Scientific Reports· 2026Q1
Evaluation of performance and emissions of a diesel engine using dual aqueous ammonia -diesel fuel
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- Q1SCImago
- 2026year
Short summary
Using 5-15% aqueous ammonia with diesel fuel increased CO emissions by up to 42% and decreased NOx by up to 15%, but also raised brake specific fuel consumption by 13% and lowered thermal efficiency by 13% at 75% engine output.
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Key points
- Adding 5-15% aqueous ammonia to diesel fuel increased CO emissions by 17-42% and hydrocarbon emissions by 10-31% at 75-100% engine output.
- NOx emissions decreased by 5-15% and CO2 emissions by 6-17% with the addition of aqueous ammonia.
- Brake specific fuel consumption increased by 4-13% and thermal efficiency decreased by 4-13% with increasing aqueous ammonia content.
- Oxygen concentration increased by 6-10% at 75% engine output with aqueous ammonia addition.
AI-generated from the title and abstract; the full text is not read.
Abstract
Abstract The carbon footprint of fossil fuel application is a crucial indicator of the overall quantity of greenhouse gases discharged into the atmosphere. Sustainable replacements, such as aqueous ammonia, are viewed as a good approach to solve the shortage of conventional fuel, low-carbon fuels and address climate change. Emissions and performance of diesel engine running on dual fuel of diesel and aqueous ammonia were investigated. Ammonia and water were combined in volumetric amounts of 5, 10, and 15% to get around these adverse effects. Adding aqueous ammonia of 5, 10 and 15% to diesel boosted brake specific fuel consumption by 4, 7, and 13% at 75% of engine output power. Thermal efficiency of diesel and aqueous ammonia were decreased by 4, 7 and 13% when aqueous ammonia was added by 5, 10 and 15%. Aqueous ammonia of 5%, 10% and 15% demonstrated increases of 17, 32 and 42% in CO emissions about diesel, whereas the decreases in nitrogen oxides were 5, 10 and 15% in relation to diesel, respectively. At 100% of output power, increases in hydrocarbon emissions for 5%, 10%, and 15% aqueous ammonia were 10, 23, and 31% but carbon dioxide values were decreased by 6, 12, and 17% for diesel with aqueous ammonia compared to diesel oil. Increases of oxygen concentrations for 5%, 10% and 15% aqueous ammonia were 6, 8 and 10%, respectively at 75% of output power. Engine performance penalties and emissions issues limit the use of aqueous ammonia, despite its potential as a carbon-reducing supplemental fuel.
The authors' abstract, as published at the source. Scientific Reports, 2026 · DOI ↗
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Fluid Flow and Transfer ProcessesChemical Engineering