been continuously industrialized for this purpose. This research aims to discover a catalytic converter design made from a catalytic combination of brass wire and copper wire in the shape of spiderwebs by examining the catalytic converters exhaust emissions. The combined catalyst of brass wire and copper wire in the shape of a cobweb is preferred as a catalyst for catalytic converters. Regarding the affordability and accessibility, the discussed catalysts are feasible to reduce and oxidize motor vehicle emissions. The applied method in this research is the experimental method, containing steps initiated from designing the catalytic converter housing, determining the type of catalyst, to constructing a spiderwebs catalytic converter made from a combination of copper brass wire. Furthermore, testing is conducted to determine the exhaust emissions of motorized vehicles employing catalytic converters and without using catalytic converters. The results of emission testing affirmed that the application of catalytic converters made from a combined brass wire and copper wire in the shape of a spider's web could significantly reduce HC and CO emissions, along with the increasing CO2 emissions. The reduction in HC gas emissions was 39 ppm or 16.72% compared to the value without using a catalytic converter. The reduction in CO gas emission was 4.5 ppm or 20.45% compared to the value without using a catalytic converter. Meanwhile, CO2 gas emissions increased by 4.3 ppm or 9.7% compared to the value without using a catalytic converter, due to the addition of oxygen in the oxidation process. [ABSTRACT FROM AUTHOR]