Analysis of Gasoline Engine Exhaust Emissions Using a Hydrocarbon Crack System Ahmad Arif, Osvaldo Adven Kurniawan, Donny Fernandez, M. Yasep Setiawan, Wagino, Milana and Hendra Dani Saputra E3S Web Conf., 500 (2024) 03029 Published online: 11 March 2024 DOI: 10.1051/e3sconf/202450003029