The impact of silver–zinc coated catalytic converters on compression ignition engine emissions with Mg‐doped <scp>ZnO</scp> nano‐additives in diesel–fish oil fuel blends: An experimental analysis

Abstract The engine emissions' impact on human and environmental society enforced researchers in academia and industry to search for an alternate solution to this problem. In this current research work, an Ag‐Zn coated catalytic converter is used in a CI engine with diesel, B100, and B30 Mg–ZnO 75 ppm for various engine operating loads at a constant speed of 1500 RPM to perform emission study. Engine emissions (CO, NO x , and HC) have been compared with and without the catalytic converter. Results indicated significant emission reduction with the catalytic converter, attributed to the catalytic action of silver and zinc, advocating for oxidation of CO and HC within CO 2 , NO x 's oxy‐reduction and H 2 O into O 2 and N 2 . Emissions were reduced at 100% load by 63%–70% for Diesel, 64%–74% for B100, and 62%–65% for B30 Mg–ZnO 75 ppm with the catalytic converter, unlike the conventional engines. B30 Mg–ZnO 75 ppm has shown the most effective reduction. Integrating Ag (silver) and Zn (zinc) catalyst‐coated catalytic converters with nano‐additive and biodiesel blends represents a good prospect to achieve emission standards economically. This study will help solve the environmental degradation caused by internal combustion engines in automotive and energy sectors and presents a solution that is feasible for emission control.