The authors designed and tested a humid air system (HAS) for reducing NOx emissions of an LPG-powered forklift. The HAS uses distilled water and heat from the exhaust to generate steam that is injected into the intake air of the engine to increase humidity and thus achieve NOx reduction. Field tests with HAS have shown 2.2 ppm of NOx reduction with each percent increase in humidity of the intake air. A provisional patent based on the developed system has been filed.
Digital Object Identifier
humid air system, construction equipment, emissions reduction
Construction Engineering and Management
Hamid Rahai and Jeremy Bonifacio. "Reducing NOx Emissions of Cargo Handling Equipment (CHE) with Humid Air Systems" Mineta Transportation Institute Publications (2020). doi:https://doi.org/10.31979/mti.2020.1859