The Study on Hydrocarbon Trap Based on Various Media to Reduce Evaporative Emission from Automotive Vehicles

This paper reports on the preparation of hydrocarbon (HC) trap, which can exhibit the capability to effectively reduce evaporative emission from automotive vehicles. The preparation of HC-trap was accomplished by a dipping method which involved the immersion of a nonwoven material in an aqueous solution containing powdered activated carbon. Four kinds of activated carbon are used for HC-trap preparation. HC-traps were then characterized by scanning electron microscopy (SEM), porosimeter (measurement of pore size) and tensometer (mechanical properties). We conducted butane working capacity (BWC) and vehicle evaporative emission test to check adsorption performance of evaporative emission. Given the high mesopore volume, the HC-traps exhibited high BWC and low vehicle evaporative emissions. It was also revealed that relatively smaller pore size (5-11 nm) of mesopore could be easily saturated by evaporative emissions with. HEEL stabilization. Finally, prepared HC-trap showed excellent performance of vehicle evaporative emission test and high reduction of evaporative emissions which showed 18.4 mg of reduction of total vehicle emissions.